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HomeMy WebLinkAbout03111 - Technical Information Report - Storm Drainage Calculations � I I STORM DRAINAGE CALCULATIONS '� Ribera Short Plat NW1/4 of NW1/4 of Sec 15, Twn. 23N, Rng. 5E Renton, Washington Prepared for: Seattle Mortgage 6450 Southcenter Boulevard, Suite 106 Seattle, Washington 98188 � April 29, 2005 Our Job No. 11556 ������� ,,� A. T,� .���°F wAsy,��� ,� �e� � � �' � � � �" J; ,r � � 'Q 378'9 � �� ' oT F�rsTER`� �� � 'J�ONAI-FN� �".'�^`' ` -�"�- �� �C�H A C�s CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES � 'T��, z 1 H215 72ND AVENUE SOUTH, KEtvT WA 98032 (425) 251-6222 • (425) 251-8782 FAx � www.barqhausen.com n � o�� ��� y� 2 <r �P hG ENG�N� -� 3 /// • UPSTREAM BASIN LAND COVER CHARACTERISTICS For Ribera Short Plat EAST BASIN F-P 2.55 Acre R-8 J-P 2.1 Acre R-8 4.65 Acre Pasture to 75%Impervious 25%Pervious 3.49 Acre Impervious 1.16 Acre Pervious 100% Pasture Impervious Net Impervious Pervious Total Area= 158.78 32.19 2.72 123.87 91.11 32.76 WEST BASIN A=6,087,404 SF 567,727 SF � 6,655,131 SF Impervious Pasture Pervious Total= 152.78 Acre Pasture=26.82 Acre 26.82 R-10=6.71 Acre+ 1.35 Acre 7.25 0.81 R-14=2.75 Acre 2.47 0.28 All Impervious=21 Acre 21 R-8 =94.15 Acre 70.6 23.55 101.32 26.82 24.64 • 11556.001 PAT/lw � � - - �, Renton Highlari�ds;Profes�onaf Plaz� �� _�� �� ;�- :� z "*:_ s - k 4� Area��ove�age.BieakdDown:r _ '�- r = - .;. � All areas have been measured by hand using an electronic planimeter. Zoneing Location A-P 25,420 CS � B-P 38,440 CS C-P 148,802 R14 D-P 52,700 RM1 E-P 139,501 R14 I, F-P 366,423 R8 G-P 46,500 R4 � H-P 35,340 R8 I-P 246,143 R8 � J-P 91,761 R8 K-P 36,581 R4 L-P 40,300 R4 M-P 383,164 R4 100% Imp 118,421 R4 Church Parking Lot � Net Area by Zoning , � %IMP %PER. ' � CS 65.00°� 35.00% I R14 90.00% 10.00% Assumed RM1 75.00% 25.00% I � R8 75.U0% 25.00°/a R4 55.00% 45.00% Areas in SF N� Total Pasture 100%Imp Net Imp Per �� CS 436,481 63,860 372,621 242,204 130,417 R14 1,450,748 288,303 1,162,445 1,046,201 116,245 � RM1 554,433 52,700 501,733 376,300 125,433 R8 2,817,671 739,fi67 2,078,004 1,558,503 519,501 R4 1,657,313 460,045 118,421 1,078,847 593,366 485,481 ' � Total SF 6,916,646 1,604,575 118421 5,193,650 3,816,573 1,377,077 Total Acre 158.78 36.84 2.72 119.23 8T.62 31.61 � � � � Wi � Sta. 0+00 2 yr water surface Worksheet for irregular Channel � Project Description Project File c:\haestadlfmwlprojectl.fm2 Worksheet tailwater calc 100 yr Flow Element Irregular Channel Method Manning's Formula Solve For Water Elevation Input Data Channel Slope 0.010000 ft/ft Elevation range: 376.27 ft to 384.00 ft. Station (ft) Elevation (ft) Start Station End Station Roughness 0.00 384.00 0.00 32.00 0.055 6.00 380.00 11.00 380.00 16.00 376.27 21.00 380.00 26.00 380.00 32.00 384.00 Discharge 34.66 cfs SResults Wtd. Mannings Coefficient 0.055 ' Water Surface Elevation 37920 ft Flow Area 11.52 ft2 Wetted Perimeter 9.81 ft Top Width 7.86 ft Height 2.93 ft Critical Depth 378.38 ft Critical Slope 0.058180 ft/ft Velocity 3.01 ft/s Velocity Head 0.14 ft Specific Energy 379.34 ft Froude Number 0.44 Flow is subcritical. � 03/19/OS FlowMaster v5.15 02:19:43 PM Haestad Methods,Inc. 37 Brookside Road Waterbury,CT 06708 (203)755-1666 Page 1 of 1 Sta. 0+00 100 