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HomeMy WebLinkAbout02621 - Technical Information Report - Geotechnical �, � � .�. � '� � � i :3 � i�a i� � N � �= �� FL 3 D► � �I�+ NSTREAiV� I� R1� � ' 9 � !� !� l� � �' !� I '� �� � � �` � ' `+F� `• '� �r - � .'�`' • • + ,# . � •�� � - t � ♦ � 3' � y '�r � .+e' � . �� " �, -.�. r. ` � • .� t° � � � � r _ � .� � ��1� -�=�r- � � ` � .{ ��,R ��`. � "K:� � � � � 'M� .� � �f ( . ����� � � �^z : y .:P t. � *� i�� �� "' � ! :��_ r �.. ��+ ,. �. •� + � � , r_ ',�� •� � _ r. '� � 1 �,- . � ,� � � ' ' '� ; , ► � :_ . . . R_ �. . -... . _�_ � . .� a 1 �. , I f�irpareir t I Mr. Dave Petrie � ' 811 So. 273►d Ct. Des Moiiies, WA 98198 KBS Development 12320 NE 8tti Street Suite IOU Bellevue WA 9i�005 �4lAl���!� b Eagle Creek Land & Uevefopment, LLC �c�pY 13701 SE 253rci St Kcnt. WA 98U42 �zi� M�� �•, � Prepa�ed by: �%�,F �A `'����j, ,.0.�`v %�.'ri, . Ed McCarthy. P.E., P.S. ` 9957 l 7151 Aventae SE ��WQ�d , �C�4tf� A� Renton, WA 980�9 . R�E C E 1 V E D Tel. (425) 271-5�34 6-lS-o7 /�)��t,� �UL � � F�,x 4'��r,i .-�:� 1 3432 ' � �,�vAi. � 2�7 � KING COUNTY �Q~' � �� LANO USE SERVICE� ,J � , ,��r J:� 7 �� � ' 2�2/ � 5� �i��`�� 5tree t LEVEL 3 DOWNSTREAM DRAINAGE ANALYSIS Prepared by: Ed McCarthy, P.E., P.S. 9957 171St Avenue SE Renton,WA 98059 Tel. (425)271-5734 Fax (425)271-3432 '��4�,�; Prepared for: �'�',� ..�..�!`t�. Mr. Dave Petrie 811 So. 273rd Ct. Des Moines, WA 98198 KBS Development 12320 NE 8th Street Suite 100 Bellevue WA 98005 Eagle Creek Land & Development, LLC 13701 SE 253rd St Kent, WA 98042 �� Y .. ._.. _ _ -. June 16, 2007 )l�� 1 � Z�Q� �CWG COUNT"�" LAND USE SERV1�=.:�=-`' �� � TASLE •F C�NTENTS � 1. Background Informat�on............................................................................................. 1-1 2. Hydrologic and Hydraulic Analysis of SE 144`h Street..............................................2-1 3. Drainage Mitigation Options......................................................................................3-1 I 4. Key Results and Recommendations............................................................................4-1 I� 5. References...................................................................................................................5-1 LIST OF TABLES �� Table 1. Contributing Basins..........................................................................................2-4 j Table 2. Peak Flo�v Rates at Key Locations...................................................................2-8 LIST OF FIGURES Fi ure 1. Vicini Ma - g h' P.................................................................................................... 1 2 Figure2. Study Area.......................................................................................................2-2 Figure3. Soils Map.........................................................................................................2-3 Figure4. Basin Map........................................................................................................2-6 Figure 5. SE 144`h Street Conveyance System...............................................................2-9 Figure 6. Offsite Mitigation Options..............................................................................3-2 APPENDICES Appendix A. Photographs of the Downstream System Appendix B. KCRTS Documentation for Conh-ibuting Basins Appendix B.1 KCRTS Time Series Calculations � Appendix B.2 KCRTS Pond Designs Appendix B.3 KCRTS Peak Flow Rates i Appendix C. XP-SW1vIM Model Results Appendix D. HEC-RAS Analysis of Roadway Conveyance � ' i ii 1. BACKGROUND INFORMATION This report provides an assessment of the conveyance system along SE 144`� Street in the Renton Highlands area of King County,Washington(Figure 1). 'The study area is located within a , catchment of Orting Hill subbasin(Tributary 0307) of the Cedar River watershed(King County , Department of Natural Resources, 1993 and 1997}. The conveyance system has a contributing ', drainage area of 253 acres. The conveyance route is downstream from three proposed single- ' family residential developments that are currently under drainage review at King County DDES. These developments include Threadgill Plat, Liberty Gardens, and Cavella. This Leve13 Downstream Drainage Analysis has been prepared at the request of DDES. Flooding currently occurs at locations along the SE 144`h Street conveyance system. Flooding has been observed at the intersection of the 162°d Avenue right-of-way and SE 144`�' Street (Photo No. 1 in Appendix A). In addition, King County Roads Division has recently constructed ' conveyance improvements at the intersection of 160`�Avenue SE and SE 144`�' Street, presumably to collect overflow from surrounding catch basins. While the conveyance system is apparently undersized for its contributing basin, there is a surprisingly little documentation in King County's records that flooding exists or has occurred in the past along SE 144�' Street. Neither the long-time owner of Alpine Nursery nor an original resident at Carolwood, that I interviewed, had observed road flooding along SE 144`h Street over the past several years. The evaluations presented in this report are intended accomplish the following: ' ■ Delineate the conveyance network's contributing basins and quantify the flow rates draining to the conveyance network. • Estimate the conveyance capacity of the system, including the 18-inch diameter pipe, � northerly roadside ditch, and roadway. ■ Identify areas of flooding. ■ Develop conceptual drainage solutions to mitigate impacts from the proposed and future development projects. 1-1 SE 144`''Street—Jime 100' 'i , - � - . _ , i , � __- ;�� �.� ,- ;_ _� ; t _L : ;: . k _ _ , , _ -r- �. I , � , '� M�Y Cr _ . ._-- - ' ' i--- '- --� �, -�- X � '� ��- � 1 i .-� � _ � � t� — -�T � � � c� ��` I- � � � i � �F � I,Il _ �� � � �. . � r. - _. �_ . . . . �`ii,- c� � , ; � � �; �. � _ ;�� � _� � _ : � _ � - � ��'� � �t�� � � i�k`—'- a� � - _ i ' � �I_.� i _� . _ j � . � � Lay � r- � . � ' ' __ t �i� ,. _ � � � � � �, ��. ; a. - � � � � � � �� ' . I .. � � � I i ' . - ' L '-- . � ! t"' ' �-�� -�- � � � � � �i� _ ��.� �� � i � ' � � � � � , � , ,; ,� - T �- � i ; ,. �?i � � � � � ��. SE 128th St , � r - T=� _ � t . � � � '� �� ,_ � , � , � -_ � , ! { _ � : , ' , . � f � , �_ i � � � _- �y,; Study Basin , s ---` — _ �- - � w I � 1 °' ' �; � �,._ (� �. Q � � ,' �.;� � ° � � - _ � ; t� Q � ; � - ; �l . L.'. - � � .. . � I` ��� � `�, . . . { _ - \ . 1 . � .. 1 _ �_ ' _'i ' ! _ , � :_ .. . '... . '. � ` \ � • �' , . ._ _ . ' fii�,` M. - - - . . '. ' ..... ,., . ...�. - . . . � .� :. }i" ..' � _' �- . . SE 144th St _ ' _ �; ;;: �. � , , - x. , . , - f' 4�_" � f J -� . V " — � . � �� , �I��. _� ! � ' .. . �: ! � t+ � p � 167 t,�a � ' ` �".Q�l _, J � � . __ - - _ o _ , . _ . . . s .. ' .. . ..__ _ -. ---- � --- . . . . . .. , O � . � � Q . . ', * � � �. �. _ i ( ' r1 � � �:; _ a � � « � �� s =� _ - , - � r , . i ��'. . . � I,�� �� Vicinity Map � � - �. SE 144th Street Drainage Analysis � s�»��ca�sE ���07 2,000 �e"e°",wasn"�o"se09s King County,Washington —1 Feet F�' �4����� Figure 1 ( l — � 2. HYDROLOGIC AND HYDRAULIC ANALYSIS OF SE 144TM STREEi 2.1 Contributing Basins In effort to develop a hydrologic model of the basins contributing to the conveyance system along SE 144`h Street,basin boundaries were delineated using the following resources: ■ City of Renton aerial topography (1-meter contours) �'� ■ Level 1 Downstream Drainage Analysis for Threadgill Plat(Baima & Holmberg, Inc. �' and Ed McCarthy, PE,PS.November 18, 2005) ■ Level 1 Downstream Drainage Analysis for Evendell Plat(Haozous Engineering, June 15, 2001) ■ Technical Information Report for Hamilton Place (Barghausen Consulting Engineers, June 2003) ■ Technical Information Report for Evendell Plat (Haozous Engineering, June 15, 2001) ■ Technical Inforrnation Report for Nichol's Plat (Haozous Engineering, May 2003) ■ Technical Information Report for Liberty Grove(Daley-Morrow-Poblete, Inc., February 2003) ■ Record drawings for stormwater design for Carolwood (May 1977) ■ Record drawings for stormwater design for Liberty Lane (Doneshvar and Associates, PS, June 13, 1979) ■ Record drawings for SE 144`h Street(King County Department of Public Works, January 18, 1984) ■ Record drawings for 154`h Place SE Slope Stabilization Project (King County Deparhnent of Public Works, June 23, 1997) ■ Field verification of key locations in the watershed 'The study area under consideration is shown in Figure 2. Cover types within the study area include those associated with relatively dense single-family residences, forest, and pasture. Soils in the watershed are mostly of the Alderwood series (Figure 3). However, a band of outwash soils (Everett series) exists along SE 144th Street, at the southern boundary of the study basin and extends to the south. In total, an area of 253 acres was calculated to drain to the conveyance system(Table 1). Based on cover type estimates, about 25 percent of the conh-ibuting area is effective impervious surfaces. Tt�e size and boundaries of the delineated subbasins draining to the conveyance system z-I SE 144`''Streel-June 100' (n 148th I m Jones / ��� 148th � ��� ` _.. ._ A 4164L � 14'9th I 149th � 749th �� � a P9SC0 - - �� -- - �j 150th 150th � j, � $ ; - - , � w � _ _. .. -- co � - 151st a ... � a oO� _'� � `\ ._ _ -- -- � g`,�� / 152nd � � � � f/! r / . _ � � ��, ti9� /� Rosario o�i p '� c� °� �- � v�` � C� r',.�i a� �; ' � 154th . > > �"'- � � � . cc d :�", � --- ��r. � � a � � u5�t1�'' � � . ; � 0 ; � ._� . � m � � ��� °� � a _ �ssrn � , _ � W � D � „--...�- � 4._�.�.... � �ssa, - � � 15stn .� �.._�.._..._�.._..o_..�_......._...,....�.,._..._..._...�...�..._.. ..�.. ..�:. _ � r � J � (��,� _ A .; - �.__..._ � � � W OD ' � ..__J..- vi � �i'i 157ih � `� g _ ��, � -...r �+ � � - . '_. a I � i � � � 158th ..�'��'I -_�_ _.__ . -p. 158th: y�, ..._.J ��� Y A � 'Y'�� .... _:' .. � r ` � N � ~ ? '��' " 7 .� � _.� ._. . n � .. W d .•�. � ���1 ... o ���1 �. . � _ 't�. OO �.�d'1 ° � . � � d•- N 4�091� �� ��i � A V J � � � �j N � � g �s�y� ��9� � �o� � � � g `'s� � � �s2r,d r � y � N Nj� ��...� g � p�Z9�' � �� � 1g�f� 463rd 'plL�� CA7� � ��o.�'�...r' ... g ' � 164th Q•...... ` j �� . ' �•____ ;:, _:.. ��ffl ��al II A A . ._. .. . ...- � _.. .. �i � � � � � �a....�...r9 � (.�� w'•.�RI�•.J � � °'�• .,+/`#C . - " ,-, 165th 165th � •.��° �� v. �; �' � ✓• � I � ,.;�;_�- . _ � `� ..i' A a � i .,'�p �66�1 L.�.�e.�.. .� � a �d'1 � �� � � � ���h � ro ro N �, � . .. ... � ��rt' 167th 188th ' �;, � 168th 188fh � � � �9� 169th 169th HII{ �y,� � ta C � \ A � �7�11'1 N ����fl __ � � � ._ __ � N �. __ , � � � � �/ �»St 3sLLL ` �� Table 1. Contributing Basins Basin Till Till Till Outwash Outwash Outwash ID Forest Pasture Grass Forest Pasture Grass Impervious Total li AC AC AC AC AC AC AC AC I 10 - 0.16 0.29 0.08 0.53 20 - 030 1.05 0.51 1.86 3� - 0.31 0.91 0.41 1.62 40 0.26 0.30 0.56 42 - 0.03 0.96 0.67 1.66 44 0.99 0.99 50 0.51 0.51 ' 52 - 0.01 0.80 - 0.01 0.80 1.15 2.77 54 0.03 0.03 0.83 0.04 0.04 1.24 1.44 3.64 60 0.52 0.52 70 - 0.51 1.70 - 0.34 1.13 1.34 5.04 80 5.28 0.12 4.35 0.59 0.01 0.48 3.40 1423 90 0.40 0.40 100 0.45 0.33 0.61 0.17 1.56 106 2.50 0.12 334 0.12 3.34 4.64 14.05 110 6.43 12.24 12.33 7.10 38.10 120 0.58 1.00 1.58 130 2.49 7.12 5.80 1.58 16.99 200 4.45 0.14 1.79 1.1 S 7.56 210 331 1.70 4.60 2.93 12.55 220 1.56 1.90 3.46 230 3.95 5.71 9.66 232 1.38 - - - 1.38 240 3.65 4.48 8.13 241 0.23 2.99 3.68 6.90 244 0.71 11.46 10.75 4.68 27.60 250 - 0.17 4.66 3.23 8.06 260 233 1.74 4.07 270 - - 2.22 1.60 3.82 300 9.47 1.73 4.13 1.56 16.89 304 2.12 1.36 5.73 3.74 12.95 306 1.25 0.15 0.28 0.08 1.75 310 9.32 - - - 9.32 320 8.92 0.18 0.33 0.09 9.52 330 1.37 0.34 0.62 0.17 2.50 59.71 42.22 75.40 0.63 1.32 10.47 62.98 252.73 Effective Impervious = 25% 2-4 sE ta�r�sne�r-�une?oo? were driven by the locations of catch points and the watershed's topography. A total of 35 subbasins were delineated(Figure 4). Recent higher density single-family developments contributing to the conveyance system include Hamilton Place(Catchment C-260), Evendell Plat(Catchment C-230),Nichols Place (Catchment G220), and Liberty Grove(Catchments G240 and 241). The attenuation provided by the stormwater ponds for these developments was included in the hydrologic model of the basin. In addition, the stormwater pond for Carolwood(Catchment G106) infiltrates nwoff for at least up to the 100-year event. Record drawings were also obtained for Serena Park(Catchments C-70 and C-80) and for Liberty Lane (Catchment C-330)but these older pipe detention systems from the late 1970's do not provide stibstantial detention volume and �vere n��t includcd in the }Iti drol��gy model of the basin. Record drawings for the conveyance system along SE 144`h Street(King County Department of Public Works,January 18, 1984)were found to be accurate when checked against field observations and a recent field survey. The drawings show that the 18-inch diameter CMP is perforated in the upper half of the pipe. According to the plans, the pipe is set in a gravel bed to allow infiltration. T'his design encourages infiltration and groundwater recharge by taking advantage of the relatively flat pipe slope and surrounding outwash soils. While this pipe configuration provides baseflow benefits to down gradient tributaries of the Cedar River,the perforations do not provide much flood relief during large flows. Assuming a reasonable infiltration rate of 10 inches per hour,and a 42-inch wide infiltration surface that extends from 162°d Avenue SE to 156`h Avenue SE,the rate of water infiltrating from the pipe to the native soil would be roughly 1.5 cubic foot per second. This rate is small relative to the predicted 100- year flow rate of almost 40 cubic feet per second. While the infiltration component of the _ L.� t�y�uru►o�y .�s�cssnient ut �.ulin��►uut��-; - _ ThehydrologicmodelKCRTSwasusedtode�_i. �: �,,;�, `t .,,,�� :.��:� .. � "� ,: � ; �.,� 1�.��;��,� contributing to the SE 144`h Street Conveyance system(Appendix B.1). The reduced I-hou� KCRTS time series data set was used for the Seatac rainfall region with a correction factor o f 1.0. The 1-hour time series is appropriate for the modeling conducted because flows from a sizeable portion of the basin are routed through detention ponds. In addition, the KCRTS modeling methodology neglects attenuation that occurs when time series are routed through thc watershed. Time series routing through stormwater ponds was conducted to characterize the attenuation provided by some of the more significant storage areas in the basin, including the stormwater detention system for Hamilton Place(Catchment C-260), Evendell Plat(Catchment C-230), Nichols Place (Catchment C-220), and Liberty Grove(Catchments C-240 and 241). In addition, the infiltration stormwater pond for Carolwood was assumed to infiltrate all runoff from 2-5 SE/44"Street-Jurre 1007 II __ _� ��� Ap Pe: _ _ along SE 144th Street are shown in Figure 4. The peak rates associated with the 2-, 10-, 25-, an� 100-year return periods at these same locations are listed in Table 2. The major inflow point� � the SE 144th Street conveyance system are at the intersections of 162nd Avenue SE and 156� Avenue SE. A total 100-year flow rate of 39.72 cubic feet per second was predicted to flow t SE 144th Street from contributing basins. 2.3 Hydraulic Analysis of Conveyance System The conveyance system along SE 144`h Street consists primarily of an 18-inch diameter CMP located along the south side of the road. A ditch and culvert system is located on the north side of the road. The ditch and culvert system is not continuous along the entire length of SE 144`h Street. Rather, it is broken up by segments of road with no conveyance on the north side of the road. The northerly ditch and culverts are connected to the 18-inch diameter storm pipe by 12- inch diameter cross culverts at four locations along the conveyance route. At 156`h Avenue SE (CB-6), the diameter of the pipe system increase to 24 inches. From CB 6, the pipe system continues west in the unimproved SE 144`b Street right-of-way. At CB l,the pipe is conveyed down a steep embankment to 154`h Place SE and then to an HDPE tightline down the steep ravine slope to Tributary 0307 (King County Departrnent of Public Works,June 23, 1997). A detailed field survey of the entire pipe and ditch network, including several road sections, was conducted by Barghausen Consulting Engineers(June 2007). These data were used to construct the XP-Storm and HEC-RAS models described below. The hydraulic model XP-Storm(Version 9)was used to evaluate the 18-inch diameter pipe conveyance system along the south side of SE 144`h Street. The EXTRAN layer of the model was utilized,basing hydrologic inputs on flow rates predicted by KCRTS. The XP-Storm Hydraulics engine solves the complete St. Venant dynamic flow equarions for gradually varied, one dimensional,unsteady flow throughout the drainage network. The calculation accurately models backwater effects, flow reversal, surcharging, and pressure flow. The model allows for looped networks, multiple outfalls and accounts for storage in conduits. The XP-Storm model accounts for pipe friction losses and pipe entrance and exit losses. A Manning's roughness coefficient of 0.024 was assumed in the modeling for CMP and a value of 0.012 was assumed for concrete and plastic pipe. An entrance coefficient of 0.5 and an exit coefficient of 1.0 were used at catch basin junction. XP-Storm modeling results for the 25-year peak flow rate for the conveyance pipe along SE 144`h Street is provided in Appendix C. 2-7 SE 144`"Street—June 2007 Table 2. Peak Flow Rates at Key Locations Location Return Period ears 2-Yr CFS 10-Yr CFS 25-Yr CFS 100-Yr CFS CB-18A 9.86 15.70 19.08 24.66 160 Ave SE 11.23 17.65 21.31 27.42 CB-5 11.72 18.37 22.23 28.52 CB-4C 425 6.86 8.36 10.86 CB-4 16.09 25.43 30.85 39.72 The hydraulic model HEC-RAS was used to model the roadway surface and ditch conveyance under flood conditions for the 100-year peak flow rate. The 100-year peak rate assumes that 5 cubic feet per second is conveyed in the 18-inch diameter storm pipe along the south side of the road. The remainder of the flow is assumed to be conveyed in the roadway and roadside ditch. The roadway conveyance capacity was evaluated from CB-11A(HEC-RAS Sta 0+00)to the intersection of 162"a Avenue SE(HEC-RAS Sta 10+10). HEC-RAS analysis of the roadwa� conveyance system for the 100-year peak rate indicates that the ditch system between 162" Avenue SE and 160`h Avenue SE has adequate capacity to convey the 100-year peak rate. However, driveway culverts along this reach would be overtopped. In addition, the HEC-RAS model predicted that flow depths would be up to 0.7-foot deep over driveways. HEC-RAS results are presented in Appendix D. Roadway flooding along SE 144`h Street would be considered as "severe roadway flooding problem"according to King County standards (King County Department of Natural Resources, January 2005)due to the following conditions: ■ Between the intersection of 162°d Avenue SE and 160�'Avenue SE driveway culverts along tt�e ditch on the north side of SE 144te Street would become overtopped,posing a threat of unsafe access due to indiscernible driveway edges. ■ Floodwater over the driveways on the north side of SE 144`h Street between 160`� Avenue SE and CB-1 lA would be deeper than 0.5 foot,posing a severe impediment to emergency vehicle access. 2.4 Flooding Locations and Flood Flow Paths Flows with return periods of 2 to 5 years likely surcharge the 18-inch diameter pipe system. Flows were predicted to leave the pipe and ditch drainage system at a number of locations including CB-4C, CB-l 0A, CB 14A, CB-15A, CB-1 SA-1, and CB-18A. Between the intersection of 162"d Avenue SE and 160`h Avenue SE, overflow from the catch basins is conveyed to the west in the roadside ditch on the north side of the road. From the intersection at 160`h Avenue SE,overflow from the catcb basins is conveyed to the west mainly along the north side of the road. Flooding covers the north half of the north travel lane at locations near CB-1 lA. From CB- I lA, floodwater is conveyed further west in the north travel lane until it reaches a low lying area located north of CB-9A. Depending upon the magnitude of flows, the floodwater either 2-8 SE I4d"Street—Jw�e 2007 ___ ____ __ _ _ _ infiltrates at this location outside the road right-of-way or continues to flow to the Carolwood infiltration pond. Flows larger than approximately 10 to 15 cubic feet per second likely do not reach beyond CB 5 (located at tbe intersection of 160`}'Avenue SE and SE 144`t' Street),within either tbe pipe or roadway. 2-10 SE l44'''Street-June 200? __ _ i -- --I-- -�----�--------�--- � � ' I 1 � C Legend � (�-- -- -- ---_--_--� � j--�____ �,� ; i� ; --I--- I j , --� , f _�.'_ � N ,; j___—_—___� i ' � } � i � �'� � m 0 R/D � I ! I I � L ! ! ! ! � � � i � ; \ �. m � ----- . � rn �--------; --_ ---_� i � 1—'�_ � \ �:` � � � � Basin Bounda ---- -�---- . �---------� rY � i � � - . - , —'� ; ��'j�' Flood Flow Path ; j � - ��-- ! + � I \ �`:\ �c-soo --' ~^-_-__-__ _ -- - - - - , � , ;- -i I _ i � \ ---- --- --- -- ' I c »o � -- _ � ' ��� � � � TYPe 2 CB � � � t- --� I ' � �:\ j � � . .--. I I I I I ` •\ N N �_ TYPe 1 CB -, ----- � � ' � _ _ �, � � � i i . __ �`� � � c-31 � "� --- - 12-18" Pipe/Culvert � , - ,- . — '�` c-2�o ; j � j__ ---- i I � -- �'''� ' • � 24" Pipe/Culvert ----� i � � — ! ��`..�� � � LL __— I = ' , i � ; a��i. — — _ —�:� ------ -- � _ c-�o Basin ID �--- - � � ' i I —� � Q `��� � �� W $ __ � i ' � LLI � � I � �`„'\• ' �. = o � � ` p� '•\ c � � %�` �I ! > _ I __ I I �I '` ` \ � a m j � ,�;/ � Q � � -- -} �1-- .`:, \ � � s` --- �/ 1 '� ' ' � ; _ \ �n t � , ; � � c � �` �\ tC� . i i � � . •� ; r �'� S'i °¢ . , , \ � j � � �\ , ` , I _�1 ,, �. � ------- ------- ; 1 ' — •;1 �'� 1 ,1 1 �y � -------- /,�._— i � �I _T'�._.._.�.. i ......�---'----_i._..._..._ I i i 1 �/ i / � , i i -- � 1 ,��� �' � � I --�� +'; ( ;� i � � a��i --- ; �� i � ----__.. ---.✓/ i I _i-$E_-14�nq%p t' ; % / _ ` I ` LL � � — - - ---- ' _L � 1 � /i j 1 i ---.--- -�--- —-- C-44 "Y � �`1�`�� _ � C2001 1 i �-� f �" � � i � I _--_ ! � -----r; , �� I j" � � � � � � � i , � � ' � � t � ! ! � �� O /` � �--;+ � ' I I I � � —_____; , � � ' I I N ' � � �� CB-4B�'-!=� �£8=4�= i i. � �, � C-106 � j i � : I i j , ; � � -- I _ I � i ; I y ; . � ; T ��' � � , , �, , �- . � ; � Ii � �� i LC_1UD_ -' I - I j( � , ' -- __��_._--- /`�-- G52 , ' � '�; ` ' � . I !: ,' , I r ; I; �� ! Likely Flood Area . i � ; � � '', � � , � � I � � I and Flowpath � � ! ' � � : '' l I CQ-4A ' I � - - --- - --..___. � � ' j ' �- � � ` �� � � ' � -- � � � I j � rC_`,J `` I � �: � ; , ; � j � i P - - --i ' � -�-�-- - - — i '' �:. ' � ' ' � I I �-- i =_ �- I � ' c�-� cg-2 _ �� � ' �I /,!�% � ' � ����� c�z ' ' � � � ; i ; � ; � �, c6 s ; I �� E I � t � � � ! � - � - --------- -------------._�------• � � -�_- /�_ _/ ," -- ---- &11D � ! CB-15A� I � ' � � � � � -- r""_' --- - - ------- � �-� ' ' �; >, _�.:�-+ �H-�--i ��-]OA C&11A �116 i � � , / -�-�'---- --- ' , � -- _ --�--�-_ _ --C6=11 C_ �CB-15A=L_ I I � , � �, c , ��.� _ , : �y�, , ' ,, , �-�---�.r-='• \�--�- ---- i -- -_ -�_- ---/ �_!_�t!�1////�I.._.. _�. _.T� - -- -- - - - --- �- --- (n C � . , , �- Q '. I , i'_-�--,--��--��. � p { , Ci6-4 �, i �- : _.-_ - • _ � � '� � - _..:_ C6-14 � `' C&G � CB�'-- -- - _ -- a, rn , ' _ � i ' i . CB-7� , � CB-9 � : i' i-- -�-r-----------•---.- _--_ -----•-- - v m ----- --�-=- ------�•--------•--�--- ---•- :.. CB 18A , : C-10 !`�---!- � -'-- -- - � - � -------- _--- , -: -- ---- - - -------- � c __.�_ ' _—I-- I ^ � � - —� ------------------=- � c t C&10 !C&11 i : I � , �--- ' C6�12 C&13 C�-14 CB-15 C&16 �_ �" -- --- u, � \�, ( 1 � i � -_ � _ r T--._ ; : i ; , � ' C&17 ;C&18 � C&19 � � ca •� � ���; /"�_ � —�_� � G20 f � -� C-�( � � � � �, C-40 ; � S� '�44th St,' �, G50 �� ---— ' ;' > � 3 ,S�� \ :� � �� � -��— ', L' � �� � ' 1 � — -� � � � - � � � -i � -i-- � � � �� ' �� � � j �' r � � � O ��,��\ � _� i i J i - � _ -; % ,' � 7 �� (� .. o '�.