yr water surface Worksheet for Irregular Channel � Project Description Project File c:�haestadlfmwlprojectl.fm2 Worksheet tailwater calc 100 yr Flow Element Irregular Channel Method Manning's Formula Solve For Water Elevation Input Data Channel Slope 0.010000 fUft Elevation range: 376.27 ft to 384.00 ft. Station (ft) Elevation (ft) Start Station End Station Roughness 0.00 384.00 0.00 32.00 0.055 6.00 380.00 11.00 380.00 16.00 376.27 21.00 380.00 26.00 380.00 32.00 384.00 Discharge 74.90 cfs . Results Wtd. Mannings Coefficient 0.055 Water Surface Elevation 380.36 ft Flow Area 26.07 ft2 Wetted Perimeter 23.78 ft Top Width 21.08 ft Height 4.09 ft Critical Depth 379.14 ft Critical Slope 0.052500 ftifr Velocity 2.87 ft;'� Velocity Head 0.13 ft Specific Energy 380.49 {' Froude Number 0.46 Flow is subcritical. � 03/19/05 FlowMaster v5.15 , 02:19:14 PM Haestad Methods, Inc. 37 Brookside Road Waterbury,CT 06708 (203)755-1666 Page 1 of 1 �,��-� ��s�� � Appended on: 14:51:04 Friday,March 18, 2005 LPOOLCOMPUTE (east pond] SUMMARY using Puls Start of live storage: 389.0000 ft ' Match Q i Peak Q Peak Stg Vol ; Time to Event j (cfs) j (cfs) (ft) Vol (cf) �acft) � Empty � 2 year ; 0.0000 � 16.5287 ( 390.8713 28598.28 0.6565 ; 56.67 � I 100 I 0.0000 i 32.6343 393.5642 154733.54 3.5522 a 58.67 ! I ( year I , ��i � 2 year Nydrograph Plot , -�--�--� �--�—�--�--�--�--�-- -- -- ---- -- -- -- - -- -- -- ---- - - '� 15 ' �Y�h 1956eas�dey , � , � ��y�ar;out; � � - -- -- --,-- -- -- —-- -- -- ---- -- -- ---- -- - ---- - -- --- - - � �� � ; , . , ; � � --�--- --�------------ -------,-------------------------------- 0 " , Iti M t� O (''7 h- O f`7 f� O M 1� O M Y� O t'") h� O (`7 1� O M f� O (�7 1� O M t� O � 00 (D Ul f'"] �-- O OD [D V7 M � O OD (D 4'l f'�] O OO (D U7 ('") e-- O QO fD U'1 t'l i-- O • e-- N V (D 00 O CV (`7 U7 1� m C7 � (D 00 O N � �A P- � M V} (1] 00 O (V V (D a-- c- c- � �-- .- N N N C'V N ('') f`') M ('7 ('') f'7 � � V' � V' 41'1 lfl V7 ll'i Time in Hours 100 year Hydroyraph Plat AO ����____T ___T_____�_____T_��____1__l__�_____ _l_�r�_�___ _ _ _ Y , . , ;`'f��6eas�7�ev 30 ---- --- - --- - ----- y -1- --;-----�--�-----;--�--;--�-- �-�_i00;ye�ro�t-- - V '1L ____ __ _ '_"___T _l'"T'_f_'__>'_1__f__f_l__7__f______'1__T__f____ '_T'___" LJ � ^)O _'_' '_ '_.__;"'..'_�_', _ _� _ '� ''� '� � '� �' _ __'_ __'__i____ _'�"r__ L o �5 --,--- --;---------r--;- -- - - -------- - -------- -------------;----- �` �� --� ----- ---- -- -- ---- -- -- - - - - -- -- -- ---- -- ----- - -=- -- 5 , , , 0 , 1� O ('') f7 M 1� f�- O O f`7 (�'i t� h I~ O O C'"] M f� tti O O O M M t� f� O O M t�7 fD U7 M (''i (�') � � O O OD N fD fD (D U7 U7 (�7 (� � � O O O a0 OD tD �D vi tn f�'l M O N ct (1] OD O ('V V (D f� � c- M U7 1� � � C7 Vl Iti Ql (�7 � fD OD O CV � (D QO � � � � � � fV N fV (V ('V f`7 ('"1 f'7 Cl S'7 V � � V � �f7 Y7 U� �f"l U7 Time in Hours Running P:\\11000s1111556�\engineering\lstormshed\least pond Report.pgm on Friday, March 18, 2005 Summary Report of all Detention Pond Data � Event Precip (in) • 6 month 'f 1.2800 __ _ _ _ _ • ;2 year _';2.0000 �10 year �2.9500 25 year ;3.4500 j 100 year'3.9_500 BASLIST2 [11556eastdev] Using [T��PE1�) As [2 year] [11556eastdev] Using [TYPE 1 A] As [100 ye<<<� [11556eastdev] Using [TYPEIA] As [2 year] [11556eastdev] Using (TYPEIA] As [100 ye��� � LSTEND � Peak Peak T ' Peak Vol Area i BasinID Event j �cfs� (hrs) { (ac-ct? � (ac) �Method/Loss�Raintyp�• � �11556eastdev i 2 year 17.0312 �� 9.17 18.3223 158.78 ' SBLJH/SCS TYPEIA �, ----- - (11556eastdev 1� � 40.9303 � 9.00 42.3495 158.78 � SBLJH/SCS TYPEIA year � � ll556eastdev 2 year 17.0312 9.17 18.3223 158.78 a SBUH/SCS TYPEIA 11556eastdev�100 40.9303 9 00 42.3495 158.78 � SBLTH/SCS TYPEIA l y �� � , • BASLIST [TYPElA] AS [2 year] DETAILED [11556eastdev] LSTEND Record Id: 11556eastdev ,Design Methad � SBUH Rainfall type TYPEIA � �Hyd Intv 10.00 min Peaking Factor 484.00 I + Abstraction Coeff �0.20 � �Pervious Area 64.95 ac �CIA 93.83 ac iPervious CN � 85.50 DC CN 98.00 ,Pervious TC 181.54 min DC TC 181.54 min , �- � ,� � Pervious CN Calc �; i ��- Description j SubArea Sub cn I� Open spaces, lawns,parks (>75°Io grass) � 32.76 ac 86.00 i j i ,, Meadow or Pasture 32.19 ac 85.00 ;I � Pervious Composited CN (AMC 2) 85.50 ' � � � Pvrvim�c Tf' f'al� �� _- -- -J _ _ ___ __ � � � ! Type � Description Length Slope Coeff �Misc ;T � ;- - � !�Sheet woods or forest with light 300.00 ft 0.50% 0.4000 ?"� E 113.89 f (underbrush.: 0.40 ��� in �rrun Shallow Brushy ground with some 150.00 ft 0.50% 0.0600�i2.19 min trees (n-0.060) Brushy ground with some �1000 00 j --;31.�- 15 Shallow �trees (n-0.060) �ft 1.00°Io 0.0600� ��n Channel 1200.00 �_' ; (interm) IConcrete pipe (n=0.012) ft 0.50°Io 0.0120� 6.66 min I I i Channel Grassed-lined stream 2000.00 0.20%'0.0300 2�•64 � (cont) (n=0.030) ft ��min '�� Pervious TC 181.54 � ;; �! min '., '( Directly Connected CN Calc Description j SubArea i Sub cn Impervious surfaces (pavements, roofs, etc) � 93.83 ac ; 98.00 � DC Composited CN(AMC 2) 98.00 � �! Directly Connected TC Calc �i Type Description Length Sl� ope Coeff ;c TT �;Fixed � 181.54 min � , f--- -- I j; Directly Connected TC 181.54min �, HYDLIST SUMMARY ' [2 year out] [100 year out] ' LSTEND ' ';, HydID Peak Q (cfs);Peak T (hrs)iPeak Vol (ac-ft) ,Cont Area (ac)� ,I 2 year out 16.5287 ; 9.83 , 18.3223 158.7800 � 100 year out j 32.6343 ; 11.83 r 42.3495 158.7800 ' ' STORLIST � [east storage] �, LSTEND i � Record Id: east storage , � �Descrip: ;east storage Increment 0.10 ft � �� ; i ;Start El. ;,389.0000 ft Max El. 401.0000 ft' j • �- -Stage Volume '� � Stage (ft) � Volume (ct) ! 389.00 0.0000 � � 390.00 6142.0000 i 391.00 31914.0000 � 392.00 � 57687.0000 ' ; 393.00 � 119730.0000 � 394.00 i�181774.0000 ; ��395.00 288924.0000 � 396.00 396074.0000 j 397.00 541774.0000 ; ; 398.00 687474.0000 � ; 399.00 861724.0000 i �--400.00 1035974.0000 ; ! 401.00 3 �4129361.0000 � DISCHLIST • [east discharge] LSTEND Record Id: east discharge �Descrip: ;east discharge�Increment;0.10 ft ���'��� Start El. ;389.0000 ft �Max El �401.0000 ft ' ( Stage (ft) Discharge (cfs) � 389.00 � 0.0000 ; 390.00 i 4.2950 ; 391.00 18.3350 � � 392.00 � 24.94�0 � 393.00 30.1390 �- 394.00 34.5620 395.00 � 38.4970 396.00 42.0330 j 397.00 45.3080 � � 398.00 � 483630 � �nr� r-���, _ t „in - _ _ � ; 400.00 53.9550 � 401 AO 56.5450 Licensed to: Barghausen Engineers • � � Appended on: 15:00:36 Friday, March 18, 200� 11556westdev Event Summary -�-------- Event IPeak Q (cfs)�Peak T (hrs) Hyd Vol (acft) �Area (ac) �Method�Raintype`;, �6 month ; 9.9461 �, 9.17 j 10.4198 ; 152J800 SBUH ;TYPEIA � 2 year ; 18.1302 � 9.00 � 18.4999 ; 152.7800 SBLTH ;TYPEIA . � 10 year ; 29.6782 ; 9.00 29.7335 � 152 7800 , SBLTH iTYPEIA � � 25 year ! 