� � � � � � � � �� f' ;_ , � U _� � �; m �'� ��\ \�\ ` � i I � ; l---�— � i I � � � � / ,.?.�,�\ Z L Y I I / / � �+ � \ � ' \.,, _—� � ---� i I �____—� ' � _ ,� %�;—___� ,`' , � � � � , ` � � �---I i —�--� I �-- � � , ,I i / �} r W � � � � r �.--�-�----�-- , . , � � ----- � i � i� J_" _ _��` y cwn , ; � -- ---- -- � � j � i----- : ----- --, � ' , � ' _ . , , : : , , , . - - i i B-46 ' i , : I � Option 1 - Conveyance ------� 1 � ; ; } , - _ ; ,\ � , �� . .-���� � i , .. ,. ' � i � \ I ' ea=ae- .—_-----------L---� � ; , : ! , ^ a � __ ----�---- - - ---� , w � � w ! � i (� � � m ---- ------ (n - �- �___� -�_ 'N i- , -�------- -- --- -- __ _ - _ -- - - - -- � � I ,: � �----r----- ---- - --- � � 3 (n j � ._ � � � � � � � � � I� i� p � ' a� , ' � � _ _ � �Q u. !J � , °' � ;' , ,,; � �� � � � ;dl� ��'. —�-----1-----=-------.___� i � — -- _ . ----- `... _ j �.: �.. ' i `' , CB-4A Q �-- ---!i�-��_ � � � . � ---___!_ 18"Conve ance F_ i � : _ _ i ` Ditch/Culvert !N ' '... �; I , � � ; , I P�pe y � � __ _ � Upgrades •.��-, . C�-1 CB-2 CB-3 ' �' ' i � � , � I ' � � � � � ,,', � � _ -- ! ' -- -- ----- - _ � I CB-11 D CB-15A, � ! , � � _ _ _ ___.________. CB-5 ____ N __ __- ----- ____ `r-;; - - - � ---------r-.---- - - - - - - CB-11 C _ -,�, � � , : N ' .__..._.1 ..__._... • -_ _ _ _ " _ � � I � ..l ' ___ '_'. __' ._ .. ..._. .. . . . ...... . ... - - _ . N N , . - ..._. _._'._. , � � � '-L� � �� , �� , .. , .- _ ._ ... . .._ . __. .__ . - __... _...__. ._.__.' .._ _ . _ ti � C B-4 _ _ - -- __- __- _ - — --- r � CB 18A -- -- -- _I - _ . _ - SE �\,,.> ! =8- - _ -- -- -- � J��x`t L --- T ; CB-6i C6-9 CB-10 CB-11 CB,+12 CB-13 CB-14 CB-1$ CB-16 144th St g " __ - -- � ,� ,� `-t- CB-7 CB . `\ ��� �C. -17 CB-18 '; CB-19 - �\�\�\V - � � � , ' ! , � � � � � � � ; ' ; _ , __ �_ ___ .._ - -- - -- - ' . , - -_ _ __ _ _ - _ ; � , • � � � � :_ _ i � ! � __ � __ _ �-- - - , , _- - , �, - -- � 0 w� � CB-46 . ' _ r' CB=4£' ' ' ' ' i _ __ _ ____ � = m _ __ . _ __ _ _ : _ , � � _ _ _--- ---- � � _ ___ _ - - -- _ ', . � ._ _ ; ., � i Q � : ' _ ------- -- - :--- -- ---------- ,� � _ --- - --- - - ---- � � ___--T----;— -- -- - �__--- �-- --- i , ; �� ; � o � � I i :� i jf ,n � Option 2 - Conveyance/lnfiltration ; i i � � � i ��';�- � . � �__ ' ;� ',, ; �, ;� � �- Infiltration , , � -_- � \ `� --- _, :¢ %� ,__, . I -1 ' --- ---------1--_ Pond _T � T P8°e onveyance Q ' -- -J . �� ��� �;• , � � , � _- - --� � � � 2,�Overflow ! P ----- ----r i Ditch/Culvert � � _ , � CB-1 CB-2 CB-3 li � Pipe � ' , ` i � '' I � Upgrades � � a� � '�--- -- --._._ ----- - ` I ! , �B-11 D r ' CB-15AI , � ! LL -- - - -�fl-5-_1�--- _ __ __ - -- _-- --_-�_--- ____ C6-1 _ ____------____. 1C _ _ _- - , --- -- ? CB-4 ' _ --- ------ --- __ .--- ___ __ _ _ ❑ , , , ------ -- -- i ,_ ; I -T--, ,-- -- _ _ -- -- . CB-18A -- -- ; � � - -- --- _ - --- — o , iC6-7, CB-9 � C6-12 ------ , ; I - - -I _ -- �\��\� \ i �� � i CB=8--- � CB-10 ,,, CB-11 ,, i �CB-1 CH�-14 CB-1� --CB-16 SE 144th �t ; -- - -_ __=__-_- == N � CB$' --- - `'�\\\` � -� � I I � -- -- —_.� I ; � � ; ' CB-17 CB 18 �_ � G�`B-19 � _—� I - I i � ' , .. , , ; . . > �-----_- �-- —� � + + ---- � , ; , ' I I J ___ _ , : ' � �� — -- , : I I -- �'r � j - - - - -- --- - - - -- — ---- ' , _------ -- - �� - I 1 L � _' i i � �, �� � � � � I %'- � � , � : : i I � � --_—I � i � i i j � i i ----- — i ��� j `j Option 3 - Bioretention � , � , � : s-aB , -e��-- �� � �__ ; ; i � ; ' ` \ i --� � � � � �_..�, � I i � ' �w � . c ��, '� � �� ` �� � !,1_�_____—�- i _ , A :�' ' c � � . i__ __- i 1 I ._ ' I � i � C C ---� _--.i i w� � ` . � � i� Q � J _--, W � \ � , I i �, '� � � �, � �Y/' %� � � � �,, , - �� �((� � ,m Bioretention ;18"Dia. � I I ,.\ 3� _{ !¢ I ;' � L �;, , CB-4A � �� Cells-Native Plants Culverts ' I � '.,\ I �i , i�.�:�� p Q � ; k, > and OverFlow � -L�- �--__ _L_ �� � `,\ i i � Q � I � _ I� I � , � � - - � o � � � \, � CB 1 CB 2 CB-3 ( � ' � � � � i '� CB- CB-11D � CB-15A� ' I ' � � - � U --- -- - � - --3'�- --_ _ - - 11 C B- -1 � ( - i � � � : _ - cn = ,, ; ; I ^ - _--. - _ - -_- _- � _ �- C B-� —,---I ^ � _- --_ -- C B-18A --- --- 4; � Y � °�' , ; CB , C6-7! C6=8---' , 'CB-9 �'- I ; I -- N � t _ 1 - � _, _ C& 0 CB 11 � , .' - I CB=12 B-1 . , C - CB-1 CB-16 I i � CB 15 ' �� ��, � � � � I - � � _ � �, I � � � � �� � � SE 144th S�t � �tCB-17 �CB-18 �� �B-19 % � w , , � �_ � i � 1 _ -- , , � i , _ � . �_ - , , , � Similar to the pipe system on the south side of the road, the possibility of including sections of perforated pipe embedded in drain rock on the north side of the road should be investigated. Issues such as the impact of infiltrated water on the structural integrity of the road base and surrounding properties should be evaluated by a geotechnical engineer. 3.3 Offsite Conveyance Improvements/Infiltration As with Option 1,offsite mitigation Option 2 would include improving the conveyance system along the north side of SE 144`h Street. Between 162°d Avenue SE and 160`t'Avenue SE this , would entail upsizing driveway culverts and re-grading and cleaning open sections of the '' existing roadside ditch. From 160`h Avenue SE, an 18-inch diameter storm pipe would be �, constructed to convey stormwater to an infiltration pond located about 600 feet west of 160`h ' Avenue SE. An overflow structure from the pond would tie into tbe existing 18-inch diameter ' storm pipe on the south side of SE 144`�' Street. ' The proposed location of the infiltration pond is a large lot with a smaller single-family residential structure on it. The lot could perhaps be subdivided with the vacant tract being purchased by the County. The pond site is likely within the current flood flow path of larger ' storms (Figure 5). The infiltration characteristics of the pond site are likely favorable, as has been noted with the successful operation of the pond at Carolwood for several years. The infiltration pond would take advantage of the high infiltration rates of the underlying outwash soils and would reduce the flow rates to the storm pipe downstream from the pond. Environmental benefits of the system would include improving water quality and increasing groundwater recharge to the benefit of down gradient tributaries of the Cedar River. 3.4 Bioretention along SE 144tb Street Of�'site mitigation Option 3 would entail constructing bioretention swales within the right-of-way along the north side of SE 144th Street(Figure 6). Bioretention is a commonly applied low impact development(LID) strategy that has also been used with great success in improving roadway drainage in established neighborhoods. Seattle's Soft Edge Alternative streets (SEA- streets)have been shown to substantially reduce stormwater runoff and improve neighborhood ' aesthetics. ' To manage stormwater runoff along SE 144`h Street, a series of bioretention cells would be constructed in place of the existing nortberly ditch and culvert system. Each bioretention system would be configured with an engineered soil media, a gravel infiltration trench, an overflow control, and a conveyance pipe/driveway culvert linking the cells together. In addition, each cell ', would be landscape with native plants. i The bioretention cells would take advantage of the high infiltration rates of the underlying I outwash soils and would also increase conveyance capacity for higher flow rates. Environmental benefits of the system would include improving water quality and increasing groundwater 3-3 SE]44`''Street—Jtene 2007 recharge to the benefit of down gradient tributaries of the Cedar River. In addition, the bioretention cells would improve the aesthetics of the neighborhood and also provide shade. Disadvantages of the bioretention system would include disrupting existing landscaping of property owners and reducing street parking. 3-4 SE 144`"Sneei—June�00? 4. KEY RESULTS AND RECOMMENDATIONS 4.1 Key Results The following conclusions can be drawn based on the hydrologic and hydraulic analysis conducted for the conveyance system along SE 144�h Street presented in the preceding sections of this report: ■ The three proposed developments (Threadgill Plat, Liberty Gardens, and Cavella) collectively represent 10 percent of the study area basin. ■ While calculations presented in this report suggest that the conveyance system along SE 144`k' Street is undersized, there are no drainage complaints on record that support this. Physical evidence of flooding has been documented at the intersecrion of 162"d Avenue SE and SE 144`h. Drainage improvements have also recently been constructed by King County Roads Division at the intersection of 160`h Avenue SE and SE 144`h Street, likely in attempt to collect overflow from the catch basins at that location. ■ The 18-inch diameter pipe along SE 144`�' Street has a capacity of 4 to 6 cubic feet per second. The roadway and ditch system along the north side of the road convey the majority of higher flows. ■ HEC-RAS analysis of the roadway conveyance system for the 100-year peak rate indicates that the ditch system between 162"d Avenue SE and 160`�'Avenue SE has adequate capacity to convey the 100-year peak rate. However,driveway culverts along , this reach would be overtopped. ■ Flows with return periods of 2 to 5 years likely surcharge the 18-inch diameter pipe I system and flood the intersection of 160�'Avenue SE and SE 144`h Street. Overflow from ; the catch basins is likely conveyed in the roadway until it reaches a low lying area located north of CB 9. Depending upon the magnitude of flows, the floodwater either infiltrates at this location outside the road right-of-�vay or continues to flow to the Carolwood infiltration pond. ■ Four flood mitigation concepts �i�ere presented and discussed including increased onsite detention and three offsite mitigation options. 4.2 Recommendations Any one of the four proposed drainage mitigations would adequately meet the intent of the King County Surface Water Design Manual(January 2Q05)Core Requirements. Offsite mitigation Options 2 and 3 would provide the most benefit to the downstream system in terms of stormwater management and environmental advantages. While onsite stormwater mitigation would perhaps the easiest and least expensive option to implement, the downstream flooding problem would not be solved. 4-1 SE 144"Street—J:nie 2007 Implementing the offsite mitigations would requue King County's leadership, and even ownership of the project. This would be especially true for offsite Options 2 and 3,where a vacant parcel would need to be acquired(for Option 2) or the right-of-way would need to be substantially re-graded(for Option 3). For any of the offsite options to be adopted, the County would need to see value in solving drainage problems along SE 144`h Street and in the environmental benefits provided by these designs. Providing bioretention through SEA-streets and the like, to solve existing and potential future drainage problems, should be a consideration for the County. To my knowledge, the County has not implemented a project similar to Option 3, and this would be a suitably-scaled pilot project. For these offsite options to be implemented, each developer would likely make a fair and reasonable contribution to the project. The County would be responsible for designing and implementing the project. I 4-2 sE 14�t"so-eer—June 2o0i 5. REFERENCES Baima &Holmberg, Inc. and Ed McCarthy, PE, PS. November 18, 2005.Level l Downstream Drainage Analysis for Threadgill Plat. Issaquah,Wash. Barghausen Consulting Engineers,June 2003.Hamilton Place- Technical lnformation Report. Kent,Wash. Daley-Morrow-Poblete,Inc., February 2003.Liberty Grove- Technical lnformation Report. French, Richard, H., 1985. Open-Channel Hydraulics. McGraw-Hill Book Company.New York. Haozous Engineering,PS. May 2003.Nichol's Place-Preliminary Technicallnformation Report. Mukilteo, Wash. Haozous Engineering,PS. June 15, 2001. Evende/1 Plat-Preliminary Technical Information Report. DDES File No. L98P0047. Renton, Wash. King County Department of Natural Resources, 1997. Lower Cedar River Basin and Nonpoint Polh�tion Action Plan. Seattle. King County Department of Natural Resources, 1993. Ctrrrent & Future Conditrons Report for the Cedar River. Seattle. King County Department of Parks, Planning,and Resources, 1990. Sensitive Areas Map Folio. Seattle. King Count�Department of Public Works, January 18, 1984. SE 144'h Street— 156`h Ave. SE to 164' PI SE. Sheets 1 — 8. Seattle. King County Department of Public Works, June 23, 1997. 154`h Place SE Slope Stabilization Project. Sheets 1 — 13. Seattle. King County Department of Natural Resources, January 2005. King County Surface Water Design Manual. Seattle. U.S. Department of Agriculture, Soil Conservation Service, 1973. Soil Survey of King Counry Area, Washington. 5-1 SE 144`''Streer—Jurre 2007 Appendices Appendix A. Photographs of the Downstream System Appendix B. KCRTS Documentation for Contributing Basins Appendix C. XP-SWMM Modei Results Appendix D. HEC-RAS Analysis of Roadway Conveyance SE l44''Street-J�me 200? Appendix A. Photographs of the Downstream System SE 14d"Street-June 2007 Appendix A: Photos of the Downstream System ♦ Photo Number 1 ♦ Photo Number 2 Date of Photo: 1-11-06 Source: Dave Peh-ie Date of Photo: 1-21-06 Source: Dave Petrie Location: South of CB 18A, lookin north. Location: North of CB 18A, lookin south. Description: Overflowing pond during height of rainstorm. Description: Pond north of SE 144 Street within the 162 Water is flowing to the roadside ditch on the right-of-way during a light storm. north side of SE 144�' Street. , . . � • ,:;:� .� � J+' - . R h\,t' : � �. r 'x ,,,r.., _ _ + ��' , ' � �. . t ,. _•.,,,.1s _ � _ i,, � w� ^ •*� ����` ��� � , .. I ,�, - ,. .��, f . :� tr y ' ,r.�. *"':i'� ' -+..� ,�'y�'1,. "4r' ' . .. �t.s * 1 -�`.,��'� �t �4�'� _—.-. -�- .. � � w�'- ;� � � y-.. ;» "w ., ry A � � ;... �r -S : ''`�r�` � ��, -�4'.�e�"���;�+T�f �' � �x� . �,.: ,�3r;�`' . _ . - ,� `�' �r�w:�,�!*� _ '`':�` , K y1�/�-l ♦ �. �� J�. � � ��h : '�`.$ �y,y...q.^Y'YSLISA��� �*Yr.� yRr .:t� s . : ry"�. � � 'l^ R��.�� . .'/4 ' ' ..i .� J. "� ^+�'}. Rr�p�.. ' , ��� � � :f� �. .��� • �� .-ti' M . ��2 r ,r.�,. 3s . '�' , . "r' .`!-.�I��` � � �T�. I . "�-.1 1I `�...^�� � *' � ��/'�R -"� . " _ �+r.� ,� `"�'� ���`i��..'�,^ .,�::"9�{�-~V"�l�~ir � •�� � +" f i�' ti;, + , . • a•.'4:�+,•.�F �"}' �`�'r": > ., . ���� :�a�. ,'..�y,� ��- . `������^� �4".."M"+�e� , `'w ..c,y rf • � ��' 6 - ,i �iM` � •.�'"°r � ti ����• i.,3-``��"*� '� h �'. Vt..-. ::.Jea'' `.i3Aa. � ��- �:"`!!� . Appendix B. KCRTS Documentation for Contributing Basins Appendix B.1 KCRTS Time Series Calculations Appendix B.2 KCRTS Pond Designs Appendix B.3 KCRTS Peak Flow Rates B-1 SF.144''Street—Jurre 2007 Appendix B.1. KCRTS Time Series Calculations KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-l0.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Ovtwash Pasture 0.16 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 0.29 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 0.08 acres -------------- Total Area : 0.53 acres Peak Discharge: O.Oil CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-l0.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-l0.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-l0.tsf Mean= -1.641 StdDev= 0.141 Project Location:Sea-Tac Skew= 1.196 Frequencies & Peaks saved to File:c-l0.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-l0.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-l0.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series B-2 SE 144`"Stree(-June 2007 Project Location : Sea-Tac Computing Series : c-20.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.30 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 1.05 acres Loading Time Ser�es File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.51 acres -------------- Total Area : 1.86 acres Peak Discharge: 0.331 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-20.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-20.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-20.tsf Mean= -0.857 StdDev= 0.119 Project Location:Sea-Tac Skew= 0.941 Frequencies & Peaks savec tc File:c-20.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-20.tsf . Computing Interval Locations Computing Flow Durations Duraticns & Exceedence Probabil�ties to File:c-20.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu KCRTS Command CREATE a new Time Series ------------------------ Production of Runo�_` Time Series Project Location : Sea-Tac Computing Series : c-30.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.31 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . B-3 SE 144'"Street-June 2007 Ou�wash Grass 0.91 acres Loading Time Series File:C:\KC SG7DM�KC D�TF.�,`�TEIFCH.�nf . Impervious 0.41 acres -------------- Total Area : 1.63 acres Peak Discharge: 0.276 CFS at 16:00 on Mar 3 in 19�� Storinq Time Series rile:c-3C.tsf . Time Series Computed KCRTS Commanc Enter the Analysis TOOLS "-]o���le ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-30.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-30.tsf Mean= -0.999 StdDev= 0. 121 Project Location:Sea-Tac Skew= 0.973 Frequencies & Peaks saved to File:c-30.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-30.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-30.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-40.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STCG6CH.rnf . Outwash Grass 0.26 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.30 acres -------------- Total Area : 0.56 acres Peak Discharge: 0.195 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-90.tsf . Time Series Computed KCRTS Command B-4 SE 144*Street-June 700? Enter the Analysis TOOLS Module ' ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-90.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-90.tsf Mean= -1.104 StdDev= 0.105 Project Location:Sea-Tac Skew= 0.664 Frequencies & Peaks saved to File:c-40.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-40.tsf _ Ccmputing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-40.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-42.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.03 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 0.96 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.67 acres -------------- Total Area : 1.66 acres Peak Discharge: 0.373 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-42.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Cempute PEAKS and Flow Frequencies ---------------------------------- B-S SE 144"Street—June 2007 Loading Stage/Discharge curve:c-92.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-42.tsf Mean= -0.747 StdDev= 0.110 Project Location:Sea-Tac Skew= 0.794 Frequencies & Peaks saved to File:c-42.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-42.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-42.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-44.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.99 acres -------------- Total Area : 0.99 acres I Peak Discharge: 0.908 CFS at 0:00 on Oct 6 in 1981 Storing Time Series File:c-99.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-99.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-44.tsf Mean= -0.596 StdDev= 0.096 Project Location:Sea-Tac Skew= 0.562 Frequencies & Peaks saved to File:c-44.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-49.tsf . B-6 SE 144'a Street—June 1007 Compnting Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-44.dur . Analysis Tools Command RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series —--------------------- Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-50.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.51 acres -------------- Total Area : 0.51 acres Peak Discharge: 0.210 CFS at 0:00 on Oct 6 in 1981 Storing Time Series File:c-50.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- � Loading Stage/Discharge curve:c-50.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-50.tsf Mean= -0.884 StdDev= 0.095 Project Location:Sea-Tac Skew= 0.562 Frequencies & Peaks saved to File:c-50.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-50.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-50.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series B-7 SE l44'''Street-June 2007 ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-52.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.01 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 0.80 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.01 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 0.80 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 1.15 acres Total Area : 2.77 acres Peak Discharge: 0.701 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-52.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-52.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-52.tsf Mean= -0.457 StdDev= 0.118 I Project Location:Sea-Tac Skew= 0.538 Frequencies & Peaks saved to File:c-52.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-52.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-52.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu KCRTS Command CREATE a new Time Series ------------------------ Production of RUnoff Time Series Project Location : Sea-Tac Computing Series : c-59.tsf B-8 SE 144""Street-Jurre 2007 Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 0.03 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60A.rnf . Till Pasture 0.03 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 0.83 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOF60H.rnf . Outwash Forest 0.04 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOP60A.rnf . Outwash Pasture 0.04 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 1.29 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 1.44 acres -------------- Total Area : 3.65 acres Peak Discharge: 0.876 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-54.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-54.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-54.tsf Mean= -0.367 StdDev= 0.117 I Project Location:Sea-Tac Skew= 0.588 Frequencies & Peaks saved to File:c-54.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-54 .tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-54 .dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-60.tsf B-9 I SE!44'"Street—Jurre 2007 Reg:onal Scale Factcr : 1 .00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC S'r�Lht\KC DATr\STE160H.rnf . Impervious 0.52 acres -------------- Total Area : 0.52 acres Peak Discharge: 0.214 CFS at 0:00 on Cct E in 19a1 Storing Tirne Series File:c-EC.tsf. . Time Series Computed KCRTS Command Enter the Analys�s TOOLS .•10�1,�1e �-nalys-s Tools �cmrr�and ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-60.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-60.tsf Mean= -0.876 StdDev= 0.096 Project Location:Sea-Tac Skew= 0.561 Frequencies & Peaks saved to File:c-60.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Load'_nc Time �er'_es Fi1c�:c-6C .tsf . Computing Interval Locations Computing Flow Durations Duratic:�s s �xceedence Probab:li'.ies �r Fil��:c-EO .dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Producticn of Runoff Time Series Project Location : Sea-Tac Computing Series : c-70.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWL'M\KC DATA\STTP60H.rnF . Till Pasture 0.51 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 1.70 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.39 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 1.13 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . 8-10 sE�a�"sr.eer—✓u„e Zon% Impervious 1.34 acres -------------- Total Area : 5.02 acres Peak Discharge: 1.06 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-70.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Mcdule ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-70.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-70.tsf Mean= -0.327 StdDev= 0.133 Project Location:Sea-Tac Skew= 0.509 Frequencies & Peaks saved to File:c-70.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Lcading Time Series File:c-70.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabil�ties to File:c-70.