35.9360 � 9.00 35.7851 152.7800 ; SB;TYPEIA i �100 reay : 42.2688 9.00 41.8965 i 15 087�0 SBUH 'TYPEIA � Record Id: 11556westdev IDesign Method � SBLTH �Rainfall type TYPEIA iHyd Intv j 10.00 min �Peaking Factor 484.00 ;� IAbstraction Coeff �-0.20 ' ,Pervious Area �51.46 ac IDCIA j 101.32 ac ;Pervious CN 85.48 ;DC CN 98.00 � 'jPervious TC 169.05 min �DC TC j 169.05 min ;; Pervious CN Calc �� Description �SubArea Sub cn � i Open spaces, lawns,parks (>75% grass) � 24.64 ac 86.00 ;, Meadow or Pasture 26.82 ac � 85 00� �-- Pervious Composited CN (AMC 2) � 85.48 � Pervious TC Calc Type Description � Length Slope i C eo ff '; M'isc �T Short prairie grass and � { 2 00 �130.71 Sheet lawns.: 0.15 850.00 ft 0.40% i0.1500�lp �r�un Channel 2900.00 �--I -' 20.78 (interm) Concrete pipe (n=0.012) f� ;0.30°Io 0.0120 i �n � ( � , � ' Channel ,2450 00 � � 17.� 56 Concrete pipe (n=0.012) � 0.30% 0.0120 I � �� i(interm) �ft ! i i min I� �, - - ' �I { Pervious TC ; i69.05 ( ; min �I - Directly Connected CN Calc � � �--- Descrintion j SubArea ' Sub cn � ;� � Impervious surfaces (pavements, roofs, etc) ; 101.32 ac�� 98.00 �; �� � DC Composited CN (AMC 2) � ��9-8.00 'i � ;� , : � � � � � �� � Directly Connected TC Calc ; � T e f Descr� tion Len th Slo e Coeff � Misc TT I , YP ! �P I g I P �, , ;. � ��Fixed �---- 169.05 min � � Directly Connected TC � 169.OSmin i ; � Licensed to: Barghausen Engineers � � � `�� b�w�-'`�, 1 � ��Cv -`� � BACKWATER COMPUTER PROGRAM FOR OPEN CHANNELS Channel Data Filename:11556-2.bwc Tailwater Elevation:379.2 feet Discharge Range:24.66 to 34 .66 Step of 1. [cfs', STATION 0.00: INVER`_^= 376.27 FT EC=1 . 50 Q-Rr=.'TIO=0 . 00 CROSS-SECTION DAT�_: DIST/STAGE IS MEaSURED rROM IPIVERT; N-FAC IS MEASURED BET'u�IEEN ST=.G�S LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOI-Z 5.00 3 .73 0.055 * 5.00 3 .73 0.055 10.00 3.73 0.055 * 10.00 3 .73 0.055 16.00 7.73 0.055 * 16.00 '7.73 0.055 Q(CFS) Yl(FT) WS ELEV. * YC-IN YN-IN Q-TW TW-HT N-Y1 A-Yl N1P-Y1 V-Y1 *****************************,r�***********************************,r***********. 24.66 2 .93 379.20 * 2 .00 2.61 0.00 2 .93 0.055 11.51 9 .80 2 . 1� 25.66 2 .93 379.20 * 2.03 2.65 0.00 2 .93 0.055 11.51 9 .80 2 .2" 26.66 2 .93 379.20 * 2.06 2.69 0.00 2.93 0.055 11.51 9.80 2 .3"� 27 .66 2 .93 379.20 * 2.09 2.72 0.00 2.93 0.055 11.51 9.80 2 .4C 28.66 2 .93 379.20 * 2.12 2.76 0.00 2.93 0.055 11.51 9.80 2 .4� 29.66 2 .93 379.20 * 2.15 2.79 0.00 2 .93 0.055 11.51 9.80 2 .5� 30 .66 2 .93 379.20 * 2.18 2.83 0.00 2 .93 0.055 11.51 9.80 2 .66 31 .66 2 .93 379.20 * 2.21 2.86 0.00 2.93 0.055 11.51 9.80 2 .?r 32 .66 2 .93 379.20 * 2.24 2.90 0.00 2.93 0.055 11.51 9.80 2 .8= � 33 .66 2 . 93 379 .20 * 2.26 2 . 93 0 .00 2 .93 0 . 055 11 . 51 9 .80 2 . 0� 34 .65 2 . 96 �;G . 23 % .29 2 . 50 0 . 00 2 . 9� 0 . 0�5 ] � . 7�i ti . 90 2 . 9� ****REACH N0. l : LENGTH= 240.00 FT AVG.GRADE= 0.95$ *`* " STATION 240.00: INVERT= 378.56 FT EC=1. 