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-80.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf _ Till Forest 5.28 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.12 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 4.35 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOF60H.rnf . Outwash Forest 0.59 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOP60H.rnf . Outwash Pasture 0.01 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 0.48 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . B-11 ' SE 144`''Sneet-June 200 i Impervious 3.40 acres -------------- Total Area : 19.23 acres Peak Discharge: 2.61 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-80.tsf . Time Series Computed KCRTS Command ------------- � Enter the Analysis TOOLS Module I Analysis Tools Command ---------------------- Ccmpute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-80.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- T�me Series File:c-80.tsf Mean= 0.090 StdDev= 0.131 Pro;ect Location:Sea-Tac Skew= 0.500 Frequencies & Peaks saved to File:c-80.pks . Analysis Tools Command ---------------------- Ccmp��te Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-80.tsf . �omputinc Interval Locations CompUtina Flow Durations Durations & Exceedence Probabilities to File:c-80.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-90.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series FilecC:\KC SWDM\KC DATA\STEI60H.rnf . Impervicus 0.40 acres Total Area : 0.90 acres Peak Discharge: 0.165 CFS at 0:00 on Oct 6 in 1981 Storing Time Series File:c-90.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- B-12 SE 14-1'"Sn ee!—Jmre 200% Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-90.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-90.tsf Mean= -0. 989 StdDev= 0.096 Project Location:Sea-Tac Skew= 0.559 Frequencies & Peaks saved to File:c-90.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading T�me Series File:c-�O .tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Prcbab'lities to File:c-90.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-100.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C: \KC SWDM\KC DATA\STTF60H.rnf . Till Forest 0.95 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.33 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 0.61 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 0.17 acres -------------- Total Area : 1.56 acres Peak Discharge: 0.250 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-100.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharce curve:c-100.tsf . Flow Frequency Analysis LogPearson III Coefficients B-13 SE 14�'Street—June 2(Xl% -------------------------------------------------------- Time Series File:c-100.tsf Mean= -1.001 StdDev= 0.167 Project Location:Sea-Tac Skew= 0.401 Frequencies & Peaks saved to File:c-100.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-100.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-100.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-106.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 2.50 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.12 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 3.34 acres Loading Time Series File:C:\KC_SWDM\KC_DATA\STOP60H.rnf . � Outwash Pasture 0.12 acres Loading Time Series File:C:\KC SWDM\KC DATA\STOG60H.rnf . Outwash Grass 3.39 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 4.64 acres -------------- Total Area : 14.06 acres Peak Discharge: 3.02 CFS at 16:00 on Mar 3 in 1950 Storing Time Series File:c-106.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-106.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-106.tsf Mean= 0.169 StdDev= 0.122 B-14 SE 144"Smeet—June 7007 Project Location:Sea-Tac Skew= 0.511 Frequencies & Peaks saved to File:c-106.pks . �, Analysis Tools Command II, ---------------------- Compute Flow DURATION and Exceedence ' -----------------—----------------- Loading Time Series File:c-106.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-106.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CR�ATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-110.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 6.43 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 12.24 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 12.33 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 7.10 acres -------------- Total Area : 38.10 acres Peak Discharge: 6. 91 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-110.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-110.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-110.tsf Mean= 0.987 StdDev= 0.145 Project Location:Sea-Tac Skew= 0.984 Frequencies & Peaks saved to File:c-110.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence B-IS SE 144�'Street-June 1007 ------------------------------------ Loading Time Series File:c-110.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-110.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu -----------——------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-120.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.58 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 1.00 acres -------------- Total Area : 1.58 acres Peak Discharge: 0.466 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-120.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ----------------------- ----- I Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-120.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-120.tsf Mean= -0.565 StdDev= 0.101 Project Location:Sea-Tac Skew= 0.475 Frequencies & Peaks saved to File:c-120.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-120.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-120.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- B-16 ' SE 144"Street-June 100? ' KCRTS Command CREATE a new Time Series Production of Runoff Time Series Project Location : Sea-Tac ' Computing Series : c-130.tsf Regional 5cale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 2.49 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 7.12 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 5.80 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 1.58 acres -------------- Total Area : 16.99 acres Peak Discharge: 2.69 CFS at 16:00 on yar 3 in 1950 Storing Time Series File:c-130.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharce curve:c-130.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-130.tsf Mean= 0.015 StdDev= 0. 1?5 Project Location:Sea-Tac Skew= 0.324 Frequencies & Peaks saved to File:c-130.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-130.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-130.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series B-1? SE l44'"Street-J:me 100? Prcject Location : Sea-Tac Computing Series : c-200.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 9.45 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.19 acres Loading Time Series File:C:\KC_SWDM\KC_DATA\STTG60H.rnf . Till Grass 1.79 acres I Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . �i Impervious 1.18 acres ' Total Area : 7.56 acres Peak Discharge: 1.12 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-200.tsf . Time Series CompUted KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-200.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-200.tsf Mean= -0.308 StdDev= 0.195 Project Location:Sea-Tac Skew= 0.500 Frequencies & Peaks saved to File:c-200.pks . Analysis Tools Command , ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-200.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-200.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-210.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . B-18 SE 144`"Street-June 2007 Till Forest 3.31 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 1.70 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 4.60 acres Loading Time 5eries File:C:\KC SWDM\KC DATA\STE16CH.rnf . Impervious 2.93 acres -------------- Total Area : 12.59 acres Peak Discharge: 2.47 CFS at 6:00 cn Jan 9 in 1990 Storing Time Series File:c-210.tsf . Time Series Computed KCRTS Command Enter the Analysis TOO:.S Module Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-210.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-210.tsf Mean= 0.056 StdDev= 0.136 Project Location:Sea-Tac Skew= 0.982 Frequencies & Peaks saved to File:c-210.pks . Analysis Tools Command Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-210.tsf . Computing Interval Locations Computing Flow Durations � Durations & Exceedence Probabilities to File:c-210.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-220.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf _ Till Grass 1.56 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 1.90 acres Total Area : 3.46 acres Peak Discharge: 1.09 CFS at 6:00 on Jan 9 in 199G B-19 SE 144`"Street—June 2007 Storing Time Series File:c-220.tsf . Time Series Computed KCRTS Command EnLer the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-220.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Se�ies File:c-220.tsf Mean= -0.235 StdDev= 0.119 �roject Lccation:Sea-Tac Skew= 0.400 Frequencies & Peaks saved to File:c-220.pks . Analvsis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-220.tsf . Compu�ing Interval Locations Ccrnputing Flow Durations Durations & Exceedence Probabilities to File:c-220.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series � ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-230.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 3.95 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 5.71 acres -------------- Total Area : 9.66 acres Peak Discharge: 2.72 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-230.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module " ------------------------------- Analysis Tools Command ---------------------- B-20 SE 144�'Street—June 7007 Cempute F�AKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-230.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-230.tsf Mean= 0.197 StdDev= 0.103 Project Location:Sea-Tac Skew= 0.961 Frequencies & Peaks saved to File:c-230.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ I,oadina Time Series File:c-230.tsf . Computing Interval Locations Computing Flow Durations Duraticns y =xceedence ?robabilit�es to r'ile:c-230.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runeff Time Se-ie� Project Location : Sea-Tac Computing Series : c-232.ts` Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:'•,KC SWDPd\KC DATA\STTF60H.rnf . Till Forest 1.38 acres -------------- Total Area : 1.38 acres Peak Discharge: 0.093 CFS at 9:00 on Jan 9 in 1990 Storing Time Series File:c-232.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS r9cdule ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-232 .tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-232.tsf Mean= -1.477 StdDev= 0.232 Project Location:Sea-Tac Skew= -0.129 Frequencies & Peaks saved to File:c-232.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceecence B-21 SE l4�'Slreel-June 1007 ------------------------------------ Lcad�na Time Series F,_le:c-232.tsf . Computing Interval Locatior,:=. Computing Flow Durations Durations 5 Exceeuence Y�obabilit�es tc F�le:c-232.dur . Analysis Tools Command RETURN to Previous ?Kenu KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-290.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 3.65 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 4.98 acres -------------- Total Area : 8.13 acres Peak Discharge: 2.56 CFS at 6:00 on �an 9 in 199C Storina Time 5e�-es =ile:c-�9u.�s= . Time Series Computed KCRTS Command Enter the Analysis TOOLS Mcdule Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequenc;es ---------------------------------- Loading Stage/Discharge curve:c-240.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-240.tsf Mean= 0.137 StdDev= 0.114 Project Location:Sea-Tac Skew= 0.402 Frequencies & Peaks saved to File:c-240.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-240.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-290.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- B-22 SE 14�'Street-Juue 2007 KCRTS Command CREATE a new Time Series ------------------------ Production of Runo�f Time Series Project Location : Sea-Tac Computing Series : c-241.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 0.23 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 2.99 acres Loading Time Series File:C: \KC Si4DM\KC DATA\STEI60H.rnf . Impervious 3.68 acres -------------- Total Area : 6.90 acres Peak Discharge: 2.12 CFS at 6:00 on Jan 9 in 1990 Stori�g Time Series File:c-241 .tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module Analysis Tccls Corunand ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-291 .tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-291.tsf Mean= 0.052 StdDev= 0.119 Project Location:Sea-Tac Skew= 0.403 Frequencies & Peaks saved to File:c-241 .pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-241.tsf . Computing Interval Locations Computing Flow Durations Durations � Exceedence Probabil=t�es tc File:c-241 .dur . Analysis Tools Command RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-249.tsf B-23 SE 144`''Stree!—June 2007 Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 0.71 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 11.96 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 10.75 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 4.68 acres -------------- Total Area : 27.60 acres Peak Discharge: 5.19 CFS at 6:00 cn �an 9 in 199D Stcring Ti�e Series File:c-244 .tsf . Time Series Compu�ed KCRTS Command Enrer the Analysis TOOLS Module ------------------------------- Analysis Tccls Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-299 .tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-299.tsf Mean= 0.350 StdDev= 0.151 Project Locatien:Sea-Tac Skew= 0.463 Frequencies & Peaks saved to File:c-244 .pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence � ------------------------------------ Loading Time Series File:c-294.tsf _ Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-294.dur . Analysis Tools Command ---------------------- RETURN to Previous P�Ienu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project �ocation : Sea-Tac Computing Series : c-250.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.17 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . B-14 SE 144�'Street-June 2007 Till Grass 4.66 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 3.23 acres Total Area : 8.06 acres Peak Discharge: 2.27 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-250.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- ' Loading Stage/Discharge curve:c-250.tsf . Flow Frequency Analysis LogPearson III Coe£ficients -------------------------------------------------------- Time Series File:c-250.tsf Mean= 0.048 StdDev= 0.126 Project Location:Sea-Tac Skew= 0.396 Frequencies & Peaks saved to File:c-250.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-250.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-250.dur . Analysis Tools Command --------------------- � RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-260.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 2.33 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 1.79 acres Total Area : 4.07 acres ' Peak Discharge: l.lfi CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-260.tsf . Time Series Computed I KCRTS Command I B-25 �I SE 144"'Street-June 1007 Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-260.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-260.tsf Mean= -0.230 StdDev= 0.129 Project Location:Sea-Tac Skew= 0.395 Frequencies & Peaks saved to File:c-260.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-260.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-260.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series Production of Runoff Time Series , Project Location : Sea-Tac I Computing Series : c-270.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 2.22 acres Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . Impervious 1.60 acres Total Area : 3.82 acres Peak Discharge: 1.10 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-270.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-270.tsf . Flow Frequency Analysis LogPearson III Coefficients B-26 SE 144"''Streel-June 2007 -------------------------------------------------------- Time Series File:c-270.tsf Mean= -0.263 StdDev= 0.125 Project Location:Sea-Tac Skew= 0.392 Frequencies & Peaks saved to File:c-270.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-270.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-270.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-300.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 9.47 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 1.73 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 4.13 acres I Loading Time Series File:C:\KC_SWDM\KC_DATA\STEI60H.rnf . Impervious 1.56 acres -------------- Total Area : 16.89 acres Peak Discharge: 2.19 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-300.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-300.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-300.tsf Mean= -0.057 StdDev= 0.172 Project Location:Sea-Tac Skew= 0.335 Frequencies & Peaks saved to File:c-300.pks . Analysis Tools Command B-17 SE 144�'Street-June 1007 Compute Flow DURATION and Exceedence I ------------------------------------ Loading Time Series File:c-300.tsf . Computing Interval Locations Computing Flow Durations Lvraticns & Exceedence Probab�lities to File:c-300.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computinq Series : c-309.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Houriy Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 2.12 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 1.36 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 5.73 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 3.79 acres -------------- Total Area : 12.95 acres Peak Discharge: 2 .93 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-?C9 .tsf . Time Series Computed I KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-304.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-304.tsf Mean= 0.191 StdDev= 0.132 Prcject Location:Sea-Tac Skew= 0.926 Frequencies & Peaks saved to File:c-304.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-304.tsf . Computing Interval Lccations Computing Flow Durations B-28 SE 144'"Street—June 2007 Durations & Exceedence Probabilities to File:c-304.dur . I, Analysis Tools Command I, RETURN to Previous Menu ' KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-306.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 1.25 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.15 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 0.28 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 0.08 acres -------------- Total Area : 1.76 acres Peak Discharge: 0.177 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-306.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-306.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-306.tsf Mean= -1.180 StdDev= 0.204 Project Location:Sea-Tac Skew= 0.091 Frequencies & Peaks saved to File:c-306.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-306.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-306.dur . Analysis Tools Command , ---------------------- � RETURN to Previous Menu � B-29 I!, SE 149`''Sbeet-June 2007 ' KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-310.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 9.32 acres Total Area : 9.32 acres Peak Discharge: 0.627 CFS at 9:00 on Jan 9 in 1990 Storing Time Series File:c-310.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-310.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- � Time Series File:c-310.tsf Mean= -0.648 StdDev= 0.233 II Project Location:Sea-Tac Skew= -0.139 ' Frequencies & Peaks saved to File:c-310.pks . I Analysis Tools Command i ---------------------- I Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-310.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-310.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-320.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STT�60i3.rnf . B-30 SE 144'�Street—Junz 100' Till Forest 8.92 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . Till Pasture 0.18 acres Loading Time Series File:C:\KC SWDM\KC DATA\STTG60H.rnf . Till Grass 0.33 acres Loading Time Series File:C:\KC SWDM\KC DATA\STE160H.rnf . Impervious 0.09 acres -------------- Total Area : 9.52 acres Peak Discharge: 0.693 CFS at 9:00 on Jan 9 in 1990 Storing Time Series File:c-320.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-320.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-320.tsf Mean= -0.597 StdDev= 0.226 Project Location:Sea-Tac Skew= -0.141 Frequencies & Peaks saved to File:c-320.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-320.tsf . CompUting Interval Locations Computing Flow Durations � Durations & Exceedence Probabilities to File:c-320.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- KCRTS Command CREATE a new Time Series ------------------------ Production of Runoff Time Series Project Location : Sea-Tac Computing Series : c-330.tsf Regional Scale Factor : 1.00 Data Type : Historic Creating Hourly Time Series File Loading Time Series File:C:\KC SWDM\KC DATA\STTF60H.rnf . Till Forest 1.37 acres ' Loading Time Series File:C:\KC SWDM\KC DATA\STTP60H.rnf . I Till Pasture 0.34 acres � Loading Time Series File:C:\KC_SWDM\KC_DATA\STTG60H.rnf . , Till Grass 0.62 acres � Loading Time Series File:C:\KC SWDM\KC DATA\STEI60H.rnf . B-31 SE 144'"Street-June 2007 Impervious 0.17 acres Total Area : 2.50 acres Peak Discharge: 0.307 CFS at 6:00 on Jan 9 in 1990 Storing Time Series File:c-330.tsf . Time Series Computed KCRTS Command Enter the Analysis TOOLS Module ------------------------------- Analysis Tools Command ---------------------- Compute PEAKS and Flow Frequencies ---------------------------------- Loading Stage/Discharge curve:c-330.tsf . Flow Frequency Analysis LogPearson III Coefficients -------------------------------------------------------- Time Series File:c-330.tsf Mean= -0.930 StdDev= 0.187 Project Location:Sea-Tac Skew= 0.198 Frequencies & Peaks saved to File:c-330.pks . Analysis Tools Command ---------------------- Compute Flow DURATION and Exceedence ------------------------------------ Loading Time Series File:c-330.tsf . Computing Interval Locations Computing Flow Durations Durations & Exceedence Probabilities to File:c-330.dur . Analysis Tools Command ---------------------- RETURN to Previous Menu ----------------------- I KCRTS Command eXit KCRTS Program ------------------ B-32 SE 144"Street—June 2007 Appendix B.2 KCRTS Pond Designs Hamilton Place - Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 3.00 H:1V Pond Bottom Length: 145.91 ft Pond Bottom Width: 71.63 ft Pond Bottom Area: 10452. sq. ft Top Area at 1 ft. FB: 19580. sq. ft 0.449 acres Effective Storage Depth: 5.00 ft Stage 0 Elevation: 505.00 ft Storage Volume: 70076. cu. ft 1.609 ac-ft Riser Head: 5.00 ft Riser Diameter: 12.00 inches Nur.