50 Q-FyTI0=0 . i},) CROSS-SECTION DATA: DIST/STAGE IS MEySJRED F�ZOM INVERT; N-�AC IS ��tEP.SURED BETWEEN ST:�GES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FAC'I'OR 5.00 1.44 0.055 * 5.00 1.44 0.055 10 .00 1.44 0.055 * 10.00 1.44 0.055 16.00 5.44 0.055 * 16.00 5.44 0.055 Q(CFS) Yl(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Yl NJP-Y1 V-Y1 ********************************,r*****************,r******************«*«******* 24.66 1.88 380.44 * 1.37 0.00 1.37 1.73 0.055 16.29 21.99 1.51 25.66 1.91 380.47 * 1.39 0.00 1.39 1 .75 0.055 16.93 22 .10 1. 52 26.66 1.94 380.50 * 1.41 0.00 1.41 1 .76 0.055 17 .57 22 .21 1 . 5�: 27 .66 1.98 380.54 * 1.43 0.00 1.43 1.78 0.055 18.44 22 .35 1. 5G 28.66 2 .01 380.57 * 1.54 0.00 1.54 1.79 0.055 19.09 22 .46 1. 50 29.66 2 .05 380.61 * 1.55 0.00 1.55 1.81 0.055 19.96 22 .61 1.4� 30.66 2 .10 380.66 * 1.57 0.00 1.57 1.82 0.055 21.05 22_79 1 .46 31.66 2.14 380.70 * 1.58 0.00 1.58 1.84 O.a55 21.93 22.93 1.44 32.66 2 .19 380.75 * 1.59 0.00 1.59 1.85 0 .055 23 .04 23 .11 1.42 � 33 .66 2 .24 380.80 * 1. 60 0. 00 1.60 1 . 86 0 . 055 24 . 15 23 .29 1 .39 34 .56 2 .2? 380 .83 1 . 6� 0 . 00 1 . 61 1 . 88 0 . 055 24 . �� 23 .=0 1 .4Q i ****REACH NO. 2: LENGTH= 125.00 FT AVG.GR.ADE= -2 .05� **** STATION 365.00: INVERT= 376.00 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: � DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES I LEFT(FT) STAGE(FT} N-FACTOR * RIGHT(FT� STAGE(FT) N-FACTOR 5.00 4.00 0.055 * 5.00 4.00 0.055 10.00 4.00 0.055 * 10.00 4.00 0.055 16.00 8.00 0.055 * 16.00 8 .00 0. 055 Q(CFS) Yl (FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Yl WP-Yl V-Yl *******�******************:r«*******,r******************************************* 24.66 4.80 380.80 * 2.06 0.00 2.06 0.00 0.055 36.96 25.69 6.67 25.66 4.82 380.82 * 2.09 0.00 2.09 0.00 0.055 37 .41 25.76 O.b9 26.66 4.84 380.84 * 2. 12 0.00 2.12 0.00 0.055 37.86 25.83 0.70 27.66 4.86 350.86 * 2.15 0.00 2 .15 0.00 0.055 38.31 25.91 0.72 ' 28.66 4.88 380.88 * 2. 18 0_00 2 .18 0.00 0.055 38 .76 25.98 0.74 29.66 4.90 380.90 * 2 .21 0.00 2 .21 0.00 0 .055 39.22 26.05 0.76 30.66 4.93 380.93 * 2.24 0.00 2.24 0.00 0.055 39.90 26.16 0.77 31.66 4.96 380.96 * 2.27 0.00 2.27 0.00 0.055 40 .58 26.27 0. 78 32.66 4.99 380.99 * 2.30 0.00 2.30 0.00 0.055 41 .27 26.38 0.79 � 33.66 5.02 381.02 * 2 .33 0.00 2.33 0.00 0.055 41.96 26.48 0.80 ' 34.66 5.05 381.05 * 2.36 0.00 2.36 0.00 0.055 42 .65 26.59 0_81 ****REACH NO. 3: LENGTH= 155.00 FT AVG.GRADE= 1 .49$ **** STATION 520.00: INVERT= 378.31 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT{FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT} N-FACTOR 5.00 1.69 0.055 * 5.00 1.69 0.055 10.00 1.69 0.055 * 10.00 1.69 0.055 16.00 5.69 0.055 * 16.00 5.69 0. 055 Q{CFS) Y1 (FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 WP-Y1 V-Yl ��************************�**************************************************** 24.66 2.59 380.90 * 1.46 0.00 1.46 1.84 0.055 27 .66 23 .80 0.89 25.66 2_61 380.92 * 1.48 0.00 1.48 1.85 0.055 28 .12 23.87 0. 91 26.66 2 .63 380.94 * 1.50 0.00 1.50 1.86 0.055 28. 58 23.94 0. 93 27.66 2 .65 380.96 * 1.53 0.00 1.53 1.88 0.055 29. 03 24.02 0.95 28.66 2.68 380.99 * 1.55 0.00 1.55 1.89 a .055 29.72 24.13 0. 96 29.66 2 .70 381.01 * 1.57 0.00 1.57 1.90 0.055 30 .18 24.20 0.98 30.66 2 .73 381.04 * 1.59 0.00 1.59 1.92 0.055 30 .87 24.31 0.99 31.66 2 .76 381.07 * 1.61 0.00 1.61 1.93 0.055 31.57 24.41 1.00 32 .66 2 .79 38i.10 * 1.63 0_00 1.63 1.94 0.055 32 .26 24.52 1. 01 33 . 66 2 .82 381. 