�er of orifices: 2 Full Head Pipe Or_f�ce # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 1.26 0.096 2 2.90 1.70 0.114 9 .0 Top Notch Weir: None Outflow Rating Curve: None Evendell Plat - Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 3.00 H:1V Pond Bottom Length: 167.00 ft Pond Bottom Width: 58.00 ft ?ond Bottom Area: 9686. sq. ft Top Area at 1 ft. FB: 23762. sq. ft I 0.546 acres Effective Storage Depth: 7.50 ft Stage 0 Elevation: 452.00 ft Storage Volume: 115676. cu. ft 2.656 ac-ft Riser Head: 7.50 ft Riser Diameter: 18.00 inches Number of orifices: 3 Full Head Pipe Ori£ice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 1.50 0.167 2 5.50 2.30 0.203 6.0 3 5.90 2.80 0.269 6.0 Top Notch Weir: None Outflosa Rating Curve: None Liberty Grove - Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 2.00 H:1V Pond Bottom Length: 178.12 ft Pond Bottom Width: 89.06 ft B-33 SE 144`h Street-June 1007 Pond Bottom Area: 15863. sq. ft Top Area at 1 ft. FB: 29128. sq. ft 0.554 acres Effective Storage Depth: 6.00 ft Stage 0 Elevation: 456.00 ft Storage Volume: 115567. cu. ft 2.653 ac-ft Riser Head: 6.00 ft Riser Diameter: 18.00 inches Number of orifices: 3 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 3.31 0.728 2 3.65 4.39 0.801 8.0 3 4.81 7.69 1.799 10.0 Top Notch Weir: None Outflow Rating Curve: None Nichol's Place - Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 0.00 H:lV Pond Bottom Length: 82.00 ft Pond Bottom Width: 71.00 ft Pond Bottom Area: 5822, sq. ft Top Area at 1 ft. FB: 5822 . sq. ft 0.134 acres Effective Storage Depth: 5.00 ft Stage 0 Elevation: 447.00 ft Storage Volume: 29110. cu. ft 0.668 ac-ft Riser Head: 5.00 ft Riser Diameter: 18.00 inches Number of orifices: 2 I Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0.00 0.87 0.046 2 3.90 1.71 0.083 9.0 Top Notch Weir: Rectangular Length: 1.00 in Weir Height: 4.50 ft Outflow Rating Curve: None B-34 SE 144`"Street-June 2007 Appendix B.3 KCRTS Peak Flow Rates Flcw Frequency Analysis LogPearson III Coefficients Time Series File:c-l0.tsf Mean= -1. 641 StdDev= 0.141 Project Location:Sea-Tac Skew= 1.196 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS} Period 0.022 26 2/16/49 21:00 0.070 1 89.50 0.989 0.070 1 3/03/50 16:00 0.096 2 32.13 0.964 0.034 6 2/09/51 2:00 0.094 3 19.58 0.949 0.018 37 10/15/51 13:00 0.039 4 14.08 0.929 0.017 44 3/24/53 15:00 0.036 5 10.99 0.909 0.022 27 12/19/53 19:00 0.034 6 9.01 0.889 0.023 21 2/07/55 17:00 0.033 7 7.69 0.869 0.025 15 12/20/55 17:00 0.031 8 6.63 0.849 0.022 22 12/09/56 14:00 0.031 9 5.86 0.829 0.021 28 12/25/57 16:00 0.030 10 5.29 0.809 0.021 29 1/26/59 20:00 0.028 11 9.75 0.789 0.025 17 2/06/60 17:00 0.028 12 4.34 0.769 0.026 13 2/14/61 21:00 0.026 13 3.99 0.799 0.018 38 11/22/61 2:00 0.025 14 3.70 0.729 0.019 34 12/15/62 2:00 0.025 15 3.44 0.709 0.022 23 12/31/63 23:00 0.025 16 3.22 0.690 0.018 39 12/21/64 4:00 0.025 17 3.03 0.670 0.018 90 1/05/66 16:00 0.024 18 2.85 0.650 0.028 12 1/19/67 14:00 0.029 19 2.70 0.630 0.030 10 8/24/68 16:00 0.023 20 2.56 0.610 0.016 46 12/03/68 16:00 0.023 21 2.44 0.590 0.018 91 1/13/70 22:00 0.022 22 2.32 0.570 0.018 42 12/05/70 9:00 0.022 23 2.22 0.550 0.044 3 2/27/72 7:00 0.022 24 2.13 0.530 0.017 45 1/13/73 2:00 0.022 25 2.04 0.510 0.018 35 11/28/73 9:00 0.022 26 1.96 0.490 I 0.023 20 12/26/74 23:00 0.022 27 1.89 0.470 0.016 47 1/14/76 6:00 0.021 28 1.82 0.450 0.020 30 8/26/77 2:00 0.021 29 1.75 0.930 0.028 11 9/17/78 2:00 0.020 30 1.70 0.910 0.025 14 9/08/79 15:00 0.020 31 1.64 0.390 0.022 25 12/19/79 21:00 0.019 32 1.59 0.370 0.029 18 11/21/80 11:00 0.019 33 1.54 0.350 0.033 7 10/06/81 0:00 0.019 39 1.49 0.330 0.025 16 10/28/82 16:00 0.018 35 1.45 0.310 0.020 31 3/15/84 20:00 0.018 36 1.41 0.291 0.017 43 6/06/85 22:00 0.018 37 1.37 0.271 0.022 29 1/18/86 16:00 0.018 38 1.33 0.251 0.031 9 10/26/86 0:00 0.018 39 1.30 0.231 0.015 49 11/11/87 0:00 0.018 40 1.27 0.211 0.019 32 8/21/89 17:00 0.018 41 1.29 0.191 0.046 2 1/09/90 8:00 0.018 42 1.21 0.171 0.036 5 11/24/90 8:00 0.017 93 1.18 0.151 C.018 36 1/27/92 15:00 0.017 49 1.15 0.131 0.013 50 11/O1/92 16:00 0.017 95 1.12 0.111 0.015 48 11/30/93 22:00 0.016 46 1.10 0.091 0.019 33 11/30/94 4:00 0.016 47 1.08 0.071 0.039 4 2/08/96 10:00 0.015 48 1.05 0.051 0.031 8 1/02/97 6:00 0.015 49 1.03 0.031 0.024 19 10/04/97 15:00 0.013 50 1.01 0.011 B-3S SE 144`"Street-June7007 Computed Peaks 0.063 100.00 0.990 Computed Peaks 0.053 50.00 0.980 Computed Peaks 0.045 25.00 0.960 Computed Peaks Q.035 10.00 0.900 Computed Peaks 0.034 8.00 0.875 Computed Peaks 0.029 5.00 0.800 Computed Peaks 0.021 2.00 0.500 Computed Peaks 0.018 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-20.tsf Mean= -0.857 StdDev= 0.119 Project Location:Sea-Tac Skew= 0.941 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.135 29 2/16/49 21:00 0.331 1 89.50 0.989 0.331 1 3/03/50 16:00 0.258 2 32.13 0.969 0.173 10 2/09/51 2:00 0.222 3 19.58 0.949 0.115 37 10/15/51 13:00 0.218 4 14.08 0.929 0.106 49 3/24/53 15:00 0.210 S 10. 99 0. 909 0.132 27 12/19/53 19:00 0.197 6 9.01 0.889 0.133 26 2/07/55 17:00 0.195 7 7.64 0.869 0.139 22 12/20/55 17:00 0.191 8 6.63 0.849 0.143 18 12/09/56 14:00 0.178 9 5.86 0.829 0.132 28 12/25/57 16:00 0.173 10 5.24 0.809 0.116 39 1/26/59 20:00 0.170 11 4.75 0.789 0.135 23 2/06/60 17:00 0.170 12 4.34 0.769 0.140 21 2/14/6I 21:00 0.160 13 3.99 0.749 0.114 38 11/22/61 2:00 0.158 14 3.70 0.729 0.114 39 12/15/62 2:00 0.155 15 3.44 0.709 0.135 25 12/31/63 23:00 0.150 16 3.22 0.690 0.115 36 12/21/64 4:00 0.149 17 3.03 0.670 0.114 40 1/05/66 16:00 0.193 18 2.85 0.650 0.170 11 11/13/66 19:00 0.190 19 2.70 0.630 � 0.191 8 8/24/68 16:00 0.140 20 2.56 0.610 0.103 46 12/03/68 16:00 0.140 21 2.44 0.590 0.113 41 1/13/70 22:00 0.139 22 2.32 0.570 0.111 42 12/05/70 9:00 0.135 23 2.22 0.550 0.222 3 2/27/72 7:00 0.135 24 2.13 0.53Q 0.104 45 1/13/73 2:00 0.135 25 2.04 0.510 0.116 35 11/28/73 9:00 0.133 26 1.96 0.490 0.149 17 12/26/74 23:00 0.132 27 1.89 0.470 0.102 47 11/13/75 19:00 0.132 28 1.82 0.450 0.129 29 8/26/77 2:00 0.129 29 1.75 0.430 0.178 9 9/17/78 2:00 0.123 30 1.70 0.910 0.160 13 9/08/79 15:00 0.122 31 1.64 0.390 0.140 19 12/14/79 21:00 0.121 32 1.59 0.370 0.155 15 11/21/80 11:00 0.117 33 1.59 0.350 0.210 5 10/06/81 0:00 0.116 39 1.49 0.330 0.158 19 10/28/82 16:00 0.116 35 1.45 0.310 0.123 30 3/15/89 20:00 0.115 36 1.41 0.291 0.110 43 6/06/85 22:00 0.115 37 1.37 0.271 0_140 20 1/18/86 16:00 0.114 38 1.33 0.251 0.197 6 10/26/86 0:00 0.114 39 1.30 0.231 0.094 49 11/11/87 0:00 0.114 40 1.27 0.211 0.122 31 8/21/89 17:00 0.113 41 1.24 0.191 0.258 2 1/09/90 6:00 0.111 42 1.21 0.171 0.218 4 11/29/90 8:00 0.110 93 1.18 0.151 0.117 33 1/27/92 15:00 0.106 94 1.15 0.131 B-36 � SE 144`"Street-June 2007 0.086 50 11/O1/92 16:00 0.104 45 1.12 0.111 0.097 48 11/30/93 22:00 0.103 96 1.10 0.091 0.121 32 11/30/99 4:00 0.102 47 1.08 0.071 0.195 7 2/08/96 10:00 0.097 48 1.05 0.051 0.170 12 1/02/97 6:00 0.094 49 1.03 0.031 0.150 16 10/09/97 15:00 0.086 50 1.01 0.011 Computed Peaks 0.315 100.00 0.990 Computed Peaks 0.277 50.00 0.980 Computed Peaks 0.242 25.00 0.960 Computed Peaks 0.201 10.00 0.900 Computed Peaks 0.193 8.00 0.875 Computed Peaks 0.171 5.00 0.800 Computed Peaks 0.133 2.00 0.500 Computed Peaks 0.112 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-30.tsf Mean= -0.999 StdDev= 0.121 Project Location:Sea-Tac Skew= 0.973 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.109 25 2/16/49 21:00 0.276 1 89.50 0.989 0.276 1 3/03/SO 16:00 0.210 2 32.13 0.969 0.143 9 2/09/51 2:00 0.183 3 19.58 0.949 0.092 37 10/15/51 13:00 0.176 4 14.08 0.929 0.086 44 3/24/53 15:00 0.169 5 10.99 0.909 0.106 27 12/19/53 19:00 0.161 6 9.01 0.889 0.108 26 2/07/55 17:00 0.158 7 7.64 0.869 0.114 20 12/20/55 17:00 0.154 8 6.63 0.849 0.116 18 12/09/56 19:00 0.143 9 5.86 0_829 0.106 28 12/25/57 16:00 0.143 10 5.29 0.809 0.095 33 1/26/59 20:00 0.139 11 4.75 0.789 0.110 23 2/06/60 17:00 0.137 12 4.34 0.769 0.114 19 2/14/61 21:00 0.129 13 3.99 0.749 0.092 38 11/22/61 2:00 0.127 14 3.70 0.729 I 0.092 39 12/15/62 2:00 0.124 15 3.44 0.709 0.109 24 12/31/63 23:00 0.121 16 3.22 0.690 0.093 36 12/21/64 9:00 0.120 17 3.03 0.670 � 0.091 40 1/05/66 16:00 0.116 18 2.85 0.650 � 0.137 12 11/13/66 19:00 0.114 19 2.70 0.630 �� 0.154 8 8/24168 16:00 0.114 20 2.56 0.610 I 0.083 46 12/03/68 16:00 0.113 21 2.94 0.590 0.091 41 1/13/70 22:00 0.113 22 2.32 0.570 0.089 42 12/05/70 9:00 0.110 23 2.22 0.550 0.183 3 2/27/72 7:00 0.109 29 2.13 0.530 0.084 45 1/13/73 2:00 0.109 25 2.04 0.510 0.093 35 11/28/73 9:00 0.108 26 1.96 0.490 0.120 17 12/26/74 23:00 0.106 27 1.89 0.470 0.082 47 11/13/75 19:00 0.106 28 1.82 0.950 0.104 29 8/26/77 2:00 0.104 29 1.75 0.430 0.143 10 9/17/78 2:00 0.099 30 1.70 0.410 0.129 13 9/08/79 15:00 0.098 31 1.69 0.390 0.113 21 12/19/79 21:00 0.097 32 1.59 0.370 0.124 15 11/21/80 11:00 0.095 33 1.54 0.35C 0.169 5 10/06/81 0:00 0.094 34 1.49 0.330 0.127 14 10/28/82 16:00 0.093 35 1.45 0.310 0.099 30 3/15/84 20:00 0.093 36 1.41 0.291 0.088 43 6/06/85 22:00 0.092 37 1.37 0.2�1 0.113 22 1/18/86 16:00 0.092 38 1.33 0.251 B-3? SE 144`"Street-Jtme 200? 0.158 7 10/26/86 0:00 0.092 39 1.30 0.231 0.076 49 11/11/87 0:00 0.091 40 1.27 0.211 0.098 31 8/21/89 17:00 0.091 41 1.24 0.191 0.210 2 1/09/90 6:00 0.089 42 1.21 0.171 0.176 4 11/24/90 8:00 0.088 43 1.18 0.151 0.094 34 1/27/92 15:00 0.086 99 1.15 0.131 0.069 50 11/O1/92 16:00 0.084 95 1.12 0.111 0.078 48 11/30/93 22:00 0.083 96 1.10 0.091 0.097 32 11/30/94 4:00 0.082 47 1 .08 0.071 0.161 6 2/08/96 10:00 0.078 48 1.05 0.051 0.139 11 1/02/97 6:00 0.076 49 1.03 0.031 0.121 16 10/09/97 15:00 0.069 50 1.01 0.011 Computed Peaks 0.259 100.00 0.990 Computed Peaks 0.227 50.00 0.980 Computed Peaks 0.198 25.00 0.960 Computed Peaks 0.163 10.00 0.900 Computed Peaks 0.157 8.00 0.875 Computed Peaks 0.139 5.00 0.800 Computed Peaks 0.107 2.00 0.500 Computed Peaks 0.090 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-40.tsf Mean= -1 .109 StdDev= 0.105 Project Location:Sea-Tac Skew= 0.669 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.078 21 2/16/49 21:00 0.145 1 89.50 0.989 0.145 1 3/03/50 16:00 0.135 2 32.13 0.969 0.085 17 2/09/51 2:00 0.129 3 19.58 0.949 0.068 35 10/15/51 13:00 0.121 4 19.08 0.929 0.062 43 3/24/53 15:00 0.116 5 10.99 0.909 0.074 27 12/19/53 19:00 0.112 6 9.01 0.889 0.077 23 11/25/54 2:00 0.107 7 7.64 0.869 0.075 26 11/18/55 15:00 0.105 8 6.63 0.849 + 0.084 18 12/09/56 14:00 0.100 9 5.86 0.829 0.077 22 12/25/57 16:00 0.094 10 5.29 0.809 0.061 44 1/26/59 20:00 0.094 11 4.75 0.789 0.072 28 11/20/59 5:00 0.093 12 4.34 0.769 0.072 29 2/14/61 21:00 0.091 13 3.99 0.749 0.067 37 11/22/61 2:00 0.089 14 3.70 0.729 0.065 40 12/15/62 2:00 0.088 15 3.44 0.709 0.076 24 12/31/63 23:00 0.088 16 3.22 0.690 0.067 36 12/21/69 9:00 0.085 17 3.03 0.670 0.066 39 1/05/66 16:00 0.084 18 2.85 0.650 0.100 9 11/13/66 19:00 0.083 19 2.70 0.630 0.112 6 8/24/68 16:00 0.080 20 2.56 0.610 0.060 95 12/03/68 16:00 0.078 21 2.49 0.590 0.067 38 1/13/70 22:00 0.077 22 2.32 0.570 0.065 91 12/OS/70 9:00 0.077 23 2.22 0.550 0.107 7 2/27/72 7:00 0.076 24 2.13 0.530 0.060 46 1/13/73 2:00 0.076 25 2.04 0.510 0.068 34 11/28/73 9:00 0.075 26 1.96 0.490 0.088 15 12/26/79 23:00 0.074 27 1.89 0.470 ' 0.060 47 11/13/75 19:00 0.072 28 1.82 0.450 ' 0.076 25 8/26/77 2:00 0.072 29 1.75 0.430 ' 0.105 8 9/17/78 2:00 0.072 30 1.70 0.410 II 0.094 10 9/OS/79 15:00 0.071 31 1.64 0.390 I 0.083 19 12/14/79 21:00 0.070 32 1.59 0.370 I B-38 SE 144`"Stree!-June 1007 0.091 13 11/21/80 11:00 0.069 33 1.59 0.350 0.124 3 10/06/81 0:00 0.068 34 1.49 0.330 0.093 12 10/28/82 16:00 0.068 35 1.45 0.310 0.070 32 1/03/84 1:00 0.067 36 1.41 0.291 0.064 42 6/06185 22:00 0.067 37 1.37 0.271 0.080 20 1/18/86 16:00 0.067 38 1.33 0.251 0.116 5 10/26/86 0:00 0.066 39 1.30 0.231 0.055 49 11/11/87 0:00 0.065 40 1.27 0.211 0.072 30 8/21/89 17:00 0.065 41 1.24 Q.191 0.135 2 1/09/90 6:00 0.069 42 1.21 0.171 0.121 4 11/29/90 8:00 0.062 93 1.18 0.151 0.069 33 1/27/92 15:00 0.061 94 1.15 0.131 0.050 50 11/O1/92 16:00 0.060 95 1.12 0.111 0.057 48 9/03/94 10:00 0.060 96 1.10 0.091 0.071 31 11/30/94 4:00 0.060 97 1.08 0.071 0.094 11 2/08/96 10:00 0.057 98 1.05 0.051 , C.088 16 1/02/97 6:00 0.055 49 1.03 0.031 � 0.089 14 10/04/97 15:00 0.050 50 1.01 0.011 I Computed Peaks 0.159 100.00 0.990 Computed Peaks 0.190 50.00 0.980 Computed Peaks 0.126 25.00 0.960 Computed Peaks 0.108 10.00 0.900 Computed Peaks 0.105 8.00 0.875 Computed Peaks 0.095 5.00 0.800 Computed Peaks 0.077 2.00 0.500 Computed Peaks 0.065 1.30 0_231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-92.tsf Mean= -0.747 StdDev= 0.110 Project Location:Sea-Tac Skew= 0.799 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period G.175 21 2/16/49 21:00 0.372 1 89.50 0.989 I 0.372 1 3/03/50 16:00 0.319 2 32.13 0.969 0.207 14 2/09/51 2:00 0.277 3 19.58 0.949 0.151 36 10/15/51 13:00 0.276 4 14.08 0.929 0.139 44 3/24/53 15:00 0.263 5 10.99 0.909 0.169 28 12/19/53 19:00 0.259 6 9.01 0.889 0.172 25 11/25/54 2:00 0.251 7 7.64 0.869 0.172 23 12/20/55 17:00 0.239 8 6.63 0.849 0.188 18 12/09/56 19:00 0.230 9 5.86 0.829 0.172 29 12/25/57 16:00 0.229 10 5.29 0.809 0.144 93 1/26/59 20:00 0.210 11 4.75 0.789 0.167 29 2/06/60 17:00 0.209 12 9.34 0.769 0.171 26 2/19/61 21:00 0.208 13 3.99 0.749 0.149 37 11/22/61 2:00 0.207 19 3.70 0.729 0.147 90 12/15/62 2:00 0.203 15 3.49 0.709 0.174 22 12/31/63 23:00 0.197 16 3.22 0.690 0.151 35 12/21/64 4:00 0.196 17 3.03 0.670 0.149 38 1/05/66 16:00 0.188 18 2.85 0.650 0.224 10 11/13/66 19:00 0.185 19 2.70 0.630 0.251 7 8/24/68 16:00 0.182 20 2.56 0.610 0.135 46 12/03/68 16:00 0.175 21 2.94 0.590 0.148 39 1/13/70 22:00 0.179 22 2.32 0.570 0.146 41 12/05/70 9:00 0.172 23 2.22 0.550 0.263 5 2/27/72 7:00 0.172 24 2.13 0.530 0.136 95 1/13/73 2:00 0.172 25 2.04 0.510 0.153 34 11/28/73 9:0� 0.171 26 1.96 0.490 B-39 SE I44'"Street-June 1007 0.196 17 12/26;'�9 23:00 0.17G �i 1 . 89 0.4i0 0.134 47 11/13/75 19:00 0.169 28 1.82 0.450 0.170 27 8/26/77 2:00 0.167 29 1.75 0.430 0.234 8 9/17/78 2:00 0.160 30 1.70 0.410 0.210 11 9/08/79 15:00 0.158 31 1.69 0.390 0.185 19 12/19/79 21:00 0.158 32 1.59 0.3�0 0.203 15 11/21/80 11:00 0.154 33 1.54 0.350 0.276 9 10/06/81 0:00 0.153 34 1.49 0.330 0.208 13 10/28/82 16:00 0.151 35 1.45 0.3i0 0.158 32 1/03/84 1:00 0.151 36 1.41 0.291 0.149 92 6/06/85 22:00 0.149 37 1.37 0.2i1 0.182 ZO 1/18/86 16:00 0.149 38 1.33 0.251 0.259 6 10/26/86 0:00 0.198 39 1.30 0.231 0.124 99 11/11/87 0:00 0.197 40 1.27 0.211 0.160 30 8/21/89 17:00 0.146 91 1.24 0.191 0.319 2 1/09/90 6:00 0.144 42 1.21 0.1;1 0.277 3 11/24/90 8:00 0.144 43 1.18 0.151 0.154 33 1/27/92 15:00 0.139 44 1.15 0.131 0.113 50 11/O1/92 16:00 0.136 45 1.12 0.111 0.128 98 11/30/93 22:00 0.135 96 1.10 O.C91 0.158 31 11/30/94 9:00 0.134 47 1.08 0.071 0.230 9 2/08/96 10:00 0.128 48 1.05 0.051 0.209 12 1/02/97 6:00 0.124 49 1.03 0.031 C.197 16 10/09/97 15:00 0.113 50 1.01 0.011 Computed Peaks 0.373 100.00 0.990 Computed Peaks 0.334 50.00 0.980 Computed Peaks 0.297 25.00 0.960 Computed Peaks 0.251 10.00 0.900 Computed Peaks 0.243 8.00 0.875 Computed Peaks 0.218 5.00 0.800 Computed Peaks 0.173 2.00 0.500 Computed Peaks 0.197 1.30 0.231 � �low Frequency Analysis LogPearson III Coefficients I Time Series File:c-94.tsf Mean= -0.596 StdDev= 0.096 ' Project Location:Sea-Tac Skew= 0.562 � ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFSS Period 0.253 21 2/16/49 21:00 0.407 1 89.50 0.989 0.368 6 3/03/50 16:00 0.907 2 32. 13 0.969 0.246 25 2/09/51 2:00 0.382 3 19.58 0.999 0.223 34 10/15/51 13:00 0.382 4 14.08 0.929 0.203 43 3/24/53 15:00 0.370 5 10. 99 0. 909 0.239 28 12/19/53 19:00 0.368 6 9.01 0.889 0.253 22 11/25/59 2:00 0.395 7 7.64 0.869 0.297 24 11/18/55 15:00 0.330 8 6.63 0.849 0.278 15 12/09/56 19:00 0.310 9 5.86 0.829 0.254 20 12/25/57 16:00 0.307 10 5.29 0.809 0.194 97 11/03/58 17:00 0.303 11 4.75 0.789 0.239 27 11/20/59 5:00 0.300 12 4.39 0.769 0.219 40 2/19/61 21:00 0.292 13 3.99 0.749 0.221 36 11/22/61 2:00 0.289 14 3.70 0.729 0.211 42 12/15/62 2:00 0.278 15 3.44 0.709 0.294 26 12/31/63 23:00 0.273 16 3.22 0.690 0.221 35 12/21/69 4:00 0.268 17 3.03 0.670 0.219 38 1/05/66 16:00 0.262 18 2.85 0. 650 0.330 8 11/13/66 19:00 0.260 19 2.70 0.630 0.370 5 S/24/68 16:00 0.254 20 2.56 0.610 B-40 SE 144`�'Street-June 2007 0.198 94 12/03/68 16:OQ 0.253 21 2.44 0.590 0.220 37 1/13/70 22:00 0.253 22 2.32 0.570 0.215 39 12/05/70 9:00 0.251 23 2.22 0.550 0.303 11 12/08/71 18:00 0.247 24 2.13 0.530 0.197 46 1/13/73 2:00 0.246 25 2.04 0.510 0.226 33 11/28/73 9:00 0.294 26 1.96 0.490 0.289 14 12/26/79 23:00 0.239 27 1.89 0.970 0.198 45 11/13/75 19:00 0_239 28 1.82 0.450 0.251 23 8/26/77 2:00 0.237 29 1.75 0.430 0.345 7 9/17/78 2:00 0.234 30 1.70 0.910 0.310 9 9/08/79 15:00 0.231 31 1.64 0.390 0.273 16 12/14/79 21:00 0.228 32 1.59 0.370 0.300 12 11/21/80 11:00 0.226 33 1.59 0.350 0.407 1 10/06/81 0:00 0.223 34 1.99 0.330 0.307 10 10/28/82 16:00 0.221 35 1.95 0.310 0.231 31 1/03/84 1:00 0.221 36 1.41 0.291 0.213 41 6/06/85 22:00 0.220 37 1.37 0.271 0.262 18 1/18/86 16:00 0.219 38 1.33 0.251 0.382 3 10/26/86 0:00 0.215 39 1.30 0.231 0.183 49 11/11/87 0:00 0.214 40 1.27 0.211 0.237 29 8/21/89 17:00 0.213 41 1.29 0.191 0.407 2 1/09/90 6:00 0.211 42 1.21 0.171 0.382 4 11/24/90 8:00 0.203 93 1.18 0.151 0.228 32 1/27/92 15:00 0.198 99 1.15 0.131 0.166 50 11/O1/92 16:00 0.198 95 1.12 0.111 0.189 48 11/30/93 22:00 0.197 96 1.10 0.091 0.239 30 11/30/99 9:00 0.194 97 1.08 0.071 , 0.268 17 2/08/96 10:00 0.189 48 1.05 0.051 ' 0.260 19 1/02/97 6:00 0.183 99 1.03 0.031 0.292 13 10/04/97 15:00 0.166 50 1.01 0.011 Computed Peaks 0.462 100.00 0.990 Computed Peaks 0.425 50.00 0.980 Computed Peaks 0.388 25.00 0.960 Computed Peaks 0.340 10.00 0.900 Computed Peaks 0.330 8.00 0.875 Computed Peaks 0.303 5.00 0.800 Computed Peaks 0.299 2.00 0.500 Computed Peaks 0.214 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-50.tsf Mean= -0.884 StdDev= 0.095 Project Location:Sea-Tac Skew= 0.562 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.130 21 2/16/49 21:00 0.210 1 89.50 0.989 0.190 6 3/03/50 16:00 0.209 2 32.13 0.969 0.127 25 2/09/51 2:00 0.196 3 19.58 0.949 0.115 34 10/15/51 13:00 0.196 9 14.08 0.929 0.105 43 3/24/53 15:00 0.191 5 10. 99 0.909 0.123 28 12/19/53 19:00 0.190 6 9.01 0.889 0.130 22 11/25/54 2:00 0.178 7 7.69 0.869 0.127 24 11/18/55 15:00 0.170 8 6.63 0.899 0.143 15 12/09/56 14:00 0.160 9 5.86 0.829 0.131 20 12/25/57 16:00 0.158 10 5.24 0.809 0.100 47 11/03/58 17:00 0.156 11 9.75 0.789 0.123 27 11/20/59 5:00 0.154 12 9.34 0.769 0.110 40 2/14/61 21:00 0.150 13 3.99 0.749 0.114 35 11/22/61 2:00 0.149 19 3.70 0.729 B-41 SE 144`''Street-June 2007 0.109 42 12/15/62 2:00 0.143 15 3.49 0.709 0.126 26 12/31/63 23:00 0.140 16 3.22 0.690 0.114 36 12/21/64 4:00 0.138 17 3.03 0.670 0.112 38 1/05/66 16:00 0.135 18 2.85 0.650 0.170 8 11/13/66 19:00 0.134 19 2.70 0.63Q 0.191 5 8/24/68 16:00 0.131 20 2.56 0.610 0.102 94 12/03/68 16:00 0.130 21 2.44 0.590 0.113 37 1/13/70 22:00 0.130 22 2.32 0.570 0.111 39 12/05/70 9:00 0.129 23 2.22 0.550 0.156 11 12/08/71 18:00 0.127 24 2.13 0.530 0.101 96 1/13/73 2:00 0.127 25 2.04 0.510 0.116 33 11/28/73 9:00 0.126 26 1. 96 0.490 0.199 14 12/26/74 23:00 0.123 27 1.89 0.470 0.102 95 11/13/75 19:00 0.123 28 1.82 0.450 0.129 23 8/26/77 2:00 0.122 29 1.75 0.430 0.178 7 9/17/78 2:00 0.120 30 1.70 0.410 0.160 9 9/OS/79 15:00 0.119 31 1.69 0.390 0.140 16 12/14/79 21:00 0.117 32 1.59 0.370 0.154 12 lI/21/80 11:00 0.116 33 1.59 0.350 0.210 1 10/06/81 0:00 0.115 34 1.49 0.330 0.158 10 10/28/82 16:00 0.114 35 1.45 0.310 0.119 31 1/03/89 1:00 0.114 36 1.41 0.291 0.110 41 6/06/85 22:00 0.113 37 1.37 0.271 0.135 18 1/18/86 16:00 0.112 38 1.33 0.251 0.196 3 10/26/86 0:00 0.111 39 1.30 0.231 0.094 49 11/11/87 0:00 0.110 90 1.27 0.211 0.122 29 8/21/89 17:00 0.110 41 1.24 0.191 0.209 2 1/09/90 6:00 0.109 92 1.21 0.171 0.196 4 11/29/90 8:00 0.105 43 1.18 0.151 0.117 32 1/27/92 15:00 0.102 44 1.15 0.131 I 0.086 SO 11/O1/92 16:00 0.102 45 1.12 0.111 0.097 98 11/30/93 22:00 0.101 46 1.10 0.091 0.120 30 11/30/94 4:00 0.100 47 1.08 0.071 0.138 17 2/08/96 10:00 0.097 48 1.05 0.051 0.134 19 1/02/97 6:00 0.094 49 1.03 0.031 I 0.150 13 IO/04/97 15:00 0.086 50 1.01 0.011 Computed Peaks 0.238 100.00 0.990 Computed Peaks 0.219 50.00 0.980 Computed Peaks 0.200 25.00 0.960 Computed Peaks 0.175 10.00 6.900 ; Computed Peaks 0.170 8.00 0.875 I Computed Peaks 0.156 5.00 0.800 I , Computed Peaks 0.128 2.00 0.500 Computed Peaks 0.110 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-52.tsf Mean= -0.457 StdDev= 0.118 Project Location:Sea-Tac Skew= 0.538 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.357 21 2/16/49 21:00 0.701 1 89.50 0. 989 0.701 1 3/03/50 16:00 0.669 2 32.13 0.969 0.397 15 2/09/51 2:00 0.592 3 19.58 0.999 0.278 40 10/15/51 13:00 0.563 4 14.08 0.929 0.270 45 3/24/53 15:00 0.500 5 10.99 0.909 0.335 26 12/19/53 19:00 0.988 6 9.01 0.889 0.338 24 11/25/59 2:00 0.984 7 7.64 0.86° 0.390 23 12/20/55 17:00 0.452 8 6.63 0.849 8-42 SE 144'�'Street-June 200? 0.394 17 12/09/56 14:00 0.498 9 5.86 0.829 0.345 22 12/25/57 16:00 0.427 10 5.24 0.809 0.267 96 1/26/59 20:00 0.423 11 4.75 0.789 0.333 27 11/20/59 5:00 0.405 12 4.34 0.769 0.317 30 2/14/61 21:00 0.409 13 3.99 0.749 0.289 38 11/22/61 2:00 0.402 14 3.70 0.729 0.299 35 12/15/62 2:00 0.397 15 3.99 0.709 0.336 25 12/31/63 23:00 0.396 16 3.22 0.690 0.295 37 12/21/64 4:00 0.394 17 3.03 0.670 0.298 36 1/05/66 16:00 0.389 18 2.85 0.650 0.452 8 11/13/66 19:00 0.387 19 2.70 0.630 0.488 6 8/24/68 16:00 0.379 20 2.56 0.610 0.272 42 12/03/68 16:00 0.357 21 2.44 0.590 0.300 34 1/13/70 22:00 0.345 22 2.32 0.570 0.286 39 12/Q6/70 8:00 0.340 23 2.22 0.550 0.500 5 2/27/72 7:00 0.338 24 2.13 0.530 0.265 47 1/13/73 2:00 0.336 25 2.04 0.510 0.320 28 11/28/73 9:00 0.335 26 1 .96 0.490 0.423 11 12/26/74 23:00 0.333 27 1.89 0.470 0.271 93 12/02/75 20:00 0.320 28 1.82 0.450 0.312 31 8/26/77 2:00 0.319 29 1.75 0.430 0.927 10 9/17/78 2:00 0.317 30 1.70 0.410 0.374 20 9/08/79 15:00 0.312 31 1.69 0.390 0.387 19 12/14/79 21:00 0.310 32 1.59 0.370 0.404 13 11/21/80 11:00 0.307 33 1.59 0.350 0.563 9 10/06/81 0:00 0.300 34 1.49 0.330 0.396 16 10/28/82 16:00 0.299 35 1.45 0.31G 0.319 29 1/03/89 1:00 0.298 36 1.41 0.291 0.270 44 6/06/85 22:00 0.295 37 1.37 0.271 0.389 18 1/18/86 16:00 0.289 38 1.33 0.251 0.484 7 10/26/86 0:00 0.286 39 1.30 0.231 0.212 49 11/11/87 0:00 0.278 90 1.27 0.211 0.275 41 8/21/89 17:00 0.275 91 1.29 0.191 0.669 2 1/09/90 6:00 0.272 42 1.21 0.1?1 0.592 3 11/24/90 8:04 0.271 43 1.18 0.151 0.310 32 1/27/92 15:00 0.270 99 1.15 0.131 0.199 50 11/O1/92 16:00 0.270 45 1.12 0.111 0.232 48 11/30/93 22:00 0.267 46 1.10 0.091 0.307 33 11/30/99 4:00 0.265 47 1.08 0.071 0.448 9 2/08/96 10:00 0.232 48 1.05 0.051 0.402 14 1/02/97 6:00 0.212 49 1.03 0.031 0.405 12 10/09/97 15:00 0.199 50 1.01 0.011 Computed Peaks 0.729 100.00 0.990 Computed Peaks 0.657 50.00 0.980 Computed Peaks 0.588 25.00 0.960 Computed Peaks 0.501 10.00 0.90C Computed Peaks 0.483 8.00 0.875 Computed Peaks 0.435 5.00 0.800 Computed Peaks 0.341 2.00 0.500 Computed Peaks 0.283 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-54.tsf Mean= -0.367 StdDev= 0.117 Project Location:Sea-Tac Skew= 0.588 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS} Period 0.437 21 2/16/49 21:00 0.876 1 89.50 0.989 0.876 1 3/03/50 16:00 0.818 2 32.13 0.969 B-43 SE 144"'Street-June 200? 0.493 14 2/09/51 2:00 0.720 3 19.58 0.999 0.395 40 10/15/51 13:00 0.687 4 14.08 0.929 0.332 44 3/29/53 15:00 0.622 5 10.99 0.909 0.411 26 12/19/53 19:00 0.600 6 9.01 0.889 0.415 24 11/25/54 2:00 0.598 7 7.64 0.869 0.420 23 12/20/55 17:00 0.556 8 6.63 0.899 0.480 17 12/09/56 14:00 0.552 9 5.86 0.829 0.422 22 12/25/57 16:00 0.530 10 5.24 0.809 0.332 45 1/26/59 20:00 0.513 11 9.75 0.789 0.407 27 11/20/59 5:00 0.998 12 9.34 0.769 0.395 28 2/14/61 21:00 0.494 13 3.99 0.749 0.356 38 11/22/61 2:00 0.493 19 3.70 0.729 0.366 35 12/15/62 2:00 0.993 15 3.44 0.709 0.415 25 12/31/63 23:00 0.988 16 3.22 0.690 0.363 37 12/21/69 4:00 0.980 17 3.03 0.670 0.365 36 1/05/66 16:00 0.973 18 2.85 0.650 0.552 9 11/13/66 19:00 0.970 19 2.70 0.630 0.600 6 8/24/68 16:00 0.466 20 2.56 0.610 0.333 43 12/03/68 16:00 0.937 21 2.44 0.590 0.367 39 1/13/70 22:00 0.422 22 2.32 0.570 0.350 39 12/06/70 8:00 0.920 23 2.22 0.550 0.622 5 2/27/72 7:00 0.415 24 2.13 0.530 0.327 47 1/13/73 2:00 0.915 25 2.04 0.510 0.389 30 11/28/73 9:00 0.411 26 1.96 0.490 0.513 11 12/26/79 23:00 0.407 27 1.89 0.970 0.332 96 12/02/75 20:00 0.395 28 1.82 0.950 0.386 31 8/26/77 2:00 0.391 29 1.75 0.430 0.530 10 9/17/78 2:00 0.389 30 1.70 0.910 0.466 20 9/08/79 15:00 0.386 31 1.69 0.390 0.470 19 12/14/79 21:00 0.379 32 1_59 0.370 0.494 13 11/21/80 II:00 0.377 33 1.54 0.350 0.687 4 10/06/81 0:00 0.367 34 1.49 0.330 0.488 16 10/28/82 16:0� 0.366 35 1.45 0.310 0.391 29 3/15/89 20:00 0.365 36 1.41 0.291 0.334 42 6/06/85 22:00 0.363 37 1.37 0.271 0.973 18 1/18/86 16:00 0.356 38 1.33 0.251 ' 0.598 7 10/26/86 0:00 0.350 39 1.30 0.231 I 0.266 49 11/11/87 0:00 0.345 40 1.27 0.211 I 0.395 41 8/21/89 17:00 0.345 91 1.24 0.191 I 0.818 2 1/09/90 6:00 0.334 92 1.21 0.171 0.720 3 11/24/90 8:00 0.333 43 1.18 0.151 0.379 32 1/27/92 15:00 0.332 44 1.15 0.131 0.248 50 11/O1/92 16:00 0.332 45 1.12 0.111 0.288 48 11/30/93 22:00 0.332 46 1.10 0.091 0.377 33 11/30/94 9:00 0.327 47 1.08 0.071 0.556 8 2/08/96 10:00 0.288 48 1.05 0.051 0.498 12 1/02/97 6:00 0.266 49 1.03 0.031 0.493 15 10/09/97 15:00 0.298 50 1.01 0.011 Computed Peaks 0.902 100.00 0.990 Computed Peaks 0.811 50.00 0.980 Computed Peaks 0.729 25.00 0.960 Computed Peaks 0.615 10.00 0.900 Computed Peaks 0.593 8.00 0.875 Computed Peaks 0.534 5.00 O.fi00 Computed Peaks 0.419 2.00 0.500 Computed Peaks 0.399 1 .30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-60.tsf Mean= -0.876 StdDev= 0 .096 Project Location:Sea-Tac Skew= 0.561 B-44 SE 144"'Street-June 1007 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.133 21 2/16/49 21:00 0.214 1 89.50 0.989 0.193 6 3/03/50 16:00 0.213 2 32.13 0.969 0.129 25 2/09/51 2:00 0.201 3 19.58 0.949 0.117 34 10/15/51 13:00 0.200 9 14.08 0.929 0.107 43 3/24/53 15:00 0.195 5 10.99 0.909 0.125 27 12/19/53 19:00 0.193 6 9.01 0.889 0.133 22 11/25/54 2:00 0.181 7 7.64 0.869 0.130 24 11/18/55 15:00 0.173 8 6.63 0.849 0.146 15 12/09/56 14:00 0.163 9 5.86 0.829 0.133 20 12/25/57 16:00 0.162 10 5.24 0.809 0.102 47 11/03/58 17:00 0.159 11 4.75 0.789 0.125 28 11/20/59 5:00 0.157 12 9.39 0.769 0.112 40 2/14/61 21:00 0.153 13 3.99 0.749 0.116 35 11/22/61 2:00 0.152 14 3.70 0.729 0.111 42 12/15/62 2:00 0.146 15 3.44 0.709 0.128 26 12/31/63 23:00 0.143 16 3.22 0.690 0.116 36 12/21/69 4:00 0.190 17 3_03 0.670 0.115 38 1/05/66 16:00 0.138 18 2.85 0.650 0.173 8 11/13/66 19:00 0.137 19 2.70 0.630 0.195 5 8/24/68 16:00 O.I33 20 2.56 0.610 0.104 44 12/03/68 16:00 0.133 21 2.44 0.590 0.116 37 1/13/70 22:00 0.133 22 2.32 0.570 0.113 39 12/05/70 9:00 0.132 23 2.22 0.550 0.159 11 12/08/71 18:00 0.130 29 2.13 0.530 0.103 46 1/13/73 2:00 0.129 25 2.04 0.510 0.118 33 11/28/73 9:00 0.128 26 1.96 0.490 0.152 14 12/26/79 23:00 0.125 27 1.89 0.470 0.104 95 11/13/75 19:00 0.125 28 1.82 0.450 0.132 23 8/26/77 2:00 0.124 29 1.75 0.430 0.181 7 9/17/78 2:00 0.123 30 1.70 0.910 �.163 9 9/OS/79 15:00 0.121 31 1.69 0.390 0.193 16 12/14/79 21:00 0.120 32 1.59 0.370 � 0.157 12 11/21/80 11:00 0.118 33 1.54 0.350 0.219 1 10/06/81 0:00 0.117 34 1.49 0.330 0.162 10 10/28/82 16:00 0.116 35 1.45 0.310 0.121 31 1/03/84 1:00 0.116 36 1.41 0.291 0.112 41 6/06/85 22:00 0.116 37 1.37 0.271 0.138 18 1/18/86 16:OQ 0.115 38 1.33 0.251 0.201 3 10/26/86 0:00 0.113 39 1.30 0.231 0.096 49 11/11/87 0:00 0.112 90 1.27 0.211 0.124 29 8/21/89 17:00 0.112 41 1.24 0.191 0.213 2 1/09/90 6:00 0.111 42 1.21 0.1�1 0.200 9 11/24/90 B:00 0.107 43 1.18 0.151 0.120 32 1/27/92 15:00 0.109 44 1.15 0.131 0.087 50 11/O1/92 16:00 0.104 45 1.12 0_111 0.099 98 11/30/93 22:00 0.103 96 1.10 0.091 0.123 30 11/30/94 4:00 0.102 47 1.08 0.071 0.140 17 2/08/96 10:00 0.099 48 1.05 0.051 0.137 19 1/02/97 6:00 0.096 99 1.03 0.031 0.153 13 10/04/97 15:00 0.087 50 1.01 0.011 Computed Peaks 0.293 100.00 0.990 ! Computed Peaks 0.223 50.00 0.980 �I Computed Peaks 0.209 25.00 0.960 Computed Peaks 0.178 10.00 0.900 Computed Peaks 0.173 8.00 0.875 Computed Peaks 0.159 5.00 0.800 a-as SE 14�h Srree!-June 100? Computed Peaks 0.130 2.00 0.500 Computed Peaks 0.112 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-70.tsf Mean= -0.327 StdDev= 0.133 Project Location:Sea-Tac Skew= 0.509 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.492 20 2/16/49 21:00 1.06 1 89.50 0.989 1.06 1 3/03/50 16:00 0.988 2 32.13 0.969 0.578 11 2/09/51 2:00 0.861 3 19.58 0.999 0.353 45 1/30/52 8:00 0.781 4 19.08 0.929 0.354 44 3/24/53 15:00 0.729 5 10.99 0.909 0.454 25 12/19/53 19:00 0.667 6 9.01 0.889 0.470 22 2/07/55 17:00 0.635 7 7.64 0.869 0.485 21 12/20/55 17:00 0.610 8 6.63 0.849 0.549 16 12/09/56 19:00 0.607 9 5.86 0.829 0.462 23 12/25/57 16:00 0.609 10 5.29 0.809 0.361 92 1/26/59 20:00 0.578 11 4.75 0.789 0.461 29 11/20/59 5:00 0.568 12 4.39 0.769 0.432 30 2/14/61 21:00 0.562 13 3.99 0.799 0.376 39 11/22/61 2:00 0.557 19 3.70 0.729 0.911 32 12/15/62 2:00 0.551 15 3.44 0.709 0.951 26 12/31/63 23:00 0.599 16 3.22 0.690 0.389 37 12/21/64 4:00 0.540 17 3.03 0.670 0.902 39 1/05/66 16:00 0.536 18 2.85 0.650 0. 610 8 11/13/66 19:00 0.508 19 2.70 0.630 0.635 7 8/24/68 16:00 0.492 20 2.56 0.610 0.371 41 12/03/68 16:00 0.485 21 2.44 0.590 0.405 33 1/13/70 22:00 0.470 22 2.32 0.570 0.396 36 12/06/70 8:00 0.462 23 2 .22 0.550 0.729 5 2/27/72 7:00 0.961 24 2.13 0.530 0.355 43 1/13/73 2:00 0.959 25 2.09 0.510 0.441 28 11/28/73 9:00 0.951 26 1.96 0.990 0.604 10 12/26/74 23:00 0.450 27 1.89 0.470 I 0.373 40 12/02/75 20:00 0.441 28 1.82 0.450 0.385 38 8/26/77 2:00 0.436 29 1.75 0.430 0.557 19 9/22/78 19:00 0.432 30 1.70 0.410 0.450 27 9/08/79 15:00 0.416 31 1.64 0.390 0.536 18 12/19/79 21:00 0.411 32 1 .59 0.370 0.590 17 11/21/80 11:00 0.405 33 1 .54 0.350 0.781 9 10/06/81 15:00 0.402 34 1.49 0.330 0.508 19 10/28/82 16:00 0.901 35 1.95 0.310 0.936 29 3/15/89 20:00 0.396 36 1.41 0.291 0.340 46 6/06/85 22:00 0.389 37 1.37 0.271 0.562 13 1/18/86 16:00 0.385 38 1.33 0.251 0.607 9 10/26/86 0:00 0.376 39 1.30 0.231 0.267 49 1/19/88 0:00 0.373 90 1.27 0.211 0.321 47 8/21/89 17:00 0.371 91 1.24 0.191 0.988 2 1/09/90 6:00 0.361 42 1.21 0.171 0.861 3 11/24/90 8:00 0.355 43 1.18 0.151 0.416 31 1/27/92 15:00 0.354 44 1.15 0.131 0.299 50 12/10/92 6:00 0.353 45 1.12 0.111 0.283 48 11/30/93 22:00 0.340 46 1.10 0.091 0.901 35 11/30/99 4:00 0.321 97 1.08 0.071 0.667 6 2/08/96 10:00 0.283 98 1.05 0.051 0.568 12 1/02/97 6:00 0.267 49 1.03 0.031 0.551 15 10/04/97 15:00 0.249 50 1.01 0.011 B-46 sE raa�"sr.eer-ru�zoo� Computed Peaks 1.08 100.00 0.990 Computed Peaks 0.958 50.00 0.980 , Computed Peaks 0.847 25.00 0.960 Computed Peaks 0.707 10.00 0.900 Computed Peaks 0.680 8.00 0.875 I Computed Peaks 0.604 5.00 0.800 li Computed Peaks 0.459 2.00 0.500 � Computed Peaks 0.371 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-80.tsf Mean= 0.090 StdDev= 0.131 Project Location:Sea-Tac Skew= 0.500 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.34 18 2/16/49 21:00 2.61 1 89.50 0.989 2.57 2 3/03/50 16:00 2.57 2 32.13 0.969 1.51 11 2/09/S1 2:00 2.31 3 19.58 0.949 0.958 41 1/30/52 8:00 2.05 9 14.08 0.929 0.926 44 3/24/53 15:00 1.84 5 10. 99 0.909 1.19 25 12/19/53 19:00 1.77 6 9.01 0.889 1.28 21 2/07/55 17:00 1.65 7 7. 64 0.869 1.30 20 12/20/55 17:00 1.59 8 6.63 0.849 1.48 13 12/09/56 14:00 1.58 9 5.86 0.829 1.20 24 12/25/57 16:00 1.53 10 5.24 0.809 0.915 45 1/26/59 20:00 1.51 11 4.75 0.789 1.24 23 11/20/59 5:00 1.51 12 4.34 0.769 1.09 31 2/14/61 21:00 1.48 13 3.99 0.794 0.938 43 11/22/61 2:00 1.97 14 3.70 0.729 1.08 32 12/15/62 2:00 1.41 15 3.99 0.709 1.19 26 12/31/63 23:00 1.38 16 3.22 0.690 1.02 37 12/21/64 9:00 1.36 17 3.03 0.670 1.08 34 1/05/66 16:00 1.39 18 2.85 0.650 1.51 12 11/13/66 19:00 1.34 19 2.70 0.630 1.59 8 8/24/68 16:00 1.30 20 2.56 0.610 I 1.01 39 12/03/68 16:00 1.28 21 2.44 0.590 1.08 33 1/13/70 22:00 1.27 22 2.32 0.570 1.05 35 12/06/70 8:00 1.24 23 2.22 0.550 1.84 5 2/27/72 7:00 1.20 29 2.13 0.530 0.954 42 1/13/73 2:00 1.19 25 2.04 0.510 1.19 28 11/28/73 9:00 1.19 26 1. 96 0.490 1.65 7 12/26/74 23:00 1.15 27 1.89 0.970 1.02 36 12/02/75 20:00 1.14 28 1.82 0.450 0.972 40 8/26/77 2:00 1.19 29 1.75 0.930 1.38 16 9/22/78 19:00 1.10 30 1.70 0.410 1.19 29 9/08/79 15:00 1.09 31 1.69 0.390 1.41 15 12/14/79 21:00 1.08 32 1.59 0.370 1.34 19 11/21/80 11:00 1.08 33 1.59 0.350 2.05 4 10/06/81 15:00 1.08 34 1.99 0.330 1.27 22 10/28/82 16:00 1 .05 35 1.45 0.310 1.15 27 1/03/84 1:00 1.02 36 1.41 0.291 0.858 96 6/06/85 22:00 1.02 37 1.37 0.271 1.58 9 1/18/86 16:00 1.02 38 1.33 0.251 1.53 10 10/26/86 0:00 1.01 39 1.30 0.231 0.707 49 1/14/88 12:00 0.972 40 1.27 0.211 0.815 47 8/21/89 17:00 0.958 41 1.29 0.191 2.61 1 1/09/90 6:00 0.954 42 1.21 0.171 2.31 3 11/24/90 8:00 0.938 43 1.18 0.151 1.10 30 1/27/92 15:00 0.926 94 1.15 0.131 B-47 SE 144`''Street-June 2007 0.692 50 3/22/93 22:00 0.915 45 1.12 0.111 0.717 48 11/30/93 22:00 0.858 46 1.10 0.091 1.02 38 11/30/94 4:00 0.815 47 1.08 0.071 1.77 6 2/08/96 10:00 0.717 48 1.05 0.051 1.47 14 1/02/97 6:00 0.707 49 1.03 0.031 1 .36 17 10/04/97 15:00 0.692 50 1.01 0.011 Computed Peaks 2.76 100.00 0.990 Computed Peaks 2.47 50.00 0.980 Computed Peaks 2.19 25.00 0.960 Computed Peaks 1.83 10.00 0.900 Computed Peaks 1.76 8.00 0.875 Computed Peaks 1.57 5.00 0.800 Computed Peaks 1 .20 2.00 0.500 Computed Peaks 0.973 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-90.tsf Mean= -0.989 StdDev= 0.096 Project Location:Sea-Tac Skew= 0.559 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.102 21 2/16/49 21:00 0.164 1 89.50 0.989 0.148 6 3/03/50 16:00 0.164 2 32.13 0.969 0.099 25 2/09/51 2:00 0.155 3 19.58 0.949 0.090 34 10/15/51 13:00 0.155 4 19.08 0.929 0.082 43 3/24/53 15:00 0.150 5 10.99 0.909 0.096 28 12/19/53 19:00 0.148 6 9.01 0.889 0.102 22 11/25/54 2:00 0.139 7 7.64 0.869 0.100 24 I1/18/55 15:00 0.133 8 6.63 0.899 0.112 15 12/09/56 14:00 0.125 9 5.86 0.829 0.103 20 12/25/57 16:00 0.124 10 5.24 0.809 0.078 97 11/03/58 17:00 0.123 11 4.75 0.789 0.097 27 11/20/59 5:00 0.121 12 4.39 0.769 0.086 40 2/19/61 21:00 0.118 13 3.99 0.749 I 0.090 35 11/22/61 2:00 0.117 19 3.70 0.729 0.085 42 12/15/62 2:00 0.112 15 3.44 0.709 0.099 26 12/31/63 23:00 0.110 16 3.22 0.690 0.089 36 12/21/69 4:00 0.108 17 3.03 0.670 0.088 38 1/05/66 16:00 0.106 18 2.85 0.650 0.133 8 11/13/66 19:00 0.105 19 2.70 0.630 0.150 5 8/24/68 16:00 0.103 20 2.56 0.610 0.080 94 12/03/68 16:00 0.102 21 2.49 0.590 0.089 37 1/13/70 22:00 0.102 22 2.32 0.570 0.087 39 12/05/70 9:00 0.101 23 2.22 0.550 0.123 11 12/08/71 18:00 0.100 29 2.13 0.530 0.080 96 1/13/73 2:00 0.099 25 2.09 0.510 0.091 33 11/28/73 9:00 0.099 26 1.96 0.490 0.117 14 12/26/74 23:00 0.097 27 1.89 0.470 0.080 45 11/13/75 19:00 0.096 28 1.82 0.950 0.101 23 8/26/77 2:00 0.095 29 1.75 0.430 0.139 7 9/17/78 2:00 0.095 30 1.70 0.410 0.125 9 9/08/79 15:00 0.093 31 1.64 0.390 0.110 16 12/19/79 21:00 0.092 32 1.59 0.370 0.121 12 11/21/80 11:00 0.091 33 1.54 0.350 0.164 1 10/06/81 0:00 0.090 34 1.49 0.330 0.124 10 10/28/82 16:00 0.090 35 1.45 0.310 0.093 31 1/03/84 1:00 0.089 36 1.41 0.291 C.086 41 6/06/85 22:00 0.089 37 1.37 0.271 0.106 18 1/18/86 16:00 0.088 38 1.33 0.251 B-48 SE 144`''Street-June 2007 0.155 3 10/26/86 0:00 0.087 39 1.30 0.231 0.079 49 11/11/87 0:00 0.086 40 1.27 0.211 0.095 29 8/21/89 17:00 0.086 41 1.29 0.191 0.164 2 1/09/90 6:00 0.085 42 1.21 0.171 0.155 4 11/24/90 8:00 0.082 43 1.18 0.151 0.092 32 1/27/92 15:00 0.080 44 1.15 0.131 0.067 50 11/Ol/92 16:00 0.080 45 1.12 0.111 0.076 48 11/30/93 22:00 0.080 96 1.10 0.091 0.095 30 11/30/99 4:00 0.078 47 1.08 0.071 0.108 17 2/08/96 10:00 0.076 48 1.05 0.051 0.105 19 1/02/97 6:00 0.074 49 1.03 0.031 0.118 13 10/09/97 15:00 0.067 50 1.01 0.011 Computed Peaks 0.187 100.00 0.990 Computed Peaks 0.172 50.00 0.980 ' Computed Peaks 0.157 25.00 0.960 Computed Peaks 0.137 10.00 0.900 Computed Peaks 0.133 8.00 0.875 Computed Peaks 0.122 5.00 0.800 ' Computed Peaks 0.100 2 .00 0.500 Computed Peaks 0.086 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients ' Time Series File:c-100.tsf Mean= -1.001 StdDev= 0.167 Project Location:Sea-Tac Skew= 0.401 , ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------ ' Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob li (CFS) (CFS) Period ��I 0.113 18 2/16/49 21:00 0.250 1 89.50 0.989 0.250 1 3/03/SO 16:00 0.249 Z 32.13 0.969 0.138 9 2/09/51 2:00 0.216 3 19.58 0.99G 0.078 38 1/30/52 8:00 0.188 9 14.08 0.929 0.069 92 3/24/53 15:00 0.169 5 10.99 0.90y 0.096 23 12/19/53 19:00 0.169 6 9.01 0.88: 0.113 19 2/07/55 17:00 0.149 7 7.69 0.869 0.117 16 12/20/55 17:00 0.197 8 6.63 0.849 0.127 13 12/09/56 14:00 0.138 9 5.86 0.829 0.094 25 12/25/57 16:00 0.132 10 5.24 0.809 0.073 41 1/26/59 20:00 0.129 11 4.75 0.789 0.121 14 11/20/59 21:00 0.129 12 4.34 0.769 0.088 31 2/14/61 21:00 0.127 13 3.99 0.799 0.068 43 11/22/61 2:00 0.121 14 3.70 0.729 0.091 28 12/15/62 2:00 0.120 15 3.94 0.709 0.094 26 12/31/63 23:00 0.117 16 3.22 0.690 0.077 39 12/21/64 9:00 0.115 17 3.03 0.670 0.086 39 1/05/66 16:00 0.113 18 2.85 0.650 0.129 11 1/19/67 19:00 0.113 19 2.70 0. 630 0.115 17 8/29/68 16:00 0.111 20 2.56 0.610 0.089 36 12/03/68 16:00 0.105 21 2.44 0.590 0.088 32 1/13/70 22:00 0.105 22 2.32 0.570 0.089 29 12/06/70 8:00 0.096 23 2.22 0.550 0.169 5 2/27/72 7:00 0.096 29 2.13 0.530 0.075 90 1/13/73 2:00 0.094 25 2.09 0.510 0.096 29 11/28/73 9:00 0.094 26 1.96 0.490 0.149 7 12/26/74 23:00 0.093 27 1.89 0.470 0.086 35 12/02/75 20:00 0.091 28 1.82 0.450 0.060 45 8/26/77 2:00 0.089 29 1.75 0.430 0.105 21 9/22/78 19:00 0.088 30 1.70 0.410 0.064 44 9/08/79 15:00 0.088 31 1. 64 0.390 0.120 15 12/19/79 21:00 0.088 32 1.59 0.370 8-49 SE 144"�Street-June 2007 0.105 22 11/21/80 11:00 0.087 33 1.54 0.350 0.188 4 10/06/81 15:00 0.086 39 1.49 0.330 0.088 30 10/28/82 16:00 0.086 35 1.45 0.310 0.093 27 1/03/89 1:00 0.089 36 1.41 0.291 0.056 48 6/06/85 22:00 0.081 37 1.37 0.271 0.147 8 1/18/86 16:00 0.078 38 1.33 0.251 0.132 10 11/24/86 3:00 0.077 39 1.30 0.231 0.059 47 1/14/88 12:00 0.075 40 1.27 0.211 0.055 49 11/05/88 14:00 0.073 91 1.24 0.191 0.249 2 1/09/90 6:00 0.069 92 1.21 0.171 0.216 3 11/24/90 8:00 0.068 43 1.18 0.151 0.087 33 1/27/92 15:00 0.069 44 1 .15 0.131 0.060 46 3/22/93 22:00 0.060 95 1 .12 0.111 0.043 50 11/30/93 22:00 0.060 96 1 .10 0.091 0.081 37 12/27/99 1:00 0.059 47 1 .08 0.071 0.169 6 2/08/96 10:00 0.056 48 1 .05 0.051 0.129 12 1/02/97 6:00 0.055 49 1 .03 0.031 0.111 20 10/04/97 15:00 0.093 50 1.01 0.011 Computed Peaks 0.273 100.00 0.990 Computed Peaks 0.239 50.00 0.980 Computed Peaks 0.206 25.00 0.960 Computed Peaks 0.166 10.00 0.900 Computed Peaks 0.158 8.00 0.875 Computed Peaks 0.137 5.00 0.800 Computed Peaks 0.097 2.00 0.500 Computed Peaks 0.074 1.30 0.231 rlow Frequency Analysis LogPearson III Coefficients Time Series File:c-106.tsf Mean= 0.169 StdDev= 0.122 Project Location:Sea-Tac Skew= 0.511 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.52 20 2/16/49 21:00 3.02 1 89.50 0.989 3.02 1 3/03/50 16:00 2.88 2 32.13 0_969 1.73 12 2/09/51 2:00 2.59 3 19.58 0.949 1.13 42 10/15/51 13:00 2.29 4 19.08 0.929 1.12 44 3/24/53 15:00 2.15 5 10.99 0.909 1.40 27 12/19/53 19:00 1.98 6 9.01 0.889 1.44 23 2/07/55 17:00 1.98 7 7.64 0.869 1.47 22 12/20/55 17:00 1.96 8 6.63 0.849 1.67 15 12/09/56 19:00 1.84 9 5.86 0.829 1.43 29 12/25/57 16:00 1.80 10 5.24 0.809 1.12 93 1/26/59 20:00 1.73 11 4.75 0.789 i 1.41 25 11/20/59 5:00 1.73 12 9.34 0.769 'I 1.33 29 2/19/61 21:00 1.72 13 3.99 0.799 I.17 39 11/22/61 2:00 1.70 19 3.70 0.729 1.25 39 12/15/62 2:00 1.67 15 3.49 0.709 1.91 26 12/31/63 23:00 1.65 16 3.22 0.690 1 .22 37 12/21/64 9:00 1.65 17 3.03 0.670 1.25 36 1/05/66 16:00 1.62 18 2.85 0.650 1.84 9 11/13/66 19:00 1.61 19 2.70 0.630 1.98 6 8/29/68 16:00 1.52 20 2.56 0.610 1.15 41 12/03/68 16:00 1.51 21 2.99 0.590 1.26 33 1/13/70 22:00 1.47 22 2.32 0.570 1.20 38 12/06/70 8:00 1.44 23 2.22 0.550 2.15 5 2/27/72 7:00 1.93 29 2.13 0.530 1.12 95 1/13/73 2:00 1.91 25 2.04 0.510 1.33 30 11/28/73 9:00 1.91 26 1.96 0.490 B-50 SE 144`h Street-June 2007 1.80 10 12/26/79 23:00 1.40 27 1.89 0.470 1.16 40 12/02/75 20:00 1.34 28 1.82 0.950 1.26 32 8/26/77 2:00 1.33 29 1.75 0.430 1.73 11 9/17/78 2:00 1.33 30 1.70 0.410 1.51 21 9/08/79 15:00 1.29 31 1.69 0.390 1.62 18 12/14/79 21:00 1.26 32 1.59 0.370 1.65 16 11/21/80 11:00 1.26 33 1.54 0.350 2.29 4 10/06/81 0:00 1.25 34 1.49 0.330 1.61 19 10/28/82 16:00 1.25 35 1.45 0.310 1.34 28 1/03/89 1:00 1.25 36 1.41 0.291 1.10 97 6/06/85 22:00 1.22 37 1.37 0.271 1.70 19 1/18/86 16:00 1.20 38 1.33 0.251 1.96 8 10/26/86 0:00 1.17 39 1.30 0.231 0.857 99 11/11/87 0:00 1.16 40 1.27 0.211 1.11 96 8/21/89 17:00 1.15 41 1.24 0.191 2.88 2 1/09/90 6:00 1.13 42 1.21 0.171 2.54 3 11/24/90 8:00 1.12 43 1.18 0.151 1.29 31 1/27/92 15:00 1.12 99 1.15 0.131 0.804 50 11/O1/92 16:00 1.12 95 1.12 0.111 0.937 48 11/30/93 22:00 1.11 46 1.10 0.091 1.25 35 11/30/94 9:00 1.10 47 1.08 0.071 1.98 7 2/08/96 10:00 0.937 48 1.05 0.051 1.72 13 1/02/97 6:00 0.857 99 1.03 0.031 1.65 17 10/09/97 15:00 0.804 50 1.01 0.011 Computed Peaks 3.10 100.00 0.990 Computed Peaks 2.79 50.00 0.980 Computed Peaks 2.49 25.00 0.960 Computed Peaks 2.11 10.00 0.900 Computed Peaks 2.04 8.00 0.875 Computed Peaks 1.83 5.00 0.800 Computed Peaks 1.42 2.00 0.500 Computed Peaks 1.17 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-110.tsf Mean= 0.487 StdDev= 0.145 I Project Location:Sea-Tac Skew= 0.484 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 3.35 20 2/16/49 21:00 6.91 1 89.50 0.989 6.79 2 3/03/50 16:00 6.79 2 32.13 0. 969 3.89 9 2/09/51 2:00 6.11 3 19.58 0.949 2.38 40 1/30/52 8:00 5.57 9 14.08 0.929 2.21 44 3/24/53 15:00 4.75 5 10. 99 0.909 2.95 25 12/19/53 19:00 9.66 6 9.01 0.889 3.27 22 2/07/55 17:00 9.31 7 7.64 0.869 3.34 21 12/20/55 17:00 9 .16 8 6.63 0.849 3.77 13 12/09/56 19:00 3.89 9 5.86 0.929 2.95 29 12/25/57 16:00 3.86 10 5.24 0.809 2.22 93 1/26/59 20:00 3.82 11 9.75 0.789 3.38 19 11/20/59 21:00 3.80 12 4.34 0.769 2.65 34 2/14/61 21:00 3.77 13 3. 99 0.749 2 .27 42 11/22/61 2:00 3.74 19 3.70 0.729 2.73 29 12/15/62 2:00 3.61 15 3.94 0.709 2.91 26 12/31/63 23:00 3.99 16 3.22 0.690 2.47 37 12/21/69 9:00 3.97 17 3.03 0.670 2.66 33 1/05/66 16:00 3.91 18 2.85 0.650 3.86 10 11/13/66 19:00 3.38 19 2.70 0. 630 3.80 12 8/29/68 16:00 3.35 20 2.56 0.610 B-51 SE/44`r'Street-June 2007 2.54 36 12/C3/68 16:00 3.39 21 2.94 0.590 2.70 32 1/13/70 22:00 3.27 22 2.32 0.570 2.70 31 12/06/70 8:00 3.02 23 2.22 0.550 9.75 5 2/27/72 7:00 2.95 29 2.13 0.530 2.34 41 1/13/73 2:00 2.95 25 2.04 0.510 2.88 27 11/28/73 9:00 2.91 26 1.96 0.490 9 .31 7 12/26/74 23:00 2.88 27 1.89 0.970 2.58 35 12/02/75 20:00 2.85 28 1.82 0.450 2.19 45 8/26/77 2:00 2.73 29 1.75 0.930 3.97 17 9/22/78 19:00 2.71 30 1.70 0.410 2.96 39 9/08/79 15:00 2.70 31 1.64 0.390 3.61 15 12/19/79 21:00 2.70 32 1.59 0.370 3.91 18 11/21/80 11:00 2.66 33 1.54 0.350 5.57 4 10/06/81 15:00 2.65 34 1.49 0.330 3.02 23 10/28/82 16:00 2.58 35 1.45 0.310 2.85 28 1/03/84 1:00 2.54 36 1.41 0.291 1.97 46 6/06/85 22:OQ 2.47 37 1.37 0.271 , 9 .16 8 1/18/86 16:00 2.97 38 1.33 0.251 3.82 11 11/24/86 3:00 2.46 39 1.30 0.231 1.79 48 1/14/88 12:00 2.38 40 1.27 0.211 1.87 47 11/05/88 14:00 2.39 41 1.24 0.191 6.91 1 1/09/90 6:00 2.27 42 1.21 0.171 6.11 3 11/24/90 8:00 2.22 43 1.18 0.151 2.71 30 1/27/92 15:00 2.21 44 1.15 0.131 1.77 99 3/22/93 22:00 2.19 45 1.12 0.111 1 .58 50 11/30/93 22:00 1.97 46 1.10 0.091 2 .97 38 11/30/99 4:00 1.87 97 1.08 0.071 4 .66 6 2/08/96 10:00 1.79 98 1 .05 0.051 3.74 14 1/02/97 6:00 1.77 99 1.03 0.031 3.99 16 10/04/97 15:00 1.58 50 1.01 0.011 Computed Peaks 7.46 100.00 0.990 Computed Peaks 6.60 50.00 0.980 Computed Peaks 5.78 25.00 0.960 Computed Peaks 4.76 10.00 0.900 Computed Peaks 4.56 8.00 0.875 Computed Peaks 4.01 5.00 0.800 Computed Peaks 2.99 2.00 0.500 Computed Peaks 2.37 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-120.tsf Mean= -0.565 StdDev= 0.101 Project Location:Sea-Tac Skew= 0.475 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.277 21 2/16/49 21:00 0.467 1 89.50 0.989 0.926 4 3/03/50 16:00 0.493 2 32.13 0.969 0.280 20 2/09/51 2:00 0.434 3 19.58 0.949 0.231 38 10/15/51 13:00 0.426 4 19.08 0.929 0.219 45 3/24/53 15:00 0.391 5 10.99 0.909 0.258 27 12/19/53 19:00 0.386 6 9.01 0.889 0.272 23 11/25/54 2:00 0.355 7 7. 64 0.869 0.262 25 11/18/55 15:00 0.351 8 6.63 0.899 0.306 16 12/09/56 14:00 0.336 9 5.86 0.829 0.272 22 12/25/57 16:00 0.324 10 5.29 0.809 0.208 97 11/18/58 13:00 0.322 11 4.75 0.789 0.264 29 11/20/59 5:00 0.320 12 4.34 0.769 0.230 39 2/14/61 21:00 0.315 13 3.99 0.749 0.232 37 11/22/61 2:00 0.313 14 3.70 0.729 B-Sl SE 144`"Street-June 1007 0.230 40 12/15/62 2:00 0.313 15 3.94 0.709 0.262 26 12/3I/63 23:00 0.306 16 3.22 0.690 0.235 36 12/21/64 4:00 0.300 17 3.03 0.670 0.236 35 1/05/66 16:00 0.298 18 2.85 0.650 0.355 7 11/13/66 19:00 0.290 19 2.70 0.630 0.386 6 8/24/68 16:00 0.280 20 2.56 0.610 0.217 93 12/03/68 16:00 0.277 21 2.94 0.590 0.238 39 1/13/70 22:00 0.272 22 2.32 0.570 0.227 41 12/05/70 9:00 0.272 23 2.22 0.550 0.336 9 2/27/72 7:00 0.269 29 2.13 0.530 0.214 46 1/13/73 2:00 0.262 25 2.04 0.510 0.243 32 11/28/73 9:00 0.262 26 1.96 0.490 0.329 10 12/26/74 23:00 0.258 27 1.89 0.470 0.216 44 12/02/75 20:00 0.258 28 1.82 0.450 0.258 28 8/26/77 2:00 0.299 29 1.75 0.430 0.351 8 9/17/78 2:00 0.247 30 1.70 0.410 0.315 13 9/08/79 I5:00 0.244 31 1.69 0.390 0.298 18 12/14/79 21:00 0.243 32 1.59 0.370 0.322 11 11/21/80 11:00 0.239 33 1.54 0.350 0.443 2 10/06/81 0:00 0.238 34 1.49 0.330 0.320 12 10/28/82 16:00 0.236 35 1.45 0.310 0.249 29 1/03/84 1:00 0.235 36 1.41 0.291 0.220 42 6/06/85 22:00 0.232 37 1.37 0.271 0.300 17 1/18/86 16:00 0.231 38 1.33 0.251 0.391 5 10/2E/86 0:00 0.230 39 1.30 0.231 0.185 49 11/11/87 0:00 0.230 90 1.27 0.211 0.239 33 8/21/89 17:00 0.227 91 1.24 0.191 0.467 1 1/09/90 6:00 0.220 92 1 .21 0.171 0.434 3 11/24/90 8:00 0.217 93 1.18 0.151 0.244 31 1/27/92 15:00 0.216 94 1.15 0.131 0.169 50 11/O1/92 16:00 0.214 95 1.12 0.111 0.193 48 11/30/93 22:Q0 0.214 46 1.10 0.091 0.247 30 11/30/94 9:00 0.208 97 1.08 0.071 0.313 15 2/O8/96 10:00 0.193 48 1.05 0.051 0.290 19 1/02/97 6:00 0.185 49 1.03 0.031 0.313 14 10/09/97 15:00 0.169 50 1.01 0.011 Computed Peaks 0.508 100.00 0.990 Computed Peaks 0.466 50.00 0.980 Computed Peaks 0.425 25.00 0.960 Computed Peaks 0.371 10.00 0_900 Computed Peaks 0.360 8.00 0.975 Computed Peaks 0.329 5.00 0.800 Computed Peaks 0.268 2.00 0.500 Computed Peaks 0.227 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-130.tsf Mean= 0.015 StdDev= 0. 175 Project Location:Sea-Tac Skew= 0.329 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.16 19 2/16/49 21:00 2.64 1 89.50 0.989 2.69 1 3/03/50 16:00 2.63 2 32.13 0.969 1.97 9 2/09/51 14:00 2.28 3 19.58 0.999 0.811 38 1/30/52 8:00 2.05 9 14.08 0.929 0.699 43 3/24/53 15:00 1.79 5 10.99 0.909 0.990 23 12/19/53 19:00 1.77 6 9.01 0.889 1.18 17 2/07/55 17:00 1.57 7 7.64 0.869 1.22 16 12/20/55 17:00 1.55 8 6.63 0.849 B-53 SE 144�`Street-June 2007 1.33 13 12/09/56 I4:00 1.97 9 5.86 0.829 0.967 25 12/25/57 16:00 1.91 10 5.29 0.809 0.790 91 1/26/59 20:00 1.35 11 9.75 0.789 1.31 14 11/20/59 21:00 1.34 12 4.34 0.769 0.899 39 2/14/61 21:00 1.33 13 3.99 0.799 0.697 92 11/22/61 2:00 1.31 14 3.70 0.729 0.940 29 12/15/62 2:00 1 .26 15 3.44 0.709 0.961 26 12/31/63 23:00 1.22 16 3.22 0.690 0.788 39 12/21/64 4:00 1.18 17 3.03 0.670 0.892 35 1/05/66 16:00 1 .17 18 2.85 0.650 1.35 11 1/19/67 14:00 1.16 19 2.70 0.630 1.16 20 8/29/68 16:00 1.16 20 2.56 0.610 0.869 36 12/03/68 16:00 1 .11 21 2.99 0.590 0.908 30 1/13/70 22:00 1.11 22 2.32 0.570 0.943 28 12/06/70 8:00 0.990 23 2.22 0.550 1.77 6 2/27/72 7:00 0.989 24 2.13 0.530 0.778 90 1/13/73 2:00 0.967 25 2.04 0.510 0.984 29 11/28/73 9:00 0.961 26 1.96 0.990 1.57 7 12/26/79 23:00 0.961 27 1.89 0.470 0.897 32 12/02/75 20:00 0.993 28 1.82 0.450 0.594 47 8/26/77 2:00 0.990 29 1.75 0.430 1.11 21 9/22/78 19:00 0.908 30 1.70 0.410 0.607 46 9/08/79 15:00 0.902 31 1.69 0.390 1.26 15 12/14/79 21:00 0.897 32 1.59 0.370 1.11 22 11/21/80 11:00 0.897 33 1.54 0.350 2.05 4 10/06/81 15:00 0.894 34 1.49 0.330 0.902 31 1/05/83 8:00 0.892 35 1.45 0.310 0.961 27 1/03/89 1:00 0.869 36 1.91 0.291 0.563 49 6/06/85 23:00 0.897 37 1.37 0.271 1.55 8 1/18/86 16:00 0.811 38 1.33 0.251 1.41 10 11/24/86 3:00 0.788 39 1.30 0.231 0.619 95 1/14/88 12:00 0.778 40 1.27 0.211 0.567 98 11/05/88 19:00 0.790 91 1.24 0.191 2.63 2 1/09/90 6:00 0.697 92 1.21 0.171 2.28 3 11/29/90 8:00 0.694 43 1.18 0.151 0.897 33 1/27/92 15:00 0.632 44 1.15 0.131 i 0.632 49 3/22/93 22:00 0.619 45 1.12 0.111 0.413 SO 11/30/93 22:00 0.607 46 1.10 0.091 0.847 37 12/27/99 1:00 0.599 97 1.08 0.071 1.79 5 2/08/96 10:00 0.567 98 1.05 0.051 1.39 12 1/02/97 6:00 0.563 49 1.03 0.031 1.17 18 10/09/97 15:00 0.913 50 1.01 0.011 Computed Peaks 2.90 100.00 0.990 Computed Peaks 2.53 50.00 0.980 Computed Peaks 2.18 25.00 0.960 Computed Peaks 1.75 10.00 0.900 Computed Peaks 1.67 8.00 0.875 Computed Peaks 1.44 5.00 0.800 Computed Peaks 1 .01 2.00 0.500 Computed Peaks 0.759 1 .30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-200.tsf Mean= -0.308 StdDev= 0.195 Project Location:Sea-Tac Skew= 0.500 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.561 18 2/16/49 21:00 1.12 1 89.50 0.989 1.09 2 3/03/50 16:00 1.09 2 32.13 0.969 8-54 SE 144'"Streef-Jurre 2007 � 0.660 9 2/09/51 14:00 0. 