13 * 1.65 0 .00 1.65 1.95 0 .055 32 .97 24.63 1. 02 34. 66 2 . 85 381 . 16 * 1. 67 0 .00 1.67 1.97 0 .055 33 . 67 24.7� 1 . 03 ****REACH N0. 4: LENGTH= 140.00 FT ATJG.GRADE= -0 . 19� *'�** STATION 660.00: INVERT= 378.04 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE{FT) N-FACTOR 5.00 1.96 0.055 * 5.00 1.96 0.055 10.00 1.96 0.055 * 10.00 1.96 0.055 16.00 3 .96 0.055 * 16.00 3 .96 0.055 Q(CFS) Y1{FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Y1 WP-Y1 V-Yl **************�**�**�**********************�**�*��***�***�*******�*�*****�**�** 24.66 2 .97 381_O1 * 1.55 0.00 1.55 0 .00 0.055 33 .06 27_13 0.75 25 .66 3 .00 381.04 * 1.57 0.00 1.57 0.00 0.055 33 .84 27.32 0.76 26.66 3 .02 381.06 * 1.60 0.00 1.60 0 .00 0.055 34.37 27 .44 0.78 27 .66 3 .04 381.08 * 1.62 0.00 1.62 0.00 0.055 34.90 27 .57 0.79 28.66 3.07 381.11 * 1.64 0.00 1.64 0.00 0.055 35_70 27.76 0.80 29.66 3 .10 381.14 * 1.67 0.00 1.67 0.00 0.055 36_50 27.95 0.81 30.66 3.13 381.17 * 1.69 0.00 1.69 0.40 0.055 37 _31 28_14 0.82 31.66 3 .16 381.20 * 1.71 0.00 1.71 0.00 0.055 38.12 28.33 0.83 32 .66 3 .19 381.23 * 1.73 0.00 1.73 0.00 0.055 38.94 28 .52 0. 84 33 .66 3 .21 381.25 * 1.75 0.00 1_75 0.00 0.055 39.49 28 .65 0.85 34.b6 3 .24 381.28 * 1.77 0. 00 1.77 0. 00 0.055 40.31 28.84 0.86 ****REACH N0. 5: LENGTH= 130.00 FT AtiG.GRADE= 0.35$ **** STATION 790.00: INVERT= 378.50 FT EC=1_50 Q-RATI0=0 .00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT{FT) STAGE(FT) N-FACTOR * RIGHT{FT) STAGE(FT) N-FACTOR 5.00 1.50 0.055 * 2.00 1.50 0.055 20.00 4.24 0.055 * 40.00 5.50 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 WP-Y1 V-Y1 *�*********************************************************************�******* 24 .66 2 .65 381.15 * 1.64 0.00 1.64 2 .40 0.055 23 .20 25.11 1.06 25 .66 2.68 381.18 * 1.67 0.00 1.67 2.42 0.055 23 .94 25.56 1.07 26 .66 2 .70 381.20 * 1.70 0_00 1.70 2 .45 0.055 24.43 25.86 1. 09 27.66 2_73 381.23 * 1.73 0.00 1.73 2 .48 0.055 25.19 26.31 1. 10 28 .66 2.76 381.26 * 1.75 0.00 1 .75 2 .50 0.055 25.96 26_77 1. 10 ' 29 .66 2 .79 381.29 * 1.77 0.00 1.77 2 .53 0.055 26.74 27 .22 l.11 30.66 2 .82 381.32 * 1.80 0.00 1.80 2.55 0.055 27.54 27 .68 1.11 31.66 2 .84 381.34 * 1_82 0.00 1.82 2 . 57 0.055 28_07 27 .98 1.13 ', 32 .66 2.87 381.37 * 1.84 0.00 1.84 2. 60 0_055 28.89 28.43 1.13 � 33 .66 2 . 90 381.40 * 1.86 0.00 1.86 2 . 62 0 .055 29 .72 28.88 1.13 ' �4.66 2 . 92 381 .42 * 1.88 0. 00 1 .88 2 . 64 0 .055 30 .29 29 .19 1. 14 � ****REACH PdO. 6: LENGTH= 75.00 FT AVG.GRADE= -4.53$ **** II STATION 865.00: I�'ERT= 375.10 FT EC=1 .50 Q-RATI0=0 . 00 II CROSS-SECTION DATn: DIST/STAGE IS PQE�_SURED FROM INVERT; N-FAC IS ME.ASURED BETVdEEN STAGES _ _ _ __ _ ___ ____ _ _ LEFT(FT} STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 2.00 2 .90 0.055 * 2.00 2.90 0.055 27.00 8.90 0.055 * 25.00 8.90 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 WP-Y1 V-Y1 **�********************************�******************************************* 24 .66 6.15 381.25 * 2.61 0.00 2 .61 0.00 0.055 61.05 33 .85 0.40 25.66 6 .18 381.28 * 2.65 0.00 2 .65 0.00 0.055 61.95 34.09 0.41 26.66 6.20 381.30 * 2.69 0.00 2 .69 0.00 0.055 62 .56 34.26 0.43 27 .66 6.23 381.33 * 2.73 0.00 2 .73 0.00 0.055 63 .48 34.51 0.44 28.66 6.26 381.36 * 2.77 0. 