987 3 1°.58 0.999 0.398 39 1/30/52 8:00 0.839 9 14.08 0.929 0.358 93 3/29/53 15:00 0.795 5 10.99 0.909 0.475 29 12/19/53 19:00 0.777 6 9.01 0.889 0.559 19 2/07/55 17:00 0.700 7 7.64 0.869 0.562 16 12/20/55 17:00 0.697 8 6.63 0.899 0.607 13 12/09/56 14:00 0.660 9 5.86 0.829 0.462 25 12/25/57 16:00 0.626 10 5.29 0.809 0.369 42 1/26/59 20:00 0.623 11 4.75 0.789 0.569 15 11/20/59 21:00 0.615 12 4.39 0.769 0.435 30 2/14/61 21:00 0.607 13 3.99 0.749 0.339 45 11/22/61 2:00 0.579 19 3.70 0.729 0.438 29 12/15/62 2:00 0.569 15 3.44 0.709 0.477 23 12/31/63 23:00 0.562 16 3.22 0.690 0.395 40 12/21/69 4:00 0.561 17 3.03 0.670 0.435 31 1/05/66 16:00 0.561 18 2.85 0.65C 0.623 11 1/19/67 19:00 0.554 19 2.70 0.630 0.579 14 8/29/68 16:00 0.502 20 2.56 0.610 0.421 36 12/03/68 16:00 0.500 21 2.44 0.590 0.439 32 1/13/70 22:00 0.994 22 2.32 0.570 0.426 35 12/06/70 8:00 0.977 23 2.22 Q.550 0.777 6 2/27/72 7:00 0.975 24 2.13 0.530 0.388 41 1/13/73 2:00 0.462 25 2.04 0.510 0.446 28 11/28/73 9:00 0.959 26 1.96 0.990 0.697 8 12/26/74 23:00 0.457 27 1.89 0.970 0.427 34 12/02/75 20:00 0.946 28 1 .82 0.950 0.346 44 8/26/77 2:00 0.438 29 1.75 0.930 0.502 20 9/22/78 19:00 0.435 30 1 .70 0.410 0.401 38 9/08/79 15:00 0.435 31 1 .69 0.390 0.561 17 12/14/79 21:00 0.434 32 1.59 0.370 0.494 22 11/21/80 11:00 0.432 33 1.54 0.350 0.834 4 10/06/81 15:00 0.427 39 1.99 0.330 0.457 27 10/28/82 16:00 0.426 35 1.45 0.310 0.459 26 1/03/84 1:00 0.421 36 1.41 0.291 0.307 46 6/06/85 22:00 0.407 37 1.37 0.271 0.700 7 1/18/86 16:00 0.401 38 1.33 0.251 0.626 10 11/24/86 3:00 0.398 39 1.30 0.231 0.296 48 1/14/88 12:00 0.395 40 1.27 0.211 0.283 49 8/21/89 17:00 0.388 41 1.24 0.191 1.12 1 1/09/90 6:00 0.364 42 1.21 0.171 0.987 3 11/24/90 8:00 0.358 43 1.18 0.151 0.432 33 1/27/92 15:00 0.346 44 1.15 0.131 0.302 97 3/22/93 22:00 0.339 95 1 .12 0.111 0.259 50 11/30/93 22:00 0.307 46 1.10 0.091 0.907 37 2/18/95 20:00 0.302 97 1.08 0.071 0.795 5 2/08/96 10:00 0.296 98 1.05 0.051 0.615 12 1/02/97 6:00 0.263 99 1.03 0.031 0.500 21 1�/04/97 15:00 0.254 SO 1.01 0.011 Computed Peaks 1.21 100.00 0.990 Computed Peaks 1.06 50.00 0.980 Computed Peaks 0.931 25.00 0.960 Computed Peaks 0.766 10.00 0.900 Computed Peaks 0.733 8.00 0.875 Computed Peaks 0.645 5.00 0.800 Computed Peaks 0.479 2.00 0.500 Computed Peaks 0.380 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-210.tsf Mean= 0.056 StdDev= 0.136 Project Location:Sea-Tac Skew= 0.982 B-55 SF.144'"Street-June 1007 ---Annual Peak Flow Rates--- -----Flow Frequency Analvsis -- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prcb (CFS) (CFS) Period 1.24 19 2/16/49 21:00 2.48 1 89.50 0.98° 2.92 2 3/03/50 16:00 2.42 2 32.13 0.9Eu 1.90 11 2/09/51 2:00 2.20 3 19.58 0.949 0.884 40 1/30/52 8:00 1.97 4 14.08 0.9�° 0.895 44 3/24/53 15:00 1 .72 5 10.99 0.905� 1.10 25 12/19/53 19:00 1.66 6 9.01 0.8��. 1.19 21 2/07/55 17:00 1.56 7 7.64 0.8E� 1.21 20 12/20/55 17:00 1.49 8 6.63 0.84', 1.38 12 12/09/56 14:00 1.46 9 5.86 0.82° 1.11 24 12/25/57 16:00 1.43 10 5.24 0.8�': 0.835 45 1/26/59 20:00 1.40 11 9.75 0.7�,'? 1.18 22 11/20/59 21:00 1.38 12 4.34 0.75° 0.996 33 2/14/61 21:00 1.37 13 3.99 0.749 0.867 43 11/22/61 2:00 1.37 14 3.70 0.729 1.01 30 12/15/62 2:00 1.33 15 3.44 0.709 1.09 26 12/31/63 23:00 1.30 16 3.22 0.690 0.936 39 12/21/64 9:00 1.30 17 3.03 0.670 0.995 34 1/05/66 16:00 1.27 18 2.85 0.650 1.43 10 11/13/66 19:00 1.24 19 2.70 0.630 1.46 9 S/24/68 16:00 1.21 20 2.56 0.610 0.937 38 12/03/68 16:00 1.19 21 2.44 0.590 1.00 31 1/13/70 22:00 1.18 22 2.32 0.570 0.989 35 12/06/70 8:00 1.16 23 2.22 0.550 1.72 5 2/27/72 7:00 1.11 29 2.13 0.530 0.876 41 1/13/73 2:00 1.10 25 2.09 0.510 1.08 27 11/28/73 9:00 1.09 26 1.96 0.490 1.56 7 12/26/74 23:00 1.08 27 1 .89 0.4?0 0.949 36 12/02/75 20:00 1.06 28 1.82 0.450 0.870 42 8/26/77 2:00 1.02 29 1.75 0.93G 1.30 16 9/22/78 19:00 1.01 30 1.70 0.41C 0.999 32 9/08/79 15:00 1.00 31 1.69 0.3°C 1.33 15 12/14/79 21:00 0.999 32 1.59 0.370 1.27 18 11/21/80 11:00 0.996 33 1.54 0.350 1.97 9 10/06/81 15:00 0.995 34 1.49 0.330 1.16 23 10/28/82 16:00 0.989 35 1.45 0.310 1 .06 28 1/03/89 1:00 0.949 36 1.41 0.291 0.775 46 6/06/85 22:00 0.937 37 1.37 0.2i1 1.49 8 1/18/86 16:00 0.937 38 1.33 0.251 1.37 13 10/26/86 0:00 0.936 39 1.30 0.231 0.656 49 1/14/88 12:00 0.884 40 1.27 0.211 0.712 97 11/05/88 19:00 0.876 91 1.24 0.191 2.48 1 1/09/90 6:00 0.870 92 1.21 0.171 2.20 3 11/24/90 8:00 0.867 43 1.18 0.151 1.02 29 1/27/92 15:00 0.845 94 1.15 0.131 0.643 49 3/22/93 22:00 0.835 95 1.12 0.111 0.636 50 11/30/93 22:00 0.775 46 1.10 O.OG1 0.937 37 11/30/99 9:00 0.712 97 1.08 0.071 1.66 6 2/08/96 10:00 0.656 98 1.05 0.051 1.37 19 1/02/97 6:00 0.643 49 1.03 0.031 1.30 17 10/04/97 15:00 0.636 50 1.01 0.011 Computed Peaks 2.63 100.00 0.990 Computed Peaks 2.34 50.00 0.9fiG Computed Peaks 2.07 25.00 0.960 Computed Peaks 1.72 10.00 0.900 Computed Peaks 1.66 8.00 0.875 Computed Peaks 1 .97 5.00 0.8G0 B-?6 SE I44'"Slreet-June 200? Computed Peaks l.11 2.00 0.500 Computed Peaks 0.893 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-220.tsf Mean= -0.235 StdDev= C. 114 Project Location:Sea-Tac Skew= 0.400 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.601 21 2/16/99 21:00 1.09 1 89.50 0.989 1.04 2 3/03/50 16:00 1.04 2 32.13 0.969 0.624 19 2/09/51 2:00 0.989 3 19.58 0.999 0.466 40 10/15/51 13:00 0.955 4 14.08 0.929 0.453 44 3/29/53 15:00 0.823 5 10. 99 0.909 0.557 26 12/19/53 19:00 0.811 6 9.01 0.889 0.571 23 11/25/54 2:00 0.772 7 7.64 0.869 0.558 25 11/18/55 15:00 0.765 8 6.63 0.849 0.672 14 12/09/56 19:00 0.723 9 5.86 0.829 0.584 22 12/25/57 16:00 0.713 10 5.24 0.809 0.432 97 11/18/58 13:00 0.702 11 9 .75 0.789 0.567 24 11/20/59 5:00 0.688 12 9 .34 0.769 0.501 36 2/19/61 21:00 0.683 13 3.99 0.749 ' 0.488 38 11/22/61 2:00 0.672 14 3.70 0.729 0.501 35 12/15/62 2:00 0.666 15 3.44 0.709 0.556 27 12/31/63 23:00 0.660 16 3.22 0.690 0.497 37 12/21/69 4:00 0.658 17 3.03 0.670 0.503 39 1/05/66 16:00 0.691 18 2.85 0.650 0.765 8 11/13/66 19:00 0.624 19 2.70 0.630 0.823 5 8/24/68 16:00 0.622 20 2.56 0.610 0.460 41 12/03/68 16:00 0.601 21 2.94 0.590 0.508 33 1/13/70 22:00 0.584 22 2.32 0.570 0.487 39 12/06/70 8:00 0.571 23 2.22 0.550 0.772 7 2/27/72 7:00 0.567 24 2.13 0.530 0.995 96 1/13/73 2:00 0.558 25 2.09 0.510 0.545 28 11/28/73 9:00 0.557 26 1.96 0.490 0.723 9 12/26/74 23:00 0.556 27 1.89 0.470 0.460 42 12/02/75 20:00 0.545 28 1.82 0.450 0.520 31 8/26/77 2:00 0.540 29 1.75 0.430 0.713 10 9/17/78 2:00 0.524 30 1.70 0.410 0.622 20 9/O8/79 15:00 0.520 31 1 .64 0.390 0.658 17 12/19/79 21:00 0.518 32 1.59 0.370 0.683 13 11/21/80 11:00 0.508 33 1.54 0.350 0.955 4 10/06/81 0:00 0.503 34 1.49 0.330 0.666 15 10/28/82 16:00 0.501 35 1.95 0.310 0.540 29 1/03/84 1:00 0.501 36 1.41 0.291 0.953 95 6/06/85 22:00 0.497 37 1.37 0.271 0.660 16 1/18/86 16:00 0.988 38 1.33 0.251 0.811 6 10/26/86 0:00 0.487 39 1.30 0.231 0.351 49 11/11/87 0:00 0.466 40 1.27 0.211 Q.955 93 8/21/89 17:00 0.960 91 1.24 0.191 1 .09 1 1/09/90 6:00 0.460 92 1 .21 0.171 0.989 3 11/24/90 8:00 0.955 43 1.18 0.151 � 0.524 30 1/27/92 15:00 0.453 44 1.15 0.131 0.330 50 11/O1/92 I6:00 0.453 45 1.12 0.111 0.386 48 11/30/93 22:00 0.445 46 1.10 0.091 0.518 32 11/30/99 9:00 0.432 47 1.08 0.071 0.702 11 2/08/96 10:00 0.386 48 1.05 0.051 0.691 18 1/02/97 6:00 0.351 99 1.03 0.031 0.688 12 10/04/97 15:00 0.330 50 1.01 0.011 B-57 SE 144`�'Stree�-June 1007 Computed Peaks 1.16 100.00 0.990 Computed Peaks 1.05 50.00 0.980 Computed Peaks 0.953 25.00 0.960 Computed Peaks 0.822 10.0o 0.900 Computed Peaks 0.795 8.00 0.875 Computed Peaks 0.721 5.00 0.800 Computed Peaks 0.572 2.00 0.500 Computed Peaks 0.474 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-220rd.tsf Mean= -0.991 StdDev= 0.418 Project Location:Sea-Tac Skew= 0.698 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.039 38 2/22/99 22:00 0.935 5.13 1 89.50 0.989 0.110 19 3/05/50 6:00 0.681 5.10 2 32.13 0.969 0.489 6 2/09/51 15:00 0.575 5.08 3 19.58 0.949 0.035 43 2/04/52 8:00 0.569 5.08 9 14.08 0.929 0.099 22 1/18/53 21:00 0.523 5.07 5 10.99 0.909 0.064 35 1/07/54 20:00 0.489 5.06 6 9.01 0.889 0.040 36 2/08/55 22:00 0.483 5.06 7 7.69 0.869 0.159 12 1/06/56 10:00 0.478 5.06 8 6.63 0.899 0.067 34 2/26/57 4:00 0.389 5.04 9 5.86 0.829 0.100 21 1/17/58 7:00 0.277 5.02 10 5.24 0.809 0.040 37 1/27/59 1:00 0.160 4.87 11 4.75 0.789 0.478 8 11/20/59 21:00 0.159 4.86 12 4.34 0.769 0.134 16 11/29/60 10:00 0.152 4.82 13 3.99 0.749 0.035 96 12/24/61 6:0� 0.141 4.77 14 3.70 0.729 0.087 27 11/26/62 10:00 0.138 4.75 15 3.44 0.709 0.100 20 11/19/63 16:00 0.134 9.73 16 3.22 0.690 0.138 15 11/30/64 14:00 0.120 4.63 17 3.03 0.670 0.077 33 1/06/66 21:00 0.114 4.58 18 2.85 0.650 0.114 18 12/13/66 11:00 0.110 9.54 19 2.70 0.630 I 0.082 29 1/20/68 19:00 0.100 4.41 20 2.56 0.610 0.080 30 12/11/68 6:00 0.100 4.41 21 2.99 0.590 0.093 23 1/27/70 2:00 0.099 4.38 22 2.32 0.570 0.087 28 12/07/70 5:00 0.093 4 .30 23 2.22 0.550 0.983 7 3/06/72 19:00 0.093 4 .29 29 2.13 0.530 0.152 13 12/26/72 5:00 0.092 4.28 25 2.04 0.510 0.090 26 1/16/79 18:00 0.090 4.26 26 1.96 0.490 0.039 39 1/19/75 2:00 0.087 4.22 27 1.89 0.470 � 0.078 32 12/09/75 2:00 0.087 4.21 28 1.82 0.450 0.031 49 8/26/7? 8:00 0.082 4.15 29 1.75 0.430 0.120 17 12/15/77 17:00 0.080 9.13 30 1.70 0.410 0.032 48 2/13/79 1:00 0.080 9.13 31 1. 64 0.390 0.277 10 12/17/79 17:00 0.078 9.11 32 1.59 0.370 0.092 25 12/30/80 16:00 0.077 9.10 33 1.54 0.350 0.681 2 10/06/81 16:00 0.067 9 .02 34 1.99 0.330 0.080 31 1/06/83 14:00 0.064 9.01 35 1.95 0.310 0.035 95 12/10/83 21:00 0.090 3.85 36 1.41 0.291 0.037 41 11/04/84 8:00 0.040 3.78 37 1.37 0.271 0.141 14 1/18/86 23:00 0.039 3.71 38 1.33 0.251 0.569 4 11/24/86 9:00 0.039 3.67 39 1.30 0.231 0.038 40 12/10/87 8:00 0.038 3.49 40 1.27 0.211 0.035 44 11/05/88 23:00 0.037 3.16 41 1.24 0.191 0.935 1 1/09/90 8:00 0.037 3.13 92 1.21 0.171 0.523 5 11/29/90 11:00 0.035 3.01 43 1.18 0.151 0.093 24 1/31/92 6:00 0.035 3.00 49 1.15 0.131 B-58 SE 14�''Street-June 2�07 0.039 47 1/26/93 5:00 0.035 2.92 45 1.12 0.111 0.03Q 50 2/17/94 23:00 0.035 2.90 46 1.10 0.091 � 0.160 11 12/27/94 6:00 0.034 2.75 47 1.08 0.071 0.575 3 2/08/96 11:00 0.032 2.93 48 1.05 0.051 I; 0.389 9 1/02/97 10:00 0.031 2.31 49 1.03 0.031 0.037 42 1/25/98 0:00 0.030 2.22 50 1.01 0.011 Computed Peaks 1.55 5.20 100.00 0.990 Computed Peaks 1.04 5.15 50.00 0.980 Computed Peaks 0. 678 5.10 25.00 0.960 Computed Peaks 0.368 5.09 10.00 0.900 Computed Peaks 0.323 5.03 5.00 0.875 I Computed Peaks 0.219 5.01 5.00 0.800 Computed Peaks 0.091 9.27 2.00 0.500 Computed Peaks 0.098 3.96 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-230.tsf Mean= 0.197 StdDev= 0.103 Project Location:Sea-Tac Skew= 0.461 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.60 21 2/16/49 21:00 2.72 1 89.50 0.989 2.99 9 3/03/50 16:00 2.57 2 32.13 0.969 1.69 20 2/09/51 2:00 2.53 3 19.58 0.949 1.32 40 10/15/51 13:00 2.49 4 14.08 0.929 1.23 46 3/24/53 15:00 2.24 5 10.99 0.909 1.49 27 12/19/53 19:00 2.22 6 9.Q1 0.889 1.57 22 11/25/59 2:00 2.05 7 7.69 0.869 1.52 25 11/18/55 15:00 2.00 8 6.63 0.899 1.77 16 12/09/56 19:00 1.96 9 5.86 0.829 1.57 23 12/25/57 16:00 1.88 10 5.24 0.809 1.21 97 11/18/58 13:00 1.86 11 4.75 0.789 1.54 29 11/20/59 5:00 1.89 12 9.34 0.769 1 .33 38 2/14/61 21:00 1.83 13 3.99 0.74° 1.33 37 11/22/61 2:00 1.81 19 3.70 0.729 � 1.33 39 12/15/62 2:00 1.80 15 3.94 0.709 1 .52 26 12/31/63 23:00 1.77 16 3.22 0.690 1.36 36 12/21/69 4:00 1.75 17 3.03 0.670 1.37 34 1/05/66 16:00 1.73 18 2.85 0.650 2.05 7 11/13/66 19:00 1.68 19 2.70 0.630 2.22 6 8/29/68 16:00 1.69 20 2.56 0.610 1.26 92 12/03/68 16:00 1.60 21 2.44 0.590 1.38 33 1/13/70 22:00 1.57 22 2.32 0.570 1.31 91 12/06/70 8:00 1.57 23 2.22 0.550 1.96 9 2/27/72 7:00 1.54 24 2.13 0.530 1.29 45 1/13/73 2:00 1.52 25 2.09 0.510 1.40 32 11/28/73 9:00 1.52 26 1.96 0.490 1.88 10 12/26/79 23:00 1.49 27 1.89 0.470 1.25 94 12/02/75 20:00 1.97 28 1.82 0.450 1.47 28 8/26/77 2:00 1.94 29 1.75 0.430 2.00 8 9/17/78 2:00 1.92 30 1.70 0.410 1.80 15 9/08/79 15:00 1.91 31 1.69 0.390 1.73 18 12/14/79 21:00 1.90 32 1.59 0.370 1.86 11 11/21/80 11:00 1.38 33 1.59 0.350 2.57 2 10/06/81 0:00 1.37 34 1.49 0.330 1.84 12 10/28/82 16:00 1.36 35 1.45 0.310 1.44 29 1/03/84 1:00 1.36 36 1.91 0.291 1.26 93 6/06/85 22:00 1.33 37 1.37 0.271 1.75 17 1/18/86 16:00 1.33 38 1.33 0.251 B-59 SE 144'''Srreet-June 2007 2.24 5 1C/26i�6 O:OQ 1 .33 39 1 .30 0.231 1.05 49 11/11/87 0:00 1.32 90 1.27 0.211 1.36 35 8/21/89 17:00 1.31 41 1.29 0.191 2.72 1 1/09/90 6:00 1.26 92 1.21 0.171 2.53 3 11/24/90 8:00 1.26 93 1.18 0.151 1.41 31 1/27/92 15:00 1.25 99 1.15 0. 131 0.962 50 11/O1/92 16:00 1.29 95 1.12 0. 111 1.10 48 11/30/93 22:00 1.23 96 1.10 0.091 1.92 30 11/30/94 4:00 1.21 47 1.08 0.071 1.83 13 2/08/96 10:00 1.10 98 1.05 0.051 1.68 19 1/02/97 6:00 1.05 99 1.03 0.031 1.81 14 10/04/97 15:00 0.962 50 1.01 0.011 Computed Peaks 2.95 100.00 0.990 Computed Peaks 2.70 50.00 0. 980 Computed Peaks 2.96 25.00 0.96C Computed Peaks 2.15 10.00 0. 900 Computed Peaks 2.09 8.00 0.875 Computed Peaks 1.91 5.00 0.800 Computed Peaks 1.55 2.00 0.500 Computed Peaks 1.31 1.30 0 .231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-230rd.tsf Mean= -0.779 StdDev= 0.235 Project Location:Sea-Tac Skew= 1.289 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.118 39 2/22/49 6:00 0.559 7.00 1 89.50 0.989 0.141 17 3/05/50 11:00 0.550 6.95 2 32.13 0.969 0.559 1 2/09/51 20:00 0.989 6.59 3 19.58 0.999 0.108 46 2/04/52 6:00 0.480 6.57 9 14.08 0.929 0.130 29 1/23/53 8:00 0.479 6.56 5 10.99 0.909 0.130 30 1/06/54 12:00 0.478 6.56 6 9.01 0.889 0.129 32 2/08/55 8:00 0.471 6.53 7 7.69 0.869 0.247 11 1/06/56 12:00 0.452 6.95 S 6.63 0.849 0.129 33 2/26/57 9:00 0.907 6.27 9 5.86 0.829 0.136 20 1/17/58 8:00 0.291 6.03 10 5.24 0.809 0.119 38 1/24/59 16:00 0.247 5.99 11 4.75 0.789 0.478 6 11/21/59 3:00 0.219 5.76 12 9.39 0.769 0.192 15 11/29/60 17:00 0.218 5.75 13 3.99 0.749 0.109 98 12/24/61 6:00 0.176 5.62 14 3.70 0.729 0.132 26 11/27/62 5:00 0.142 5.42 15 3.49 0.709 0.136 21 11/19/63 18:00 0.192 5.40 16 3.22 0.690 0.218 13 12/O1/69 8:00 0.191 5.33 17 3.03 0.670 0.125 37 1/07/66 3:00 0.190 5.27 18 2.85 0.650 0.136 22 12/15/66 8:00 0.138 5.16 19 2.70 0.630 0.127 34 1/20/68 21:00 O.I36 5.01 20 2.56 0.610 0.125 35 12/11/68 7:00 0.136 4.96 21 2.99 0.59G 0.132 27 1/27/70 4:00 0.136 4.96 22 2.32 0.570 0.139 25 12/07/70 11:00 0.135 4.90 23 2.22 0.550 0.980 4 3/06/72 22:00 0.135 4.89 29 2.13 0.530 0.219 12 12/27/72 18:00 0.134 4.83 25 2.09 0.510 0.135 23 1/16/74 19:00 0.132 4.68 26 1.96 0.49� 0.125 36 12/27/74 10:00 0.132 4.68 27 1.89 0.470 0.131 28 12/09/75 3:00 0.131 9.62 28 1.82 0.950 0.105 97 8/26/77 7:00 0.130 9.54 29 1.75 0.930 0.138 19 12/15/77 21:00 0.130 9.59 30 1 .70 0.910 0.102 99 2/12/79 17:00 0.130 9.59 31 1 . 64 0.390 0.471 7 12/17/79 20:00 0.129 4.48 32 1 .59 0.3?C B-60 SE 144''Srreet-June 2007 0.13C 31 12i'30/80 22:00 0.129 4 .96 33 1 .59 0.350 0.291 10 10/06/81 19:00 0.127 4.31 34 1.99 0.330 0.135 24 1/08/83 3:00 0.125 4.18 35 1.95 0.31C 0.111 49 12/10/83 19:00 0.125 4.18 36 1.41 0.291 0.117 40 11/04/89 0:00 0.125 4.17 37 1.37 0.271 0.176 19 1/19/86 7:00 0.119 3.78 38 1.33 0.251 0.907 9 11/29/86 8:00 0.118 3.72 39 1.30 0.231 0.119 41 12/09/87 22:00 0.117 3.68 40 1.27 0.211 0.113 43 11/05/88 22:00 0.119 3.53 41 1.29 0.191 0.489 3 1/09/90 14:00 0.113 3.96 42 1.21 0.171 0.952 8 4/05/91 6:00 0.113 3.90 43 1 .18 0.151 0.190 18 1/31/92 22:00 0.111 3.33 49 1.15 0.131 0.109 95 3/23/93 12:00 0.109 3.22 45 1.12 0.111 0.098 50 2/17/99 21:00 0.108 3.15 96 1.10 0.091 0.192 16 12/27/99 20:00 0.105 2.98 47 1.08 0.071 0.550 2 2/09/96 9:00 0.104 2.94 48 1.05 0.051 0.479 5 1/02/97 12:00 0.102 2.76 49 1.03 0.031 0.113 42 10/30/97 11:00 0.098 2.59 50 1.01 0.011 Computed Peaks 0.953 7.57 100.00 0.990 Computed Peaks 0.711 7.51 50.00 0.98C Computed Peaks 0.526 6.81 25.00 0.960 Computed Peaks 0.347 6.09 10.00 0.900 Computed Peaks 0.320 6.07 8.00 0.875 Computed Peaks 0.249 5.99 5.00 0.8G0 Computed Peaks 0.150 5.55 2.00 0.5G0 Computed Peaks 0.111 3.30 1 .3C O .�jl Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-232.tsf Mean= -1.477 Stu=�v= 0 .��� Project Location:Sea-Tac Skew= -0.12� ---Annual Peak Flow Rates--- -----Flow Frequency Analys�s------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.041 16 2/16/99 22:00 0.093 1 89.50 0.98� 0.080 5 3/03/50 16:00 0.088 2 32.13 0.9FO 0.088 2 2/09/51 18:00 0.083 3 19.58 0.949 0.028 32 1/30/52 9:00 0.082 9 14.08 0.9�9 0.021 42 1/18/53 19:00 0.080 S 10.99 0.9G9 0.031 27 1/06/59 5:00 0.068 6 9.01 O.SE9 0.054 10 2/07/55 21:00 0.065 7 7.64 0.86� 0.046 13 12/20/55 17:00 0.059 8 6.63 0.849 0.036 21 12/09/56 15:00 0.055 9 5.86 0.829 0.038 20 1/16/58 20:00 0.054 10 5.29 0.809 0.032 24 1/24/59 2:00 0.054 11 4.75 0.789 0.059 8 11/20/59 21:00 0.047 12 4.39 0.769 0.032 22 2/29/61 15:00 0.046 13 3.99 0.749 0.019 49 1/03/62 1:00 0.095 14 3.70 0.729 0.026 36 11/25/62 14:00 0.092 15 3.94 0.709 0.032 25 1/O1/64 18:00 0.041 16 3.22 0.690 0.022 39 11/30/64 12:00 0.040 17 3.03 0.670 0.029 38 1/06/66 3:00 0.040 18 2.85 0.650 0.054 11 1/19/67 19:00 0.039 19 2.70 0.630 0.032 23 2/03/68 23:00 0.038 20 2.56 0.610 0.031 28 12/03/68 17:00 0.036 21 2.99 0.590 0.026 34 1/13/70 23:00 0.032 22 2.32 0.570 0.021 41 12/06/70 8:00 0.032 23 2.22 0.55C 0.065 7 2/28/72 3:00 0.032 24 2.13 0.530 0.029 30 1/13/73 5:00 0.032 25 2.04 0.510 0.031 26 1/15/74 2:00 0.031 26 1 . 96 0.490 B-61 SE 144`"Street-June 200- 0.047 12 12/26/79 23:00 0.031 Zi 1.fi9 0.47C 0.029 29 12/03/75 17:00 0.031 28 1.82 0.950 0.004 50 3/24/77 20:00 0.029 29 1.75 0.430 0.025 37 12/10/77 17:00 0.029 30 1.70 0.410 0.015 46 2/12/79 8:00 0.028 31 1.64 0.390 0.040 17 12/15/79 8:00 0.028 32 1.59 0.370 0.022 40 12/26/80 4:00 0.027 33 1.54 0.350 0.090 18 10/06/81 15:00 0.026 39 1 .49 0.330 0.039 19 1/05/83 8:00 0.026 35 1 .45 0.310 C.026 35 1/24/84 11:00 0.026 36 1.41 0.291 0.012 48 2/11/85 5:00 0.025 37 1.37 0.271 0.068 6 1/18/86 21:00 0.024 38 1.33 0.251 0.055 9 11/24/86 4:00 0.022 39 1.30 0.231 0.021 43 1/14/88 13:00 0.022 40 1.27 0.211 0.013 47 9/05/89 16:00 0.021 41 1.24 0.191 0.093 1 1/09/90 9:00 0.021 42 1.21 0.171 0.082 4 9/05/91 2:00 0.021 93 1.18 0.151 0.027 33 1/27/92 17:00 0.019 44 1.15 0.131 0.028 31 3/23/93 0:00 0.016 95 1.12 0.111 0.008 99 3/03/99 9:00 0.015 96 1.10 0.091 0.092 15 2/19/95 20:00 0.013 97 1.08 0.071 0.083 3 2/09/96 1:00 0.012 48 1.05 0.051 0.045 14 1/02/97 9:00 0.008 49 1.03 0.031 0.016 45 1/07/98 9:00 0.009 50 1 .01 0.011 Computed Peaks 0.110 100.00 0.990 Computed Peaks 0.097 50.00 0.980 Computed Peaks 0.083 25.00 0.960 Computed Peaks 0.066 10.00 0.900 Computed Peaks 0.062 8.00 0.875 Computed Peaks 0.053 5.00 0.800 Computed Peaks 0.039 2.00 0.500 Computed Peaks 0.022 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-240.tsf Mean= 0.137 StdDev= 0.119 � Project Location:Sea-Tac Skew= 0.402 I ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period ', 1 .42 21 2/16/49 21:00 2.57 1 89.50 0.989 I 2.99 2 3/03/50 16:00 2.44 2 32.13 0.969 1 .97 19 2/09/51 2:00 2.33 3 19.58 0.999 1 .10 40 10/15/51 13:00 2.25 4 14.08 0.929 1 .07 49 3/29/53 15:00 1.99 5 10.99 0.909 1 .31 25 12/19/53 19:00 1.91 6 9.01 0.889 � 1 .39 23 11/25/54 2:00 1.82 7 7.64 0.869 1 .31 26 11/18/55 15:00 1.80 8 6. 63 0.849 1 .58 19 12/09/56 14:00 1.70 9 5.86 0.829 1.38 22 12/25/57 16:00 1.68 10 5.24 0.8C9 1.02 47 11/18/58 13:00 1.65 11 4.75 0.789 I 1.33 24 11/20/59 5:00 1.62 12 9.34 0.769 � 1.18 35 2/14/61 21:00 1.61 13 3.99 0.799 1.15 38 11/22/61 2:00 1.58 14 3.70 0.729 1.18 36 12/15/62 2:00 1.57 15 3.49 0.709 1.31 27 12/31/63 23:00 1.55 16 3.22 0.690 1.17 37 12/21/64 9:00 1.55 17 3.03 0.670 1.18 34 1/05/66 16:00 1.51 18 2.85 0.650 1.80 8 11/13/66 19:00 1.97 19 2.70 0.630 1.99 5 8/24/68 16:00 1.96 20 2.56 0. 610 B-62 Sh.�144`''Street-June 1007 1.08 41 12/03/68 16:00 1.42 21 2.44 0.590 1.20 33 1/13/70 22:00 1.38 22 2.32 0.570 1.15 39 12/06/70 8:00 1.39 23 2.22 0.550 1.82 7 2/27/72 7:00 1.33 29 2.13 0.530 1.05 46 1/13/73 2:00 1.31 25 2.04 0.510 1.28 28 11/28/73 9:00 1.31 26 1 .96 0.490 1.70 9 12/26/74 23:00 1.31 27 1.89 0.470 1.08 42 12/02/75 20:00 1.28 28 1 .82 0.450 1.23 31 8/26/77 2:00 1.27 29 1.75 0.430 1.68 10 9/17/78 2:00 1.23 30 1.70 0.410 1.46 20 9/08/79 15:00 1.23 31 1.69 0.390 1.55 17 12/14/79 21:00 1.22 32 1.59 0.3i0 1.61 13 11/21/80 11:00 1 .20 33 1.54 0.350 2.25 4 10/06/81 0:00 1.18 34 1.49 0.330 1.57 15 10/28/82 16:00 1.18 35 1.45 0.310 1.27 29 1/03/84 1:00 1.18 36 1.41 0.291 1.07 45 6/06/85 22:00 1.17 37 1.37 0.271 1.55 16 1/18/86 16:00 1.15 38 1.33 0.251 1.91 6 10/26/86 0:00 1.15 39 1.30 0.231 0.828 99 11/11/87 0:00 1.10 40 1.27 0.211 ' 1.07 93 8/21/89 17:00 1.08 91 1.24 0.191 2.57 1 1/09/90 6:00 1.08 92 1.21 0.171 2.33 3 11/29/90 8:00 1.07 43 1.18 0.151 1.23 30 1/27/92 15:00 1.07 94 1.15 0.131 0.778 50 11/O1/92 16:00 1.07 95 1.12 0.111 0.911 48 11/30/93 22:00 1.05 96 1.10 0.091 1.22 32 11/30/94 4:00 1.02 47 1.08 O.Oil 1.65 11 2/08/96 10:00 0.911 48 1.05 0.051 1.51 18 1/02/97 6:00 0.828 49 1.03 0.031 1.62 12 10/04/97 15:00 0.778 50 1.01 0.011 Computed Peaks 2.72 100.00 0.9°C Computed Peaks 2.48 50.00 0.980 Computed Peaks 2.24 25.00 0.960 Computed Peaks 1.99 10.00 0.900 Computed Peaks 1.87 8.00 0.8i5 Computed Peaks 1.70 5.00 0.800 Computed Peaks 1.35 2.00 0.500 Computed Peaks 1.12 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-240rd.tsf Mean= -0.255 StdDev= 0. 169 Project Location:Sea-Tac Skew= 1.275 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.471 30 2/17/49 1:00 1.34 4.97 1 89.50 0.989 0.524 18 3/04/50 4:00 1.26 4.89 2 32.13 0.969 1.34 1 2/09/51 19:00 1.26 4.89 3 19.58 0.949 0.416 44 1/30/52 11:00 1.21 4.79 4 14.08 0. 929 0.932 40 9/30/53 17:00 1.21 4.79 5 10.99 0.909 0.984 25 1/06/59 7:00 1.16 4.63 6 9.01 0.889 0.570 11 2/08/55 0:00 1.15 9.61 7 7.69 0.869 0.533 16 12/22/55 15:00 1.08 9.93 8 6.63 0.899 0.512 19 12/09/56 18:00 0.998 4.20 9 5.86 0.829 0.487 29 1/16/SS 23:00 0.943 4.08 10 5.24 0.809 0.459 32 10/19/58 9:00 0.570 3.66 11 4.75 0.789 1.15 7 11/20/59 23:00 0.565 3.61 12 4.34 0.769 0.490 23 11/20/60 16:00 0.553 3.46 13 3.99 0.749 0.382 47 1/03/62 3:00 Q.543 3.39 19 3.70 0.?29 B-63 SE 14�'"Street-J:me 200? 0.983 27 11i25/62 16:00 0.535 3.29 15 3.49 0.709 0.973 28 1/O1/64 20:00 0.533 3.22 16 3.22 0.690 0.999 21 11/24/64 10:00 0.528 3.16 17 3.03 0.670 0.921 43 12/28/65 17:00 0.524 3.11 18 2.85 0.650 0.593 14 1/19/67 19:00 0.512 2.96 19 2.70 0.630 0.992 38 2/19/68 4:00 0.508 2.92 20 2.56 0.610 0.471 29 12/03/68 22:00 0.999 2.82 21 2.99 0.590 0.469 31 1/14/70 19:00 0.497 2.80 22 2.32 0.570 0.508 20 12/06/70 19:00 0.490 2.73 23 2.22 0.550 0.998 9 2/28/72 7:00 0.487 2.69 24 2.13 0.530 0.440 39 12/26/72 6:00 0.484 2.65 25 2.09 0.510 0.448 36 1/15/74 8:00 0.483 2.65 26 1.96 0.490 0.553 13 12/27/74 6:00 0.483 2.69 27 1.89 0.470 0.497 22 12/04/75 1:00 0.973 2.53 28 1.82 0.450 0.359 49 8/24/77 0:00 0.971 2.51 29 1.75 0.430 0.483 26 9/23/78 11:00 0.471 2.51 30 1.70 0.910 0.387 46 11/19/78 8:00 0.469 2.98 31 1.69 0.390 0.993 10 12/15/79 9:00 0.959 2.38 32 1.59 0.370 0.426 42 11/21/80 14:00 0.457 2.36 33 1.59 0.350 1.26 3 10/06/81 17:00 0.455 2.39 34 1.49 0.330 0.528 17 1/05/83 15:00 0.450 2.30 35 1.45 0.310 0.409 45 1/29/84 13:00 0.448 2.28 36 1.41 0.291 0.455 39 6/07/85 7:00 0.994 2.24 37 1.37 0.271 1.08 8 1/18/86 22:00 0.992 2.21 38 1 .33 0.251 1.16 6 11/24/86 7:00 0.990 2.20 39 1.30 0.231 0.927 41 1/14/88 19:00 0.432 2.11 40 1.27 0.211 0.368 48 11/05/88 19:00 0.427 2.06 41 1.24 0.191 1.26 2 1/09/90 11:00 0.426 2.05 42 1.21 0.171 1 .21 9 4/05/91 3:00 0.421 2.01 93 1.18 0.151 0.994 37 1/28/92 10:00 0.416 1_96 49 1 .15 0.131 0.950 35 3/23/93 5:00 0.409 1.89 95 1 .12 0.111 ' 0.333 50 12/Ol/93 16:00 0.387 1.70 96 1.10 0.091 0.535 15 2/19/95 22:00 0.382 1.66 97 1.08 0.071 1.21 5 2/09/96 3:00 0.368 1.53 48 1.05 0.051 0.565 12 1/02/97 12:00 0.359 1.96 49 1.03 0.031 0.957 33 10/30/97 9:00 0.333 1.26 50 1.01 0.011 Computed Peaks 1.93 5.23 100.00 0.99Q Computed Peaks 1.56 5.10 50.00 0.980 Computed Peaks 1.26 9.89 25.00 0.960 ' Computed Peaks 0.935 9.07 10.00 0.900 Computed Peaks 0.881 3.99 8.00 0.875 Computed Peaks 0.736 3.89 5.00 0.800 Computed Peaks 0.512 2.97 2.00 0.5GG Computed Peaks 0.411 1.91 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-291.tsf Mean= 0.052 StdDev= 0.119 Project Location:Sea-Tac Skew= 0.403 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.17 21 2/16/49 21:00 2.12 1 89.50 0.989 2.02 2 3/03/50 16:00 2.02 2 32.13 0.969 1.21 19 2/09/51 2:00 1.93 3 19.58 0.949 0.902 40 10/15/51 13:00 1.85 9 14.08 0.929 0.879 44 3/24/53 15:00 1.59 5 10.99 0.909 1.08 25 12/19/53 19:00 1.57 6 9.01 0.889 1.11 23 11/25/54 2:00 1.50 7 7.64 Q.86G 1.08 26 11/18/55 15:00 1 .9E 8 5. 63 0. �49 B-6a SE 14•t"'Street-June 20r1' 1.3C 14 12�'0°!56 14:00 1 .40 9 5.86 0.8�9 1.13 22 12/25/57 16:00 1 .38 10 5.24 0.809 0.838 47 11/18/58 13:00 1.37 11 9.75 0.789 1.10 24 11/20/59 5:00 1.33 12 9.34 0.769 0.972 36 2/14/61 21:00 1.32 13 3.99 0.749 0.943 39 11/22/61 2:00 1.30 19 3.70 0.729 0.973 35 12/15/62 2:00 1.29 15 3.49 0.709 1.08 27 12/31/63 23:00 1.29 16 3.22 0.690 0.964 37 12/21/69 4:00 1.27 17 3.03 0.670 0.976 39 1/05/66 16:00 1.24 18 2.85 0.650 1.48 8 11/13/66 19:00 1.21 19 2.70 0.630 1.59 5 8/29/68 16:00 1.20 20 2.56 0.610 0.893 42 12/03/68 16:00 1.17 21 2.44 0.590 0.985 33 1/13/70 22:00 1 .13 22 2.32 0.570 0.995 38 12/06/70 8:00 1.11 23 2.22 0.550 1.50 7 2/27/72 7:00 1 .10 29 2.13 0.530 0.869 96 1/13/73 2:00 1.08 25 2.09 0.510 1.06 28 11/28/73 9:00 1.08 26 1.96 0.490 1.40 9 12/26/74 23:00 1.08 27 1.89 0.970 0.894 41 12/02/75 20:00 1.06 28 1.82 0.950 1.01 31 8/26/77 2:00 1.05 29 1.75 0.930 1.38 10 9/17/78 2:00 1.02 30 1.70 0.910 1.20 20 9/08/79 15:00 1.01 31 1.64 0.39u 1.27 17 12/14/79 21:00 1.00 32 1.59 0.3?0 1.32 13 11/21/80 11:00 0.985 33 1.54 0.350 1.85 9 10/06/81 0:00 0.976 39 1.99 0.330 1.29 15 10/28/82 16:00 0.973 35 1.95 0.310 1.05 29 1/03/84 1:00 0.972 36 1.91 0.291 0.877 45 6/06/85 22:00 0.969 37 1.37 0.271 1.29 16 1/18/86 16:00 0.995 38 1.33 0.251 1 .57 6 10/26/86 0:00 0.993 39 1.30 0.231 0.680 49 11/11/87 0:00 0.902 40 1.27 0.211 0.881 43 8/21/89 17:00 0.899 91 1.24 0.191 2.12 1 1/09/90 6:00 0.893 92 1.21 0.171 1.93 3 11/29/90 8:00 0.881 93 1.18 0.151 1.02 30 1/27/92 15:00 0.879 99 1.15 0.131 0.639 50 11/O1/92 16:00 0.877 45 1.12 0.111 0.748 98 11/30/93 22:00 0.864 96 1.10 0.091 1.00 32 11/30/99 4:00 0.838 97 1.08 0.0;1 1.37 11 2/08/96 10:00 0.798 48 1.05 0.051 1.29 18 1/02/97 6:00 0.680 49 1.03 0.031 1.33 12 10/04/97 15:00 0.639 50 1.01 0.011 Computed Peaks 2.25 100.00 0.990 Computed Peaks 2.05 50.00 0.980 Computed Peaks 1 .85 25.00 0.960 Computed Peaks 1.60 10.00 0.900 Computed Peaks 1.59 5.00 0.875 Computed Peaks 1.90 5.00 0.800 Computed Peaks 1.11 2.00 0.500 Computed Peaks 0.920 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-249.tsf Mean= 0.350 StdDev= 0.151 Project Location:Sea-Tac Skew= 0.463 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 2.43 21 2/16/49 21:00 5.19 1 89.50 0.989 5.15 2 3/03/50 16:00 5.15 2 32 . 13 0. 969 8-65 SE!4•!'''Street-June 100? 2.87 10 2/09/51 2:06 9 .57 3 19.58 0.949 1.72 39 1/30/52 8:00 9.21 4 19.08 0.929 1.58 44 3/24/53 15:00 3.54 5 10.99 0.909 2.15 25 12/19/53 19:00 3.44 6 9.01 0.889 2.38 22 2/07/55 17:00 3.19 7 7.64 0.869 2.45 20 12/20/55 17:00 3.06 8 6.63 0.849 2.78 12 12/09/56 14:00 2.89 9 5.86 0.829 2.16 24 12/25/57 16:00 2.87 10 5.24 0.809 1.61 43 1/26/59 20:00 2.82 11 4.75 0.789 2.49 19 11/20/59 21:00 2.78 12 4.39 0.769 1.93 33 2/14/61 21:00 2.76 13 3.99 0.749 1.65 92 11/22/61 2:00 2.79 19 3.70 0.729 2.00 29 12/15/62 2:00 2.68 15 3.94 0.709 2.10 27 12/31/63 23:00 2.63 16 3.22 0.690 1.78 38 12/21/64 9:00 2.57 17 3.03 0.670 1.93 34 1/05/66 16:00 2.53 18 2.85 0.650 2.89 9 11/13/66 19:00 2.49 19 2.70 0.630 2.76 13 8/24/68 16:00 2.45 20 2.56 0.610 1.83 36 12/03/68 16:00 2.43 21 2.94 0.590 1.96 32 1/13/70 22:00 2.38 22 2.32 0.570 2.00 30 12/06/70 8:00 2.18 23 2.22 0.550 3.54 5 2/27/72 7:00 2.16 24 2.13 0.530 1.68 40 1/13/73 2:00 2.15 25 2.09 0.510 2.14 26 11/28/73 9:00 2.14 26 1.96 0.490 3.19 7 12/26/74 23:00 2.10 27 1.89 0.470 1.87 35 12/02/75 20:00 2.08 28 1.82 0.450 1.53 95 8/26/77 2:00 2.00 29 1.75 0.430 2.57 17 9/22/78 19:00 2.00 30 1.70 0.910 1.67 91 9/08/79 15:00 1.97 31 1.64 0.390 2.68 15 12/14/79 21:00 1.96 32 1.59 0.370 2.53 18 11/21/80 11:00 1.93 33 1.59 0.350 4.21 4 10/06/81 15:00 1.93 34 1.99 0.330 2.18 23 10/28/82 16:00 1.87 35 1.95 0.310 2.08 28 1/03/84 1:00 1.83 36 1.41 0.291 1.40 46 6/06/85 22:00 1.79 37 1.37 0.271 I 3.06 8 1/18/86 16:00 1.78 38 1.33 0.251 2.82 11 11/24/86 3:00 1.72 39 1.30 0.231 1.30 48 1/14/88 12:00 1 .68 90 1.27 0.211 1.36 97 11/05/88 19:00 1. 67 41 1.29 0.191 5.19 1 1/09/90 6:00 1.65 42 1.21 0.171 4.57 3 11/29/90 8:00 1.61 43 1.18 0.151 1.97 31 1/27/92 15:00 1.58 44 1.15 0.131 1.28 49 3/22/93 22:00 1.53 45 1.12 0.111 1.09 50 11/30/93 22:00 1.90 96 1.10 0.091 1.79 37 11/30/94 4:00 1.36 47 1.08 0.071 3.94 6 2/08/96 10:00 1.30 48 1.05 0.051 2.79 19 1/02/97 6:00 1.28 99 1.03 0.031 2.63 16 10/04/97 15:00 1.09 50 1.01 0.011 Computed Peaks 5.65 100.00 0.990 Computed Peaks 4.97 50.00 0.980 Computed Peaks 9.33 25.00 0.960 Computed Peaks 3.54 10.00 0. 900 Computed Peaks 3.39 8.00 0.875 Computed Peaks 2.97 5.00 0.800 Computed Peaks 2.18 2.00 0.500 Computed Peaks 1.71 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-250.tsf Mean= 0.048 StdDev= 0.126 Project Location:Sea-Tac Skew= 0.396 B-66 SE 144"`S�ree1-June 2007 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.18 20 2/16/99 21:00 2.27 1 89.50 0.989 2.21 2 3/03/50 16:00 2.21 2 32.13 0.969 1.27 18 2/09/51 2:00 2.02 3 19.58 0.949 0.899 99 10/15/51 13:00 1 .88 4 19.08 0.929 0.855 92 3/29/53 15:00 1.58 5 10.99 0.909 1 .08 26 12/19/53 19:00 1.55 6 9.01 0.889 1 .09 25 11/25/54 2:00 1.98 7 7.69 0.869 1 .10 23 12/20/55 17:00 1 .48 8 6.63 0.849 1 .33 19 12/09/56 14:00 1 .46 9 5.86 O.S29 1.12 21 12/25/57 16:00 1 .45 10 5.24 0.809 0.817 46 1/26/59 20:00 1 .35 11 4.75 0.789 1.11 22 11/20/59 5:00 1 .34 12 4.34 0.769 0.972 33 2/14/61 21:00 1 .33 13 3.99 0.799 0.912 39 11/22/61 2:00 1 .33 19 3.70 0.729 0.982 31 12/15/62 2:00 1.30 15 3.44 0.709 1.06 28 12/31/63 23:00 1 .30 16 3.22 0.690 0.941 37 12/21/64 4:00 1 .28 17 3.03 0.670 0.967 35 1/05/66 16:00 1.27 18 2.85 0.650 1 .48 8 11/13/66 19:00 1.23 19 2.70 0.630 1 .55 6 8/24/68 16:00 1.18 20 2.56 0.610 0.889 41 12/03/68 16:00 1 .12 21 2.99 0.590 0.979 32 1/13/70 22:00 1 .11 22 2.32 0.570 0.954 36 12/06/70 8:00 1.10 23 2.22 0.550 1.58 5 2/27/72 7:00 1 .09 29 2.13 0.530 0.845 43 1/13/73 2:00 1 .09 25 2.04 0.510 1.08 27 11/28/73 9:00 1 .08 26 1.96 0.490 1.46 9 12/26/79 23:00 1 .08 27 1.89 0.470 0.895 90 12/02/75 20:00 1 .06 28 1.82 0.950 0.936 38 8/26/77 2:00 1 .05 29 1.75 0.930 1 .35 11 9/22/78 19:00 1.01 30 1.70 0.410 1.09 29 9/08/79 15:00 0.982 31 1.69 0.390 1 .30 16 12/14/79 21:00 0.979 32 1.59 0.370 1 .30 15 11/21/80 11:00 0.972 33 1.59 0.350 1.88 4 10/06/81 15:00 0.972 39 1.49 0.330 1.23 19 10/28/82 16:00 0.967 35 1.95 0.310 1.05 29 1/03/84 1:00 0.959 36 1.91 0.291 0.828 95 6/06/85 22:00 0.941 37 1.37 0.271 1.33 13 1/18/86 16:00 0.936 38 1.33 0.251 1 .48 7 10/26/86 0:00 0.912 39 1.30 0.231 0.696 99 1/14/88 0:00 0.895 40 1.27 0.211 0.774 47 8/21/89 17:00 0.889 41 1.24 0.191 2.27 1 1/09/90 6:00 0.855 42 1.21 0.171 2.02 3 11/29/90 8:00 0.845 93 1.18 0.151 1.01 30 1/27/92 15:00 0.844 99 1.15 0.131 0.600 50 12/10/92 6:00 0.828 95 1.12 0.111 0. 689 98 11/30/93 22:00 0.817 46 1.10 0.091 0. 972 39 11/30/94 9:00 0.774 97 1.08 0.071 1 .95 10 2/08/96 10:00 0.689 48 1.05 0.051 1.28 17 1/02/97 6:00 0.646 49 1.03 0.031 1 .34 12 10/04/97 15:00 0.600 50 1.01 0.011 Computed Peaks 2.39 100.00 0.990 !i Computed Peaks 2.16 50.00 0.980 I Computed Peaks 1.93 25.00 0.960 , Computed Peaks 1 . 64 10.00 0.900 ' Computed Peaks 1 .58 8.00 0.875 Computed Peaks 1 .42 5.00 0.800 B-67 SE 144"Street-Jurre 200? Ccmputed Peaks 1 .10 2.00 0.500 Computed Peaks 0.893 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-260.tsf Mean= -0.230 StdDev= 0. 124 Project Location:Sea-Tac Skew= 0.395 ---Annual Peak Flow Rates--- -----Flow Frequency Analys�s------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.617 20 2/16/99 21:00 1.18 1 89.50 0.9n9 1.14 2 3/03/50 16:00 1.19 2 32.13 0.969 0.660 18 2/09/51 2:00 1 .05 3 19.58 0.999 0.499 43 10/15/51 13:00 0.977 4 19.08 0.929 0.452 92 3/29/53 15:00 0.824 5 10.99 0.909 0.567 26 12/19/53 19:00 0.819 6 9.01 0.889 0.572 25 11/25/54 2:00 0.788 7 7.64 0.869 0.579 24 12/20/55 17:00 0.777 8 6. 63 0.849 0.695 13 12/09/56 14:00 0.760 9 5.86 0.829 0.590 21 12/25/57 16:00 0.752 10 5.29 0.809 0.430 46 11/18/58 13:00 0.711 11 4.75 0.789 0.581 23 11/20/59 5:00 0.704 12 4.39 0.769 0.511 34 2/14/61 21:00 0.695 13 3.99 0.749 0.483 39 11/22/61 2:00 0.695 19 3.70 0.729 0.515 31 12/15/62 2:00 0.687 15 3.94 0.709 0.561 28 12/31/63 23:00 0. 681 16 3.22 0.69G 0.997 38 12/21/64 4:00 0.668 17 3.03 0.670 0.509 35 1/05/66 16:00 0.660 18 2.85 0.6J0 0.777 8 11/13/66 19:00 0.655 19 2.70 0.6?G 0.819 6 8/29/68 16:00 0.617 20 2.56 0.610 0.967 91 12/03/68 16:00 0.590 21 2.44 0.590 0.515 32 1/13/70 22:00 0.584 22 2.32 0.570 0.500 36 12/06/70 8:00 0.581 23 2.22 0.550 0.824 5 2/27/72 7:00 0.574 24 2.13 0.530 0.445 49 1/13/73 2:00 0.572 25 2.09 0.510 0.564 27 11/28/73 9:00 0.567 26 1.96 0.490 0.760 9 12/26/74 23:00 0.569 27 1.89 0.470 0.470 40 12/02/75 20:00 0.561 28 1.82 0.950 0.499 37 8/26/77 2:00 0.550 29 1.75 0.430 0.711 11 9/22/78 19:00 0.531 30 1.70 0.410 0.589 22 9/08/79 15:00 0.515 31 1.64 0.390 0.681 16 12/19/79 21:00 0.515 32 1.59 0.370 0.687 15 11/21/80 11:00 0.514 33 1.54 0.350 0.977 4 10/06/81 15:00 0.511 34 1.99 0.330 0.655 19 10/28/82 16:00 0.509 35 1.45 0.310 0.550 29 1/03/84 1:00 0.500 36 1.41 0.291 0.440 45 6/06/85 22:00 0.499 37 1.37 0.271 0.695 14 1/18/86 16:00 0.997 38 1.33 0.251 0.788 7 10/26/86 0:00 0.983 39 1.30 0.231 0.343 49 1/14/88 0:00 0.970 90 1.27 0.211 0.917 47 8/21/89 17:00 0.467 41 1.24 0.191 1.18 1 1/09/90 6:00 0.452 42 1.21 0.171 1.05 3 11/29/90 8:00 0.449 43 1.18 0.151 0.531 30 1/27/92 15:00 0.445 44 1.15 0.131 0.318 50 12/10/92 6:00 0.440 45 1.12 0.111 0.368 48 11/30/93 22:00 0.930 46 1.10 0.091 0.514 33 11/30/99 4:00 0.917 47 1.08 0.071 0.752 10 2/08/96 10:00 0.368 48 1.05 0.051 0.668 17 1/02/97 6:00 0.343 99 1.03 0.031 0.704 12 10/09/97 15:00 0.318 50 1.01 0.011 B-68 SE 144'"Street-June 200? Computed Peaks 1.24 100.00 0.990 Computed Peaks 1.12 50.00 0.980 Computed Peaks 1.01 25.00 0.960 Computed Peaks 0.857 10.00 0.900 Computed Peaks 0.827 8.00 0.875 Computed Peaks 0.743 5.00 0.800 Computed Peaks 0.577 2.00 0.500 Computed Peaks 0.472 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-260rd.tsf Mean= -0.785 StdDev= 0.291 Project Location:Sea-Tac Skew= 1.218 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.133 36 2/22/49 6:00 1.19 5.21 1 89.50 0.989 0.179 19 3/05/50 7:00 0.942 5.17 2 32.13 0.969 0.942 2 2/09/51 16:00 0.932 5.17 3 19.58 0.949 0.081 42 2/04/52 9:00 0.577 5.11 9 19 .08 0.929 0.152 25 1/12/53 7:00 0.543 5.10 5 10.99 0.909 0.195 31 1/06/59 12:00 0.439 5.07 6 9.01 0.889 0.135 35 2/08/55 15:00 0.303 5.03 7 7.69 0.869 0.191 11 12/22/55 16:00 0.225 5.00 8 6.63 0.849 0.142 33 2/26/57 4:00 0.209 4.99 9 5.86 0.829 0.171 18 1/17/58 8:00 0.200 4.74 10 5.29 0.809 0.125 39 1/24/59 18:00 0.191 4.51 11 4.75 0.789 0.577 4 11/21/59 2:00 0.183 4.32 12 4.39 0.769 0.168 19 11/24/60 17:00 0.181 4.29 13 3.99 0.749 0.072 45 12/24/61 6:00 0.179 4.22 14 3.70 0.729 0.156 22 11/26/62 11:00 0.178 4.21 15 3.44 0.709 0.152 26 11/19/63 18:00 0.173 4.11 16 3.22 0.690 0.183 12 12/O1/64 8:00 0.172 4_08 17 3.03 0.670 0.140 39 1/07/66 3:00 0.171 4.07 18 2.85 0.650 0.172 17 12/13/66 15:00 0.168 4.00 19 2.70 0.630 0.150 27 1/20/68 20:00 0.162 3.89 20 2.56 0.610 0.133 37 12/11/68 7:00 0.162 3.87 21 2.44 0.590 0.145 32 1/27/70 4:00 0.156 3.77 22 2.32 0.570 0.153 24 12/07/70 11:00 0.155 3.74 23 2.22 0.550 0.209 9 3/07/72 1:00 0.153 3.71 29 2.13 0.530 0.173 16 12/27/72 19:00 0.152 3. 69 25 2.04 0.510 0.155 23 1/16/74 19:00 0.152 3.68 26 1 .96 0.490 0.127 38 1/13/75 23:00 0.150 3.65 27 1 .89 0.470 0.150 28 12/04/75 4:00 0.150 3.65 28 1.82 0.450 0.061 50 8/26/77 7:00 0.147 3.59 29 1.75 0.430 0.162 20 12/15/77 19:00 0.146 3.57 30 1.70 0.910 0.066 48 2/13/79 12:00 0.145 3.56 31 1.69 0.390 0.543 5 12/17/79 18:00 0.145 3.56 32 1.59 0.370 0.147 29 12/30/80 21:00 0.192 3.52 33 1.54 0.350 0.200 10 10/07/81 Z:00 0.190 3.48 39 1.49 0.330 0.146 30 1/06/83 19:00 0.135 3.40 35 1.45 0.310 0.073 49 12/13/83 5:00 0.133 3.38 36 1.41 0.291 0.074 43 11/04/84 9:00 0.133 3.38 37 1.37 0.271 0.181 13 1/19/86 11:00 0.127 3.28 38 1.33 0.251 0.225 8 11/24/86 14:00 0.125 3.27 39 1.30 0.231 0.109 40 12/09/87 23:00 0.109 3.09 40 1.27 0.211 0.071 46 11/06/88 0:00 0.105 3.04 41 1.24 0.191 1 .19 1 1/09/90 10:00 0.081 2.96 42 1.21 0.171 0.303 7 4/05/91 7:00 0.074 2.91 43 1.18 0.151 0.162 21 1/31/92 6:00 0.073 2.86 44 1.15 0.131 8-69 SE 144"Street-June 2007 0.070 47 1/26/93 6:00 0.072 2.80 45 1.12 0.111 0.062 49 2/17/94 23:00 0.071 2.74 96 1.10 0.091 0.178 15 12/27/94 20:00 0.070 2.60 47 1.08 0.071 0.932 3 2/09/96 2:00 0.066 2.38 48 1.05 0.051 0.439 6 1/02/97 12:0a 0.062 2.13 99 1.03 0.031 0.105 41 1/24/98 23:00 0.061 1.99 50 1.01 0.011 Computed Peaks 1.36 5.29 100.00 0.99G Computed Peaks 0.959 5.18 50.00 0.980 Computed Peaks 0.666 5.13 25.00 0.960 Computed Peaks 0.403 5.06 10.00 0.900 Computed Peaks 0.369 5.05 8.00 0.875 Computed Peaks 0.268 5.02 5.00 0.800 Computed Peaks 0.144 3.54 2.00 0.500 Computed Peaks 0.097 3.01 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-270.tsf Mean= -0.263 StdDev= 0. 125 Project Location:Sea-Tac Skew= 0.392 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.573 20 2/16/49 21:00 1.10 1 89.50 0.989 1.06 2 3/03/50 16:00 1.06 2 32.13 0.969 0.619 18 2/09/51 2:00 0.982 3 19.58 O.o4G 0.915 43 10/15/51 13:00 0.910 4 19.08 0.92p 0.919 42 3/29/53 15:00 0.768 5 10.99 0.909 0.526 26 12/19/53 19:00 0.758 6 9.01 0.889 0.530 25 11/25/59 2:00 0.728 7 7. 64 0.869 0.534 24 12/20/55 17:00 0.721 8 6.63 0.849 0.646 14 12/09/56 14:00 0.707 9 5.86 0.829 0.547 21 12/25/57 16:00 0.701 10 5.24 0.809 0.399 46 1/26/59 20:00 0.659 11 4.75 0.789 0.540 22 11/20/59 5:00 0.653 12 4.34 0.769 0.474 39 2/19161 21:00 0.697 13 3.99 0.749 0.447 39 11/22/61 2:00 0.646 14 3.70 0.729 0.479 31 12/15/62 2:00 0.637 15 3.44 Q.709 0.520 28 12/31/63 23:00 0.633 16 3.22 0.690 0.960 38 12/21/69 4:00 0.622 17 3.03 0.6?0 0.472 35 1/05/66 16:00 0.619 18 2.85 0.650 0.721 8 11/13/66 19:00 0.606 19 2.70 0.630 0.758 6 8/24/68 16:00 0.573 20 2.56 0.610 0.433 41 12/03/68 16:00 0.597 21 2.49 0.590 0.978 32 1/13/70 22:00 0.590 22 2.32 0.57G 0.464 36 12/06/70 8:00 0.539 23 2.22 0.550 0.768 5 2/27/72 7:00 0.539 24 2.13 0.530 0.913 99 1/13/73 2:00 0.530 25 2.04 0.510 0.529 27 11/28/73 9:00 0.526 26 1.96 0.490 0.707 9 12/26/79 23:00 0.524 27 1.89 0.970 0.436 90 12/02/75 20:00 0.520 28 1.82 0.450 0.461 37 8/26/77 2:00 0.510 29 1.75 0.43Q 0.659 11 9/22/78 19:00 0.492 30 1.70 0.410 0.539 23 9/08/79 15:00 0.979 31 1.64 0.390 0.633 16 12/14/79 21:00 0.478 32 1.59 0.3�0 0.637 15 11/21/80 11:00 0.476 33 1.54 0.350 0.910 4 10/06/81 15:00 0.4�9 39 1.49 0.330 0.606 19 10/28/82 16:00 0.972 35 1.95 0.310 0.510 29 1/03/89 1:00 0.964 36 1.4I 0.291 0.407 45 6/06/85 22:00 0.461 37 1.37 0.271 0.647 13 1/18/86 16:00 0.960 38 1 .33 0.251 B-?0 SE l44"'Street-June 1007 0.728 7 10/26/86 0:00 0.947 39 1.30 0.231 0.317 49 1/14/88 0:00 0.936 40 1.27 0.211 0.383 47 8/21/89 17:00 0.433 41 1.29 0.191 1.10 1 1/09/90 6:00 0.419 42 1.21 0.171 0.982 3 11/24/90 8:00 0.415 43 1.18 0.151 0.992 30 1/27/92 15:00 0.913 44 1.15 0.131 0.294 50 12/10/92 6:00 0.907 45 1.12 0.111 0.339 98 11/30/93 22:00 0.399 46 1.10 0.091 0.976 33 11/30/94 4:00 0.383 47 1.08 0.071 0.701 10 2/08/96 10:00 0.339 48 1.05 0.051 0.622 17 1/02/97 6:00 0.317 49 1.03 0.031 0.653 12 10/04/97 15:00 0.294 50 1.01 0.011 Computed Peaks 1.16 100.00 0.990 Computed Peaks 1.04 50.00 0.980 Computed Peaks 0.936 25.00 0.960 Computed Peaks 0.797 10.00 0.900 Computed Peaks 0.769 8.00 0.875 Computed Peaks 0.690 5.00 0.800 Computed Peaks 0.536 2.00 0.500 Computed Peaks 0.937 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-300.tsf Mean= -0.057 StdDev= 0.172 Project Location:Sea-Tac Skew= 0.335 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1 .02 17 2/16/49 21:00 2.19 1 89.50 0.989 2.17 2 3/03/50 16:00 2.17 2 32.13 0.969 1 .35 8 2/09/51 19:00 1.90 3 19.58 0.949 0.718 38 1/30/52 8:00 1.58 4 19.08 0.929 0.602 42 3/24/53 15:00 1.58 5 10.99 0.909 0.842 21 12/19/53 19:00 1.50 6 9.01 0.889 1.05 16 2/07/55 17:00 1.36 7 7.69 0.869 1.08 15 12/20/55 17:00 1.35 8 6.63 0.849 1.11 14 12/09/56 14:00 1.32 9 5.86 0.829 0.796 27 12/25/57 16:00 1.20 10 5.24 0.809 0. 644 41 1/26/59 20:00 1.20 11 4.75 0.789 1.14 13 11/2Q/59 21:00 1.15 12 4.39 0.769 0.775 32 2/14/61 21:00 1.14 13 3.99 0.749 C.543 45 11/22/61 2:00 1.11 14 3.70 0.729 0.791 29 12/15/62 2:00 1.08 15 3.44 0.709 0.838 22 12/31/63 23:00 1.05 16 3.22 0.690 0.672 40 12/21/64 4:00 1.02 17 3.03 0.670 0.771 39 1/05/66 16:00 1.02 18 2.85 0.650 1.20 11 1/19/67 14:00 0.919 19 2.70 0.630 0.919 19 8/24/68 16:00 0.855 20 2.56 0.610 0.763 35 12/03/68 16:00 0.842 21 2.49 0.590 0.775 31 1/13/70 23:00 0.838 22 2.32 0.570 0.774 33 12/06/70 5:00 0.831 23 2.22 0.550 1.50 6 2/27/72 7:00 0.829 29 2.13 0.530 0.686 39 1/13/73 2:00 0.815 25 2.04 0.510 0.793 28 11/28/73 9:00 0.807 26 1. 96 0.490 1.32 9 12/26/74 23:00 0.796 27 1.89 0.970 ' Q.782 30 12/02/75 20:00 0.793 28 1.82 0.950 I 0.512 97 8/26/77 2:00 0.791 29 1.75 0.930 C.829 24 9/22/78 19:00 0.782 30 1.70 0.410 0.563 44 9/08/79 15:00 0.775 31 1.64 0.390 1.02 18 12/14/79 21:00 0.775 32 1.59 0.370 B-71 SE 14��Street-J�me 7007 0.831 23 11/21/80 11:00 0.774 33 1.54 0.350 1.58 4 10/06/81 15:00 0.771 34 1.99 0.330 0.807 26 1/05/83 8:00 0.763 35 1.95 0.310 0.815 25 1/03/89 1:00 0.762 36 1.41 0.291 0.469 98 6/06/85 22:00 0.759 37 1.37 0.271 1.36 7 1/18/86 16:00 0.718 38 1.33 0.251 1.20 10 11/24/86 3:00 0.686 39 1.30 0.231 0.539 46 1/14/88 12:00 0.672 40 1.27 0.211 0.449 49 11/05/88 19:00 0.649 41 1.29 0.191 2.19 1 1/09/90 6:00 0.602 42 1.21 0.171 1.90 3 11/29/90 5:00 0.568 43 1.18 0.151 0.759 37 1/27/92 17:00 0.563 49 1.15 0.131 0.568 43 3/22/93 22:00 0.543 45 1.12 0.111 0.368 50 11/30/93 22:00 0.539 46 1.10 0_091 0.762 36 2/18/95 20:00 0.512 47 1.08 0.071 1.58 5 2/OS/96 10:00 0.469 48 1.05 0.051 1 .15 12 1/02/97 6:00 0.944 49 1.03 0.031 0.855 20 10/04/97 15:00 0.368 50 1.01 0.011 Computed Peaks 2.42 100.00 0.990 Computed Peaks 2.12 50.00 0.980 Computed Peaks 1.83 25.00 0.960 Computed Peaks 1.97 10.00 0.900 Computed Peaks 1.90 8.00 0.875 Computed Peaks 1.21 5.00 0.800 Computed Peaks 0.859 2.00 0.500 Computed Peaks 0.647 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-304.tsf Mean= 0.191 StdDev= 0.132 Project Location:Sea-Tac Skew= 0.426 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 1.99 19 2/16/99 21:00 2.93 1 89.50 0.989 2.86 2 3/03/50 16:00 2_86 2 32.13 0.969 1.65 13 2/09/51 2:00 2.61 3 19.58 0.949 1.06 92 1/30/52 8:00 2.38 4 14.08 0.929 1.09 99 3/24/53 15:00 2.04 5 10.99 0.909 1.34 25 12/19/53 19:00 1.92 6 9.01 0.889 1.90 22 2/07/55 17:00 1.86 7 7.64 0.869 1.92 21 12/20/55 17:00 1.89 8 6.63 0.849 1.67 12 12/09/56 14:00 1.78 9 5.86 0.829 1.37 24 12/25/57 16:00 1.75 10 5.24 0.809 1.01 45 1/26/59 20:00 1.79 11 4.75 0.789 1.40 23 11/20/59 5:00 1.67 12 4.34 0.769 1.21 33 2/14/61 21:00 1.65 13 3.99 0.749 1.09 91 11/22/61 2:00 1.63 14 3.70 0.729 1.23 31 12/15/62 2:00 1.62 15 3.94 0.709 1.32 26 12/31/63 23:00 1.62 16 3.22 0.690 1.15 37 12/21/64 4:00 1.62 17 3.03 0.670 1.20 34 1/05/66 16:00 1.58 18 2.85 0.650 1.78 9 11/13/66 19:00 1.99 19 2.70 0.630 1.84 8 8/24/68 16:00 1.47 20 2.56 0.610 1.12 39 12/03/68 16:00 1 .42 21 2.44 0.590 1.22 32 1/13/70 22:00 1.40 22 2.32 0.570 1.20 35 12/06/70 8:00 1.90 23 2.22 0.550 2.09 5 2/27/72 7:00 1.37 24 2.13 0.530 1.06 43 1/13/73 2:00 1.39 25 2.09 0.510 1.32 27 11/28/73 9:00 1.32 26 1 . 96 0.490 B-72 SE 144"Street-Jrme 1007 1 .86 7 12/26/79 23:00 1 .32 27 1.89 0.470 1.14 38 12/02/75 20:00 1.30 28 1.82 0.450 1.10 40 8/26/77 2:00 1.27 29 1.75 Q.430 1.62 15 9/22/78 19:00 1.24 30 1 .70 0.410 1 .27 29 9/08/79 15:00 1.23 31 1.64 0.390 1.62 17 12/14/79 21:00 1.22 32 1 .59 0.370 1 .58 18 11/21/80 11:00 1.21 33 1.54 0.350 2.38 4 10/06/81 15:00 1.20 39 1.49 0.330 1.47 20 10/28/82 16:00 1.20 35 1.45 0.310 1 .30 28 1/03/84 1:00 1.17 36 1.41 0.291 0. 978 96 6/06/85 22:00 1.15 37 1.37 0.271 1 .75 10 1/18/86 16:00 1 .14 38 1.33 0.251 1 .74 11 10/26/86 0:00 1.12 39 1.30 0.231 0.782 49 1/14/88 12:00 1.10 90 1.27 0.211 C.897 47 8/21/89 17:00 1.09 91 1.24 0.191 2.93 1 1/09/90 6:00 1.06 92 1.21 0.171 2.61 3 11/24/90 8:00 1.06 43 1.18 0.151 1.24 30 1/27/92 15:00 1.09 99 1.15 0.131 0.756 50 3/22/93 22:00 1.01 45 1.12 0.111 0.806 48 11/30/93 22:00 0.978 46 1.10 0.091 1.17 36 11/30/94 4:00 0.897 47 1.08 0.071 1.92 6 2/08/96 10:00 0.806 98 1.05 0.051 1 .63 14 1/02/97 6:00 0.782 49 1.03 0.031 1 .62 16 10/09/97 15:00 0.756 50 1.01 0.011 Computed Peaks 3.09 100.00 0.990 Computed Peaks 2.77 50.00 0.980 Computed Peaks 2.46 25.00 0.960 Computed Peaks 2.07 10.00 0.900 Computed Peaks 1.99 8.00 0.875 Computed Peaks 1.77 5.00 0.800 Computed Peaks 1.36 2.00 0.500 Computed Peaks 1.09 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-306.tsf Mean= -1.180 StdDev= 0.204 Project Location:Sea-Tac Skew= 0.041 ---Annual Peak Flow Rates--- -----Flow FreqUency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.081 17 2/16/99 21:00 0.177 1 89.50 0.989 0.176 2 3/03/50 16:00 0.176 2 32.13 0.969 0.126 5 2/09/51 15:00 0.153 3 19.58 0.949 0.056 37 1/30/52 8:00 0.136 9 14.08 0.929 0.092 44 3/24/53 15:00 0.126 5 10.99 0.909 0.062 23 12/19/53 19:00 0.122 6 9.01 0.889 0.087 15 2/07/55 19:00 0.118 7 7.64 0.869 0.089 14 12/20/55 17:00 0.115 8 6.63 0.899 0.085 16 12/09/56 19:00 0.109 9 5.86 0.829 0.064 21 1/16/58 16:00 0.100 10 5.29 0.809 0.052 40 1/23/59 23:00 0.100 11 9.75 0.789 0.100 10 11/20/59 21:00 0.100 12 9.34 0.769 0.058 31 2/14/61 21:00 0.092 13 3. 