00 2 .77 0.00 0.055 64.40 34.75 0.45 29.66 6.29 381.39 * 2.81 0.00 2 .81 0.00 0.055 65.33 35.00 0.45 30.66 6.32 381.42 * 2.84 0.00 2.84 0.00 0.055 66 .27 35.25 0.4b 31.66 6.34 381.44 * 2.88 0.00 2 .88 0.00 0.055 66.89 35.41 0.47 32 .66 6.37 381.47 * 2.97 0.00 2 .97 0.00 0.055 67 .84 35.66 0.48 33 .66 6.40 381.50 * 3.06 0 .00 3 .06 0.00 0.055 68.80 35.91 0.49 34.66 6.42 38�5'� * 3.12 0.00 3 .12 0.00 0.055 69.44 36.07 0.50 �� ***�REACH N0. 7 : LENGTH= 120.00 FT AVG.GRADE= 0.00$ **** STATION 985.00: INVERT= 375.10 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 2 . 90 0.055 * 5.00 2 .96 0. 055 21.00 4.90 0.055 * 28.00 4.90 0. 055 39.00 8.90 0.055 * 50.00 6.90 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Y1 WP-Y1 V-Y1 ******************************************************************************* 24.66 6.17 381.27 * 1.82 0.00 1.82 0.00 0.055 147.39 70.68 0.17 25.66 6 .20 381.30 * 1.84 0.00 1.84 0.00 0.055 149.46 71.15 0_17 ' 26.66 6 .22 381.32 * 1.87 0.00 1.87 0.00 0.055 150.84 71.46 0.18 27 .66 6.25 381.35 * 1.90 0.00 1.90 0.00 0.055 152 .93 71.93 0.18 ' 28.66 6_28 381.38 * 1.93 0.00 1.93 0.40 0.055 155.04 72_40 0.18 29.66 6.31 381.41 * 1.95 0.00 1.95 0.a0 0.055 157.16 72 .87 0.19 30.66 6.34 381.44 * 1.98 0.00 1.98 0.00 0.055 159 .29 73.34 0. 19 31.66 6.36 381.46 * 2.01 0.00 2 .01 0.00 0 .055 160.72 73.65 0.20 32.66 6.39 381.49 * 2.03 a.00 2.03 0.00 0 .055 162 .88 74.12 0.20 33 .66 6 .42 381.52 * 2.06 0.00 2.06 0.00 0.055 165.05 74.59 0.20 I 34.66 6 .44 381.54 * 2.08 0.00 2.08 0.00 0 .055 166.50 74.91 0.21 I ld� ��- (�'�-c.��r�2 1 ( .��1� - Z_ BACKWATER COMPUTER PROGRAM FOR OPEN CH:'1dI'��LS Channel Data Filename:11556-2 .bwc Tailwater Elevation:380.36 fee� Discharge Range:64.9 to 74.9 Step of l. [cfs; STATION 0.00 : I:WERT= 37b.2? �T EC=1 . 70 Q-Pt�TIv=0 . 00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM IDI`,�ERT; P1-F�C IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT{FT) STAGE(FT) N-FACTOR 5 .00 3.73 0.055 * 5.00 3 .73 0.055 10.00 3 .73 0.055 * 10.00 3 .73 0.055 16.00 7.73 0.055 * 16.00 7.73 0:055 Q(CFS) Yl(FT) WS ELEV. * YC-IN YN-IN Q-TW TW-HT N-Y1 A-Y1 WP-Y1 V-Y1 ***�***********************�***�*�*��**�***********�*****�***,�***************** 64.90 4. 09 380.36 * 2.94 4.00 0.00 4.09 0.055 26 .04 23 .77 2_49 65.90 4. 09 380.36 * 2.96 4.01 0.00 4.09 0_055 26 .04 23 .77 2_53 66.90 4. 09 380.36 * 2.98 4.03 0 .00 4.09 0_055 26 .04 23_77 2 .57 67.90 4. 09 380.36 * 3.00 4.04 0.00 4.09 0.055 26.04 23 .77 2 .61 68.90 4.09 380_36 * 3.01 4.05 0.00 4.09 0.055 26.04 23 .77 2 .65 59.90 4.09 380.36 * 3.03 4.06 0 .00 4. 09 0.055 26.04 23 .77 2 .68 70.90 4.09 380.36 * 3.05 4.07 0.00 4. 09 0.055 26.04 23 .77 2.72 71.90 4.09 380.36 * 3.07 4.08 0.00 4. 09 0.055 26.04 23.77 2.76 72.90 4.09 380.36 * 3.08 4.09 0.00 4. 09 0.055 26.04 23 .77 2 .80 73 .90 4.10 380.37 * 3.10 4.10 0.00 4.09 0.055 26.26 23 .81 2 .81 74.90 4.12 380.39 * 3.12 4. 