99 0.799 0.037 45 1/02/62 22:00 0.089 19 3.70 0.729 0.059 30 12/15/62 2:00 0.087 15 3.99 0.709 0.062 22 12/31/63 23:00 0.085 16 3.22 0.690 0.047 42 12/21/64 9:00 0.081 17 3.03 0.670 0.058 32 1/05/66 16:00 0.073 18 2.85 0.650 0.100 11 1/19/67 19:00 0.069 19 2.70 0.630 0.060 25 2/03/68 22:00 0.067 20 2.56 0.610 B-73 SE 14�t`"Street-June 1007 � 0.060 27 12/03/68 16:00 0.064 21 2.44 0.590 0.060 28 1/13/70 23:00 0.062 22 2.32 0.570 0.058 33 12/06/70 8:00 0.062 23 2.22 0.550 0.122 6 2/28/72 3:00 0.061 24 2.13 0.530 0.053 38 1/13/73 4:00 0.060 25 2.09 0.510 0.057 39 1/15/79 2:00 0.060 26 1 .96 0.490 0.104 9 12/26/74 23:00 0.060 27 1.89 0.470 0.061 29 12/02/75 20:00 0.060 28 1.82 0.450 C.029 48 8/26/77 2:00 0.059 29 1.75 0.930 0.057 35 12/10/77 17:00 0.059 30 1.70 0.910 0.031 47 11/19/78 3:00 0.058 31 1.64 0.390 0.073 18 12/14/79 21:00 0.058 32 1.59 0.370 0.056 36 12/26/80 0:00 0.058 33 1.54 0.350 0.118 7 10/06/81 15:00 0.057 34 1.49 0.330 0.069 19 1/05/83 8:00 0.057 35 1.45 0.310 0.060 26 1/03/89 1:00 0.056 36 1.41 0.291 0.031 96 2/11/85 3:00 0.056 37 1.37 0.271 0.115 8 1/18/86 16:00 0.053 38 1.33 0.251 0.100 12 11/24/86 9:00 0.052 39 1.30 0.231 0.043 93 1/14/88 12:00 0.052 90 1 .27 0.211 0.027 99 12/30/88 5:00 0.048 91 1.24 0.191 0.177 1 1/09/90 6:00 0.047 92 1.21 0.171 0.153 3 11/29/90 8:00 0.043 43 1.18 0.151 0.059 29 1/27/92 17:00 0.042 94 1.15 0.131 0.048 41 3/22/93 23:00 0.037 45 1.12 0.111 0.023 50 2/17/94 18:00 0.031 46 1.10 0.091 0.067 20 2/19/95 18:00 0.031 47 1.08 0.071 0.136 4 2/08/96 10:00 0.029 48 1.05 0.051 0.092 13 1/02/97 6:00 0.027 49 1.03 0.031 0.052 39 10/04/97 15:00 0.023 50 1.01 0.011 Computed Peaks 0.200 100.00 0.990 Computed Peaks 0.176 50.d0 0.980 Computed Peaks 0.152 25.00 0.960 Computed Peaks 0.121 10.00 0.900 Computed Peaks 0.115 8.00 0.875 Computed Peaks 0.098 5.00 0.800 Computed Peaks 0.066 2.00 0.500 Computed Peaks 0.096 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-310.tsf Mean= -0.698 StdDev= 0.233 Project Location:Sea-Tac Skew= -0.139 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.276 16 2/16/49 22:00 0.627 1 89.50 0.989 0.539 5 3/03/50 16:00 0.592 2 32.13 0.969 0.592 2 2/09/51 18:00 0.561 3 19.58 0.949 0.186 32 1/30/52 9:00 0.549 9 14.08 0.929 0.143 42 1/18/53 19:00 0.539 5 10.99 0.909 0.208 28 1/06/54 5:00 0.956 6 9.01 0.889 0.368 9 2/07/55 21:00 0.440 7 7.64 0.869 0.313 13 12/20/55 17:00 0.396 8 6.63 0.849 0.244 21 12/09/56 15:00 0.368 9 5.86 0.829 0.259 20 1/16/58 20:00 0.368 10 5.29 0.809 0.212 24 1/24/59 2:00 0.364 11 4.75 0.789 0.396 8 11/20/59 21:00 0.317 12 9.34 0.769 0.215 23 2/24/61 15:00 0.313 13 3.99 0.749 0.129 49 1/03/62 2:00 0.306 14 3.70 0.729 8-74 SE 144'"Street-June 2007 � 0.171 36 11/25/62 15:00 0.285 15 3.49 0.709 0.212 25 1/O1/64 18:00 0.276 16 3.22 0.690 0.150 40 11/30/64 12:00 0.273 17 3.03 0.670 0.163 38 1/06/66 3:00 0.273 18 2.85 0.650 0.369 11 1/19/67 14:00 0.265 19 2.70 0.630 0.216 22 2/03/68 23:00 0.259 20 2.56 0.610 0.211 27 12/03/68 17:00 0.249 21 2.44 0.590 0.179 39 1/13/70 23:00 0.216 22 2.32 0.570 0.195 91 12/06/70 8:00 0.215 23 2.22 0.550 0.490 7 2/28/72 3:00 0.212 24 2.13 0.530 0.195 30 1/13/73 5:00 0.212 25 2.09 0.510 0.212 26 1/15/74 2:00 0.212 26 1.96 0.490 0.317 12 12/26/74 23:00 0.211 27 1.89 0.470 0.196 29 12/03/75 17:00 0.208 28 1.82 0.450 0.022 50 3/24/77 20:00 0.196 29 1.75 0.930 0.169 37 12/10/77 17:00 0.195 30 1.70 0.410 0.102 46 2/12/79 8:00 0.190 31 1.69 0.390 0.273 18 12/15/79 8:00 0.186 32 1.59 0.370 0.151 39 12/26/80 4:00 0.183 33 1.59 0.350 0.273 17 10/06/81 15:00 0.179 39 1.49 0.330 0.265 19 1/05/83 8:00 0.177 35 1.45 0.310 0.177 35 1/24/84 11:00 0.171 36 1.91 0.291 0.085 98 2/11/85 6:00 0.169 37 1.37 0.271 0.956 6 1/18/86 21:00 0.163 38 1.33 0.251 0.368 10 11/24/86 4:00 0.151 39 1.30 0.231 0.139 43 1/14/88 12:00 0.150 40 1.27 0.211 0.088 97 9/05/89 16:00 0.145 41 1.24 0.191 0.627 1 1/09/90 9:00 0.193 42 1.21 0.171 0.549 9 4/05/91 2:00 0.139 43 1.18 0.151 0.183 33 1/27/92 17:00 0.129 44 1.15 0.131 0.190 31 3/23/93 0:00 0.107 45 1.12 0.111 0.053 49 3/03/99 4:00 0.102 46 1_10 0.091 0.285 15 2/19/95 20:00 0.088 47 1.08 0.071 0.561 3 2/09/96 1:00 0.085 48 1.05 0.051 0.306 14 1/02/97 9:00 0.053 49 1.03 0.031 � 0.107 45 1/07/98 10:00 0.022 50 1.01 0.011 Computed Peaks 0.743 100.00 0.990 Computed Peaks 0.651 50.00 0.980 Computed Peaks 0.561 25.00 0.960 Computed Peaks 0.444 10.00 0.900 Computed Peaks 0.420 8.00 0.875 Computed Peaks 0.355 5.00 0.800 Computed Peaks 0.228 2.00 0.500 Computed Peaks 0.151 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-320.tsf Mean= -0.597 StdDev= 0.226 Project Location:Sea-Tac Skew= -0.191 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.312 16 2/16/99 22:00 0.692 1 89.50 0.989 0.636 2 3/03/50 16:00 0.636 2 32.13 0.969 0.621 3 2/09/51 18:00 0.621 3 19.58 0.999 0.207 33 1/30/52 8:00 0.595 9 14.08 0.929 0.161 42 1/18/53 19:00 0.586 S 10.99 0.909 0.223 29 1/22/54 20:00 0.495 6 9.01 0.889 0.392 11 2/07/55 21:00 0.485 7 7.64 0.869 0.354 14 12/20/55 17:00 0.439 8 6.63 0.849 B-75 SE 144"'Smeet-June 2007 0.284 20 12/09/�6 14:OC C.411 9 5.86 0.829 0.275 21 1/16/58 20:OC 0.908 10 5.29 0.809 0.227 28 1/24/59 2:00 0.392 11 4.75 0.789 0.939 8 11/20/59 21:00 0.375 12 4.39 0.769 0.227 26 2/24/61 15:00 0.356 13 3.99 0.799 0.142 44 1/02/62 22:00 0.354 14 3.70 0.729 0.192 36 11/25/62 14:00 0.339 15 3.49 0.709 0.234 25 1/O1/64 14:00 0.312 16 3.22 0.690 0.167 41 11/30/64 22:00 0.301 17 3.03 0.670 0.191 37 1/05/66 16:00 0.295 18 2.85 0.650 0.908 10 1/19/67 14:00 0.293 19 2.70 0.630 0.239 22 2/03/68 22:00 0.284 20 2.56 0.610 0.237 23 12/03/68 17:00 0.275 21 2.44 0.590 0.212 32 1/13/70 23:00 0.239 22 2.32 0.570 0.183 39 12/06/70 8:00 0.237 23 2.22 0.550 0.995 6 2/28/72 3:00 0.235 24 2.13 0.530 0.215 30 1/13/73 5:00 0.239 25 2.09 0.510 0.235 24 1/15/79 2:00 0.227 26 1.96 0.490 0.375 12 12/26/74 23:00 0.227 27 1.89 0.470 0.227 27 12/02/75 20:00 0.227 28 1.82 0.450 0.047 50 3/24/77 19:00 0.223 29 1.75 0.430 0.201 35 12/10/77 17:00 0.215 30 1.70 0.410 0.114 46 2/12/79 7:00 0.215 31 1.64 0.390 0.295 18 12/15/79 8:00 0.212 32 1.59 0.370 0.180 40 12/26/80 0:00 0.207 33 1.54 0.350 0.356 13 10/06/81 15:00 0.207 34 1.49 0.330 0.293 19 1/05/83 8:00 0.201 35 1.95 0.310 0.190 38 1/29/84 11:00 0.192 36 1.91 0.291 0.095 98 2/11/85 5:00 0.191 37 1.37 0.271 0.485 7 1/18/86 20:00 0.190 38 1.33 0.251 0.911 9 11/24/86 4:00 0.183 39 1.30 0.231 0.161 43 1/14/88 12:00 0.180 90 1.27 0.211 0.098 97 4/OS/89 16:00 0.167 41 1.24 0.191 0.692 1 1/09/90 9:00 0.161 42 1.21 0.171 0.586 5 4/05/91 2:00 0.161 43 1.18 0.151 0.215 31 1/27/92 17:00 0.142 44 1.15 0.131 I 0.207 34 3/22/93 23:00 0.132 95 1.12 0.111 0.063 49 2/17/94 18:00 0.114 96 1.10 0.091 0.301 17 2/19/95 18:00 0.098 97 1.08 0.071 0.595 4 2/09/96 1:00 0.095 98 1.05 0.051 0.339 15 1/02/97 9:00 0.063 49 1.03 0.031 0.132 95 10/30/97 7:00 0.097 50 1.01 0.011 Computed Peaks 0.806 100.00 0.990 Computed Peaks 0.709 50.00 0.980 Computed Peaks 0.619 25.00 0.960 Computed Peaks 0.989 10.00 0.900 Computed Peaks 0.963 8.00 0.875 Computed Peaks 0.394 5.00 0.800 Computed Peaks 0.256 2.00 0.500 Computed Peaks 0.171 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:c-330.tsf Mean= -0.930 StdDev= 0.187 Project Location:Sea-Tac Skew= 0.198 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- rlow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.139 17 2/16/49 21:00 0.307 1 89.50 0.989 0.307 2 3/03/50 16:00 0.307 2 32.13 0.969 B-76 SE I44`'`Stree!-June 2007 � 0.193 7 2/09/51 14:00 0.265 3 19.58 0.949 0.097 38 1/30/52 8:00 0.222 4 14.08 0.929 0.078 43 3/24/53 15:00 0.218 5 10.99 0.909 0.112 20 12/19/53 19:00 0.208 6 9.01 0.889 0.144 16 2/07/55 17:00 0.193 7 7.64 0.869 0.199 15 12/20/55 17:00 0.190 8 6.63 0.849 0.152 19 12/09/56 19:00 0.182 9 5.86 0.829 0.107 26 1/16/58 16:00 0.167 10 5.24 0.809 0.087 91 1/23/59 23:00 0.166 11 9.75 0.789 0.162 12 11/20/59 21:00 0.162 12 9.34 0.769 0.103 39 2/14/61 21:00 0.158 13 3.99 0.749 0.068 95 11/22/61 2:00 0.152 14 3.70 0.729 0.107 27 12/15/62 2:00 0.199 15 3.44 0.709 0.111 23 12/31/63 23:00 0.194 16 3.22 0.690 0.087 90 12/21/64 4:00 0.139 17 3.03 0.670 0.103 35 1/05/66 16:00 0.137 18 2.85 Q.650 0.166 11 1/19/67 14:00 0.116 19 2.70 0.630 0.116 19 8/24/68 16:00 0.112 20 2.56 0.610 0.103 36 12/03/68 16:00 0.112 21 2.94 0.590 0.104 33 1/13/70 23:00 0.112 22 2.32 0.570 0.105 32 12/06/70 8:00 0.111 23 2.22 0.550 0.208 6 2/27/72 7:00 0.109 29 2.13 0.530 0.092 39 1/13/73 2:00 0.108 25 2.09 0.510 0.106 29 11/28/73 9:00 0.107 26 1.96 0.490 0.182 9 12/26/74 23:00 0.107 27 1.89 0.470 0.106 30 12/02/75 20:00 0.106 28 1.82 0.450 0.061 47 8/26/77 2:00 0.106 29 1.75 0.430 0.106 28 9/22/78 19:00 0.106 30 1.70 0.410 0.065 46 9/08/79 15:00 0.106 31 1.64 0.390 0.137 18 12/14/79 21:00 0.105 32 1.59 0.370 0.108 25 11/21/80 11:00 0.104 33 1.54 0.350 0.218 5 10/06/81 15:00 0.103 34 1.49 0.330 0.112 21 1/05/83 8:00 0.103 35 1 .45 0.310 0.109 24 1/03/84 1:00 0.103 36 1 .91 0.291 0.058 48 2/11/85 3:00 0.102 37 1.37 0.271 0.190 8 1/18/86 16:00 0.097 38 1.33 0.251 0.167 10 11/24/86 3:00 0.092 39 1.30 0.231 0.073 49 1/14/88 12:00 0.087 90 1.27 0.211 0.056 99 11/05/88 14:00 0.087 41 1.29 0.191 0.307 1 1/09/90 6:00 0.078 42 1.21 0.171 0.265 3 11/24/90 8:00 0.078 43 1.18 0.151 0.102 37 1/27/92 17:00 0.073 44 1.15 0.131 0.078 42 3/22/93 22:00 0.068 45 1.12 0.111 0.093 50 11/30/93 22:00 0.065 46 1.10 0.091 0.106 31 2/19/95 17:00 0.061 47 1.08 0.071 0.222 4 2/08/96 10:00 0.058 98 1.05 0.051 0.158 13 1/02/97 6:00 0.056 99 1.03 0.031 0.112 22 10/09/97 15:00 0.043 50 1.01 0.011 Computed Peaks 0.391 100.00 0.990 Computed Peaks 0.298 50.00 0.980 Computed Peaks 0.257 25.00 0.960 Computed Peaks 0.206 10.00 0.900 Computed Peaks 0.196 8.00 0.875 Computed Peaks 0.168 5.00 0.800 Computed Peaks 0.116 2.00 0.500 Computed Peaks 0.084 1.30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:cb4a.tsf Mean= 0.641 StdDev= 0.148 Project Location:Sea-Tac Skew= 0.477 B-77 SE!44`"Stree�-June 7007 ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 4.78 21 2/16/49 21:00 10.01 1 89.50 0.989 9.85 2 3/03/50 16:00 9.85 2 32.13 0.969 5.62 9 2/09/51 2:00 8.83 3 19.58 0.949 3.39 39 1/30/52 8:00 8.09 9 14.08 0.929 3.11 99 3/24/53 15:00 6.85 5 10.99 0.909 9 .19 29 12/19/53 19:00 6.76 6 9.01 0.889 4.71 22 2/07/55 17:00 6.21 7 7.69 0.869 9.82 20 12/20/55 17:00 6.01 8 6.63 0.849 5.41 12 12/09/56 14:00 5.62 9 5.86 0.829 9.19 25 12/25/57 16:00 5.52 10 5.24 0.809 3.16 43 1/26/59 20:00 5.49 11 4.75 0.789 4.92 18 11/20/59 21:00 5.41 12 9.34 0.769 3.78 39 2/19/61 21:00 5.37 13 3. 99 0.749 3.20 42 11/22/61 2:00 5.35 14 3.70 0.729 3.90 29 I2/15/62 2:00 5.16 15 3.94 0.709 4.13 26 12/31/63 23:00 4.98 16 3.22 0.690 3.49 37 12/21/64 4:00 4.92 17 3.03 0.670 3.79 33 1/05/66 I6:00 4.92 18 2.85 0.650 5.49 11 11/13/66 19:00 4.89 19 2.70 0.630 5.35 14 8/24/68 16:00 4.82 20 2.56 0.610 3.62 36 12/03/68 16:00 4.78 21 2.44 0.590 3.85 32 1/13/70 22:00 9.71 22 2.32 0.570 3.87 30 12/06/70 8:00 4.23 23 2.22 0.550 6.85 5 2/27/72 7:00 4.19 24 2.13 0.530 3.34 91 1/13/73 2:00 4.19 25 2.04 0.510 9.11 27 11/28/73 9:00 9.13 26 1.96 0.490 6.21 7 12/26/79 23:00 9.11 27 1.89 0.470 3.70 35 12/02/75 20:00 4.07 28 1.82 0.450 3.05 95 8/26/77 2:00 3.90 29 1.75 0.930 4.92 17 9/22/78 19:00 3.87 30 1.70 0.910 3.38 90 9/08/79 15:00 3.86 31 1.69 0.390 5.16 15 12/14/79 21:00 3.85 32 1.59 0.370 4.84 19 11/21/80 11:00 3.79 33 1.54 0.350 8.09 4 10/06/81 15:00 3.78 34 1.49 0.330 4.23 23 10/28/82 16:00 3.70 35 1.45 0.310 4.07 28 1/03/84 1:00 3.62 36 1.91 0.291 2.75 46 6/06/85 22:00 3.49 37 1.37 0.271 6.01 8 1/18/86 16:00 3.48 38 1.33 0.251 5.52 10 11/29/86 3:00 3.39 39 1.30 0.231 2.57 48 1/19/88 12:00 3.38 40 1.27 0.211 2.63 97 11/OS/88 19:00 3.39 41 1.29 0.191 10.01 1 1/09/90 6:00 3.20 42 1.21 0.171 ! 8.83 3 11/24/90 8:00 3.16 43 1.18 0.151 I 3.86 31 1/27/92 15:00 3.11 49 1.15 0.131 2.55 49 3/22/93 22:00 3.05 45 1.12 0.111 2.19 50 11/30/93 22:00 2.75 46 1.10 0.091 3.48 38 11/30/94 4:00 2.63 47 1.08 0.071 6.76 6 2/08/96 10:00 2.57 98 1.05 0.051 5.37 13 1/02/97 6:00 2.55 99 1.03 0.031 4.98 16 10/04/97 15:00 2.19 50 1.01 0.011 Computed Peaks 10.86 100.00 0.990 Computed Peaks 9.57 50.00 0.980 Computed Peaks 8.36 25.00 0.960 Computed Peaks 6.86 10.00 0.900 Computed Peaks 6.57 8.00 0.875 Computed Peaks 5.76 5.00 0.800 B-78 SE 144`"Street-June 1007 Computed Peaks 4.25 2 .00 0.50C Computed Peaks 3.35 1 .30 0.231 Flow Frequency Analysis LogPearson III Coefficients Time Series File:cbl8a.tsf Mean= 1.006 StdDev= 0.144 Project Location:Sea-Tac Skew= 0.500 ---Annual Peak Flow Rates--- -----Flow Frequency Analys=s------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 11.14 18 2/16/49 21:00 22.43 1 89.50 0.9�9 21.83 2 3/03/50 16:00 21.83 2 32.13 0.969 14.72 7 2/09/51 15:00 19.81 3 19.58 0.999 8.02 38 1/30/52 8:00 18.28 4 14.08 0.929 7.15 45 3/24/53 15:00 16.05 5 10.99 0.909 9.63 23 12/19/53 19:00 15.54 6 9.01 0.889 11.00 19 2/07/55 17:00 14.72 7 7.64 0.869 11.33 17 12/20/55 17:00 14.05 8 6.63 0.849 12.33 14 12/09/56 19:00 13.90 9 5.86 0.829 9.52 25 12/25/57 16:00 13.36 10 5.24 0.809 7.42 42 1/26/59 20:00 12.80 11 9.75 0.789 12.72 12 11/20/59 21:00 12.72 12 9.34 0.7E9 8.76 34 2/14/61 21:00 12.37 13 3. 99 0.749 7.24 43 11/22/61 2:00 12.33 14 3.�0 0.729 8.93 30 12/15/62 2:00 11.96 15 3.49 0.709 9.51 26 12/31/63 23:00 11.67 16 3.22 0.690 8.01 39 12/21/64 4:00 11.33 17 3.03 0.6?0 8.86 32 1/05/66 16:00 11.14 18 2.85 0.650 12.37 13 1/19/67 14:00 11.00 19 2.70 0.63G ' 11.96 15 8/24/68 16:00 10.83 20 2.56 0.610 8.55 36 12/03/68 16:00 10.75 21 2.94 0.590 8.89 31 1/13/70 22:0a 10.65 22 2.32 0.5?C 9.00 29 12/06/70 8:00 9.63 23 2.22 0.55C 15.54 6 2/27/72 7:00 9.57 24 2.13 0.530 7.85 91 1/13173 2:00 9.52 25 2.04 0.510 9.13 28 11/28/73 9:00 9.51 26 1. 96 0.4a0 14.05 8 12/26/74 23:00 9.24 27 1.89 0.4?0 8.70 35 12/02/75 20:00 9.13 28 1 .82 0.450 7.23 44 8/26/77 2:00 9.00 29 1.75 0.93�� 10.83 20 9/22/78 19:00 8.93 30 1.70 0.910 7.86 40 9/08/79 15:00 8.89 31 1.64 0.390 11.67 16 12/19/79 21:00 8.86 32 1.59 0.370 10.65 22 11/21/80 11:00 8.89 33 1.59 0.350 18.28 4 10/06/81 15:00 8.76 34 1.49 0.330 9.57 24 10/28/82 16:00 8.70 35 1.45 0.310 9.24 27 1/03/89 1:00 8.55 36 1.41 0.291 6.55 46 6/06/85 22:00 8.31 37 1.37 0.271 13.90 9 1/18/86 16:00 8.02 38 1.33 0.251 13.36 10 11/24/86 9:00 8.01 39 1 .30 0.231 6.18 48 1/19/88 12:00 7.86 40 1.27 0.211 6.12 49 11/05/88 14:00 7.85 91 1.24 0.191 22.93 1 1/09/90 6:00 7.92 42 1.21 0.171 19.81 3 11/29/90 8:00 7.29 43 1.18 0.151 8.89 33 1/27/92 15:00 7.23 44 1.15 0.131 6.20 97 3/22/93 22:OQ 7.15 45 1.12 0.111 5.26 50 11/30/93 22:00 6.55 46 1.10 0.091 8.31 37 12/27/99 1:00 6.20 97 1 .08 0.0�1 16.05 5 2/OS/96 10:00 6.18 48 1.05 0.051 12.80 11 1/02/97 6:00 6.12 99 1.03 0.031 10.75 21 10/04/97 15:00 5.26 5C l .Cl 0.011 � B-%9 SE 144'�'Sheet-June 2007 � Computed Peaks 29 .66 100.00 0.990 Computed Peaks 21.78 50.00 0.980 Computed Peaks 19.08 25.00 0.960 Computed Peaks 15.70 10.00 0.900 Computed Peaks 15.05 8.00 0.875 Computed Peaks 13.29 5.00 0.800 Computed Peaks 9.86 2.00 0.500 Computed Peaks ?.83 1 .30 0.231 8-80 SE 144`''Stree�—J:me 7007 Appendix C. XP-SWMM Model Results SF l4�t"Smeer--Jmre 200? Table C.1.XP-Storm Conveyance Reach Descriptions Upstream Upstream Invert Downstream Link Node Downstream Elevation invert Diameter Name Name Node Name Length ft Roughness ft Elevation ft Shape (Height)ft P01 CB1 DS 200.00 0.02 355.41 335.00 Circular 2.00 P02 CB2 CB1 200.00 0.02 359.42 357.41 Circular 2_00 PO4 CB3 CB2 220.00 0.02 361.55 359.52 Circular 2.00 PO6 C84 CB3 210.00 0.02 363.83 361.60 Circular 2.00 P10 C85 CB4 42.00 0.02 363.88 363.98 Circular 2.00 P12 CB6 CB5 44.00 0.02 364.11 364.13 Circular 2.00 P74 CB7 CB6 150.30 0.02 364.93 364.31 Circular 1.50 P16 CB8 CB7 169.30 0.02 365.45 364.99 Circular 1.50 P19 CB9A C69 50.00 0.01 366.73 366.33 Circular 1.00 P18 CB9 CB8 168.30 0.02 365.93 365.50 Circular 1.50 P20 CB10 C89 182.40 0.02 366.45 365.98 Circular 1.50 P21 CB10A C610 39.00 0.02 367.11 366.92 Circular 1.00 P22 CB11 CB10 141.60 0.02 366.95 366.48 Circular 1.50 P70 CB11A C811 34.00 0.02 367.63 367.49 Circular 1.00 MU11A CB11A CB10A 120.00 0.01 370.48 37024 Trapezoid� 0.30 MU11B CB11B CB11A 160.00 0.01 370.50 370.38 Trapezoid� 0.40 MU11B C611B CB11A 160.00 6.01 370.60 370.48 Trapezoid� 0.30 P24 CB12 CB11 169.30 0.02 367.52 367.00 Circular 1.50 P26 CB13 CB12 142.40 0.02 367.85 367.52 Circular 1.50 P50 CB14A CB14 52.00 0.01 369.46 369.25 Circular 1.00 ST14A CB14A CB11B 260.0� 0.01 371.39 370.70 Trapezoid� 0.20 P28 CB14 CB13 115.00 0.02 368.15 367.92 Circular 1.50 P30 CB15 CB14 34.00 0.02 368.42 368.20 Circular 1.50 P60 C615A CB15 52.00 0.01 369.19 368.87 Circular 1.00 OV15A CB15A CB14A 38.00 0.01 371.41 371.39 Trapezoid� 0.20 P54 C614C CB14B 105.00 0.01 370.25 369.89 Circular 1.00 P64 C615C CB15B 105.00 0.01 373.17 371.37 Circular 1.00 P66 C615D CBt5C 60.00 0.01 379.23 373.30 Circular 1.00 P32 C616 C615 197.40 0.02 369.15 368.52 Circular 1.50 P34 C617 C616 300.50 0.02 371.76 370.27 Circular 1.50 P36 CB18 CB17 118.30 0.02 372.98 372.41 Circular 1.50 P37 C618A CB18 37.00 0.02 373.91 374.13 Circular 1.50 D1 CB18A N15A-2 10.00 0.03 375.50 375.40 Trapezoid� 0.50 P38 C619 CB18 198.50 0.02 374.69 373.83 Circular 1.00 P40 CB20 C619 247.50 0.02 375.98 374.74 Circular 1.00 P42 CB21 C820 192.20 0.02 376.95 375.98 Circular 1.00 P08 CB4A CB4 190.00 0.02 366.78 364.73 Circular 1.50 P52 CB146 CB14A 28.00 0.01 369.89 369.49 Circular 1.00 P62 CB156 C815A 142.00 0.01 371.32 369.39 Circular 1.00 P61 CB15A-1 CB15A 20.00 0.01 370.20 369.27 Circular 1.00 P61 CB15A-1 CB15A 20.00 0.01 372.03 371.31 Trapezoid� 0.30 P08A CB4B CB4A 190.Q0 0.02 367.26 366.18 Circular 1.50 POSB C64C CB4B 25.00 0.02 367.63 367.26 Circular 1.50 D2 N15A-2 CB15A-1 590.00 0.03 376.00 370.20 Natural 2.00 __ � Table C.2.XP-Storm Inflows -25-Year Peak Rates Node Name Constant Inflow ft^3/s CB1 - CB2 - CB3 0.045 CB4 0.206 C65 - C66 0.242 CB7 - CB8 0.198 C69A 0.297 C69 - CB10 - CB10A - C611 0.126 CB11A - CB11B - C612 - CB13 - C814A - C814 0.200 CB15 0.588 C615A 0.724 CB14C 0.388 CB15C - C615D - C616 - CB17 - CB18 0.204 CB18A 19.080 CB19 - CB20 - C621 0.157 CB4A - CB14B - CB15B - DS - CB15A-1 - CB4B - CB4C 8.360 N15A-2 - � Table C.3.XP-Storm 25-Year Water Surface Elevations Ground Max Elevation Water Node (Spill Elevalion Freeboard Name Name Crest)ft (ft) (ft) CB1 CBi 362.33 356.168 6.16 CB2 CB2 363.47 361.096 2.37 C83 C63 365.3 363217 2.08 C64 CB4 368.98 365.394 3.59 CB5 CB5 368.38 365.546 3.83 CB6 CB6 368.31 365.711 2.6 CB7 CB7 368.87 366.833 2.04 CBS CBS 369.4 368.097 1.3 C89A CB9A 369J8 369.244 0.54 CB9 CB9 370.08 369.242 0.&4 C810 CB10 370.57 370.303 0.27 CB10A C610A 370.54 370.54 0 CB11 CB11 370.85 370.689 0.16 CB11A CB11A 370.78 370.69 0.09 C611B CB11B 370.9 370.751 0.15 CB12 C612 371.3 371.084 0.22 CB13 CBt3 371.97 371.42 0.55 CB14A C614A 371.59 371.59 0 CB14 C614 372.3 371.691 0.61 CB15 CB15 372.37 371.914 0.46 CB15A CB15A 371.61 371.61 0 CB14C CB14C 373.43 371.615 1.81 CB15C CB15C 376.36 373.17 3.19 CB15D CB15D 382.03 37923 2.8 CB16 C616 374.35 373.612 0.74 CB17 CB17 378.16 376.102 2.06 CB18 CB18 378.63 377.195 1.44 CB18A CB18A 378.66 377.601 1.06 CB19 CB19 379.29 377.209 2.08 CB20 CB20 379.8 377226 2.57 CB21 C621 380.47 377.315 3.16 CB4A C64A 373.58 368.27 5.31 C614B C614B 372.27 371.598 0.67 CB15B CB15B 374.02 371.611 2.41 DS DS 340 337 3 CB15A-f CB15A-1 372.33 372.33 0 CB4B C64B 371.36 370.179 1.18 CB4C CB4C 370.43 370.43 0 N 15A-2 N 15A-2 378 377.519 0.48 - � Table C.4.XP-Storm 25-Year Flow Rates Max Max Velocity Invert Water Max Fbw (ft/s,m!s) Node Elevation Elevation Link Name cfs flls Name ft fl P01 10.86 10.01 CB1 355.41 356.17 P02 10.86 3.99 CB2 359.42 361.10 PO4 10.87 3.91 CB3 361.55 36322 P06 10.90 4.12 CB4 363.83 365.39 P10 4.89 1.78 CB5 363.88 365.55 P12 4.90 1.84 CB6 364.11 365.71 P14 4.63 2.62 CB7 364.93 366.83 P16 4.63 2.60 C88 365.45 368.10 P19 0.30 0.38 C89A 366.73 369.24 P18 4.42 2.49 CB9 365.93 369.24 P20 4.13 2.31 C610 366.45 370.30 P21 1.33 1.67 CB10A 367.11 370.54 P22 2.80 1.57 CB11 366.95 370.69 P70 0.12 0.15 CB11A 367.56 370.69 MU11A 2.66 1.33 CB11A 367.56 370.69 MU11B 1.96 0.82 CB11B 369.40 370.75 MU11B 0.80 0.58 CB118 369.40 370.75 P24 2.57 1.44 CB12 367.52 371.08 P26 2.57 1.44 CB13 367.85 371.42 P50 (1.19) (1.50) CB14A 369.46 371.59 ST14A 2.76 1.57 CB14A 369.46 371.59 P28 2.57 1.44 CB14 368.15 371.69 P30 3.56 2.00 CB15 368.42 371.91 P60 (2.07) (2.60) C615A 369.19 371.61 OV15A 1.40 0.78 C815A 369.19 371.61 P54 0.39 0.49 CB14C 370.25 371.62 P32 5.04 2.82 CB16 369.15 373.61 P34 5.04 2.82 CB17 371.76 376.10 P36 5.04 2.82 CB18 372.93 377.20 P37 5.13 2.88 C618A 373.91 377.60 Dt 14.66 3.09 C818A 373.91 377.60 P38 (0.37) 0.20 CB19 374.69 377.21 P40 (0.32) 0.26 CB20 374.72 377.23 P42 0.16 0.87 C621 375.98 377.32 P08 5.73 3.35 CB4A 366.18 368.27 P52 0.39 0.49 CB146 369.89 371.60 P61 3.78 4.78 CB15A-1 370.20 372.33 P61 2.55 5.62 CB15A-1 37020 372.33 P08A 5.73 3.22 CB4B 367.26 370.18 P08B 5.73 3.23 CB4C 367.63 370.43 D2 14.66 8.62 N15A-2 375.00 377.52 J Figure C.1. Hydraulic Profile—CB-1 to CB-4C—25-Year Peak :5•rw•CB•1 n W1� 7iY�Tm�00IIlm 54p k0 I]S6 ;�!: 7i:p .0 !'.'! '�t0 9E�• WiJ �111.3 Z_���� nCt ...�.__.._..... . . ....._.. _.. .._... _.. -� ___._._--�---!" ---------_�� __- __-�— �__-- ---- ,r_ _�_�...,.���.�—._ ____— — ______— —w�.—.r:...�.�-�---.� — . --- --- - ----�.-- -------- -------:.�.-- ------ -----.�...----�� �— ---- ------ ------ ��� �,�.�.=:_�W-----��_-----__ _ __ _. _ __ _ � � r � ; �:�� �/: _ _ _ _ _ _ . __ _ _ _ _ _ %��i`i � �� �� �� � �� � , , ; �:� , �% �.r �a� � ., u, .� � .� �,� � :., .� � �. �..�: cn ^:•c�• e.n c r{� �o a:i�.�Q ,ee a �a.w ��e Q �n :a -�.saa :u: :s. D :DD :;:AO D � _X C:I.!0 C�.I.W m�.00 . :co.ao ..... .... .. �wao •u:c -_a:• Figure C.2.Hydraulic Profile—CB-4 to CB-15—25-Year Peak L•-Yur-�1 m CF•.! Dry(Of T�w OSl1LD SYp M1 I Y :±I� �01 E s�la 6/G 7 115.2 G!1.0 roi!i 7 �r.�� i .^:0 .�� .-.�"�� . .... .....�� . �-r' . I'��_( ...,-" ^iC .. .. .'. . .. ._... �..._...- . . .. aac .... . � . ._.___'._. ..._..... _... ... j ...._._ __---. . .. _ . . .. . . ... _ ' � �, ' I'� ----- '- ---- / -"�~ xac r . . .. � . -_' _._ ., ------- ��� � - t � � � -------- ------ �..-- _-- ---' �eaa �. _ -- -'-' _ -'----- � , �� . .. .......'. -'-- '------- --_ ` !`_F�_u. rc -�- -- - ----_- _'�-�" ___. -•-� -- �- __^---' Y<C _" "� -- . . . . ._ _.. .. .. . . . .. Y�C --_-_--- . X�C — rJC ... ... .... ..... . ..._... ._.__.. . . ..... .. .. .._.___'_____- .. . ........._«�.^.�."_""__'__.. ...._.. . CW P/C CBO ►�:G! �M CA •10 CN �I� p4 P}D C�1G P� C611 P:� pl: ►.0 9+7 P7g C8uP70W1C '%:{ •.00 � I.Oi ��. C' �/D O p 7.C) o �. ].]0 0:�.1 ]1� Q !"' 7�� C:'p7 ).06 J::dT lY. 0�- 7}I IYr D:' C : D.i� ]�F D�.1.l0 � t� C i.67 �:1.70 J:1.l0 � �'.0 C�.IL'0 .-r.e:+.-«�a•. ic:;: ia;r •ea:o �:e .. �.iao�--ze�c = ,ra r��r.��,.r.. Figure C.3.Hydraulic Profile—CB-15 to CB-18A—25-Year Peak 'tiYv�C}IS L C&�4 Oa�'(G�Tnr 009J909Yp k0 C:5 �Iq! 10.'L X1.3 i:c< I17S �C 7R.G �.CC _"_--'�_�_�__ "_._._—._ _. _�_�.—.'_—�.__'-- . ... ... . . �1U C '.X�. r7." C�1e Pi1 G17 Pk 'S�/ %7 �IU i+: C a �.w ::a.a .� �:aa �m c.�a+ �.a 0.i.7o = I.:C 0.�.eo 0 x io�. aca: iiaro -- nx—. i Figure C.4. Hydraulic Profile—CB-10 to CB-18A—25-Year Peak z�v..�.caiaw�s•e. JW,4,'*wCRC1:C07wp� �»s re.i x�. e:n -ma ars �owv ny.: � _ -_.------- - �� __ -- ._.,._..,_...r-_.....__..... —„ - .—.._._.. -..-_.� �.... . _.T='"="__ _ _ - `" ------- . �. _._.___:. ._— _ �- „�� � - - - �—_ - � I "`-' . ._ _ .. . . _ .. . � - . .... �...--�- �c! :ea �+ u,irra��� .e�� a�n ai�.ti, ce�u�,eu�so�en, sas a �.n �� c�,s c: .a ��e o..n :s ,..mu�u o:i�e h:� � i�: t/�5: yp�a 'i0."" .'.C:C-+fi2G"+�-+� :iCY �. Appendix D. HEC-RAS Analysis of Roadway Conveyance , Description of inputs: Geometrv: j Geometry of roadway based on Barghausen Consulting Engineers field survey from 6/07. �', STA Descri tion 0+00 10' west of CB-11A ' 1+60 10'west of CB-11 B 6+60 160' east of CB-15A-1 8+10 290'west of CB-18A 1010 85'west of CB-18A Flow: Based on cumulative 100-year peak flow rate to the conveyance system predicted by KCRTS 1- hour time series minus the estimated capacity of the 18-inch pipe on the south side of SE 144'h Street(5.0 cfs}. SE 144`"Streer—J:me�GO' SE 144th Roadway Conveyance Plan: SE144th Roadway 6/17/2007 Geom:SE144th Flow:Roadway Q �0 - - 144th 1 - � -- Legend WS Exis �— � Ground i ROB 378 I /376 � � /c ' 0 a m > � W 374 I � 372 ' o 0 0 � � + o �o ao � � � W N � � � 370 �- --T-r�� •-� 0 200 400 600 600 1000 1200 Main Channel Distance(ft) SE 144th Roadway Conveyance PIan:SE1441h Roadway 8/17l2007 Gsom:SE114Mi Fbw:Roetlway O River�1r4M Readi�7 RS=7070 Sta 70.10 .024 � .01 - � .035--� 383 ���w � 382 W8 Fxia '� �� G�wrM • ` j Benk Sta � � I 379 378 I 377 378 � ...-.—. ._-,—� �� �-�- ��T- � � -r� , -�- � --.—� .—T � -__-�-• � --� , �� -30 40 •10 0 10 20 30 Statlm(II) SE 144th Roedwey Co�veyance Plan:SE144th Roadway 6/17/2007 c.om:sEta�m Flow:Roaaw.r� River=111M Rsach�1 R3=870 Ste 8+10 �—.oY2 � At � .035 � 378.0� �p�W 377.5� W$Erfs 377.0 C'�� c' BYnk 8ta � 378.5 � 378.0 l 375.5� 375 0� 374.5�- �-T- � -- - T . - . , - _ , —�. ._.. _ _ , . -30 -20 -10 D 70 20 30 10 60 SleUon(fl) SE 144th Roadway Conveyance PIan:SE144th Roadway 6117/2007 Georn:9E14Mh Fbw:RoaWny� River•744th Raarh=7 RS=880 $18 8�80 � --.022 —� . _ . - A7—_ ._. � .�r .1 375.5' �b 375.0 WS Fxis 37�.5 Giound c 37�.0 BeNc Sla E 373.5 u'1 373.0 372.5 372A 371.5� .. . .-� _ , __r-. , i —__ � __r._—__. , � , _. • .___ ___ � �-. -30 -711 -70 0 10 20 90 10 60 saom�n� SE 144th Roetlwey Conveyance Plan:SE144th Roadway 8/17/2007 Gaorn:SE1Mih Fbw:Roetlway a River�1Nth Raach=1 RS�780 Sla 1.80 �—.071 .Ot � .0� _I 371.5� �� 374.01 yyg�yo 373.Si (ardud 1 � �, 373.0 ���° � 372.5 374.0 371.5 377.0 370.5 ��� �--�� -�-� .__T. , �— . __�—. , . _ ' -30 -20 -70 0 10 . 2f1 , 30 ...�0 60 3htlon(R) SE 144th Roedway Conveyence Plan:SE144th Roedway 8/17/2007 Geom:SE14fN Fbw:Roedway O Wver=7111h Resch=1 RS=0 8to 0+00 .02Z --.Ot . � .022---� 372.5 �� I 372.0 W8 Exla ' 371.5 a�� 8onk&a � 371.0 370.5 370. 389.5 389A+- .T- -�T- � -----T� � -� - ---�� �--��_. , -- - ---�T � , - , -00 �0 -20 0 20�� �0 80 Slatlon(fl) HEC-RAS Plan:SE144th River: 144th Reach: 1 Profile: Exis , _ _ - - - --- ' Reach River Sta Profile Q Total Min Ch EI i W.S.Elev Cnt W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width I Froude#Chl (cfs) (h) (ft) (ft) (h) (�) (�s) (S4 h) (ft) _ -- -I --- - -- _ , _ 7.44� 20.08 1.35 1 1010 Enis 20.09 378.0�- 378.44 378.22 378.56 0.005394� 4.23 6.22 0.00 1 660 Exis 20.09 373.69� 373.70 373.33 373.84 0.0068607 0,39 _ -_ - --- - _. _- I 6.62 7.79 0.86 --- - -- ----- 1 160 Exis 22.42 370.90 371.63 371.63 371.77 0.002867 3.25 7.921 28.69 1.12 ,_ _ - � _ _ ---- 1.17 1 0 Exis 22.42 370.70 371.16 371.14 371.27 0.003401, 3.00, 9.76 44.461 r _ _ _ _ _ HEC-RAS Plan:SE144th River:144th Reach: 1 Proflle:Exis -- __ _ . --. Reach River Sta Profile E.G.Elev� W.S.Elev Vel Head '� Frctn Loss C&E Loss Q Left Q Channel Q Right Top Width _ -- - _ . -- - _ _ �- _ --- �ft� _ �ft� �ft�__ .i__ �ft� �ft�_ -- (cfs) (cfs) _(cfs) _ (ft) _. .. 1 1010 Exis 378.56� 378.44 0.11 1.97 0.02 0.24 I 4.43 15.42 20.08 ' 1 810 Exis 376.57 376.22 i 0.35 1.74 0.06' 20.09 6.22 ---,. 1 660 Exis 373.84 373.70 0.14 2.07 0.00 � 0.00 20.09 7.79 1 160 Exis 371.77 371.631 0.14 0.50 0.01 0.31 18.59 3.52 28.69 1 0 Exis 371.27 371.16 0.11 0.16 15.32 6.93 44.46 �e .it. -.V. tW -.'1 'ii '-a/ - .'ai . E�Y4�3PIi�pLR��f�. �i i'�A� 1� �Y6 �l iRE�3�� ]�n�'-�S�91 �a1 as����s.-: � aR�-ak at sf`�+e� "a�i:�,:A: 1IA� p-..yDi..a�.:,i�..�q qf:_-.. 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