12 0.00 4.09 0.055 26.68 23 .88 2 .81 ****REACH NO_ l: LENGTH= 240.00 FT AVG_GRADE= 0 .95� **** STATION 240.00: INVERT= 378.56 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE{FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 1.44 0.055 * 5.00 1.44 0.055 10.00 1.44 0.055 * 10.00 1.44 0.055 16.00 5.44 0.055 * 16.00 5.44 0.055 Q(CFS) Yl(FT} WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Yl j��P-Y1 V-Y"� ***************************************************�**************************� 64.90 3 .00 381.56 * 1.88 0.00 1.88 2_24 0.055 42 .05 26_03 1.5� 65.90 3.03 381.59 * 1.88 0.00 1.88 2.25 0_055 42.79 26.14 1 .5� 66.90 3 .06 381.62 * 1.89 0.00 1.89 2 .26 0.055 43 .54 26.25 1 .5� 67.90 3 .09 381.65 * 1.90 0.00 1.90 2 .27 0.055 44.28 26.36 1_53 68.90 3 .12 381.68 * 1.91 0.00 1.91 2.28 0_OSS 45 .03 26.46 1.53 69.90 3 .15 381.71 * 1.92 0.00 1.92 2 .29 0.055 45.79 26.57 1 .53 70.90 3.18 381.74 * 1.92 0.00 1.92 2 .30 0_055 46.54 26.68 1 .52 71.90 3 .21 381.77 * 1.93 0.00 1.93 2 .31 0_055 47.30 26.79 1 .52 72 .90 3 .24 381.80 * 1.94 0.00 1.94 2.32 0_055 48.06 26.90 1.52 73 .90 3 .26 381.82 * 1.95 0. 00 1 .95 2 . 33 0 .055 48.57 26.97 1 .52 74.90 3 .26 381 .82 * 1.96 0. 00 1 . 96 2 . 34 0 .055 48 . 57 26 .97 1 .54 ****REACH N0. 2 : LENGTH= 125.00 FT AVG.GRADE= -2.05$ **** �', STATION 365_00: INVERT= 376.00 FT EC=1.50 Q-RATI0=0 .00 I, CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FTj STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 4.00 0.055 * 5.00 4.00 0.055 10.00 4.00 0.055 * 10.00 4.00 0.055 16.00 8 .00 0.055 * 16.00 8 .00 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Yl WP-Yl V-Y1 xx***********************************************************�********�******** 64.90 5.74 381.74 * 3.03 0.00 3.03 0.00 0.055 59.34 2.9.08 1.09 65.90 5.77 381.77 * 3.04 0.00 3 .04 0.00 0.055 60.10 29. 19 1.10 66 .90 5.79 381.79 * 3 .06 0.00 3 .06 0.00 0.055 60.61 29.26 1.10 67.90 5.82 381.82 * 3 .08 0.00 3.08 0.00 0.055 61.37 29.37 l.11 68.90 5.85 381.85 * 3.10 0.00 3 .10 0.00 0.055 62 . 13 29.48 1.11 69 .90 5.88 381.88 * 3.12 0.00 3 .12 0.00 0_055 62. 90 29. 58 1.11 70 .90 5.90 381.90 * 3.13 0.00 3 .13 0.00 0_055 63 .41 29.66 1.12 71.90 5.93 381.93 * 3.15 0.00 3 .15 0.00 fl .055 64.19 29.76 1.12 72 .90 5.96 381.96 * 3.17 0.00 3 .17 0.00 0_055 64.96 29.87 1.12 73 .90 5 .98 381.98 * 3.19 0.00 3 . 19 0.00 0 .055 65 .48 29.95 1.13 74.90 5 .98 381 .98 * 3.20 0.00 3 .20 0 .00 0 .055 65 .48 29.95 1 . 14 ****REACH NQ. 3 : LENGTH= 155.00 FT AVG.GRADE= 1.490 **** STATION 52Q. 00 : IN`,�ERT= 378.31 FT �C=1 .50 Q-Rr^.TI0=0 .00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 1.b9 0.055 * 5.00 1.69 0.055 10.00 1.69 0.055 * 10 .00 1.69 0. 055 16.00 5.69 0.055 * 16 .00 5.69 0. 055 Q(CFS) Yl(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Y1 WP-Yl V-Yl �******************************************�*****************�*****�*********** 64.90 3 .55 381.86 * 2.07 0.00 2 .07 2 .29 0.055 50.84 27 .26 1.28 65.90 3 .58 381.89 * 2 .07 0.00 2 .07 2 .30 0.055 51.61 27.37 1.28 66.90 3 .60 381.91 * 2 .08 0.00 2 .08 2 .31 0_055 52 . 12 27.44 1.28 67 .90 3 .63 381.94 * 2.09 0.00 2 .09 2 .32 0 .055 52 . 90 27 .55 1.28 68.90 3 .66 381.97 * 2.10 0.00 2 .10 2.32 0.055 53 . 67 27. 66 1.28 69.90 3 .68 381.99 * 2.11 0.00 2 .11 2.33 0.055 54.19 27.73 1.29 70.90 3 .70 382.01 * 2.11 0.00 2 .11 2 .34 0.055 54_71 27.80 1 .30 71.90 3 .73 382 .04 * 2.12 0.00 2.12 2 .35 0.055 55.49 27.91 1.30 72 .90 3.76 382 .07 * 2.13 0.00 2. 13 2.36 0.055 56.28 28.02 1 .30 73 .90 3 .78 382_09 * 2.14 0.00 2. 14 2 .37 0.055 56. 80 28.09 1 .30 74 . 90 3 .79 382 .10 * 2 . 14 0 .00 2 . 14 2 . 38 C . 055 57 . 06 28 . `�3 1 . 31 ****REF:CH P�O. 4 : LENGTH= 140. 00 F`I' AVG.GR.�?DE= -0 . 190 **** STATION 660.00: INVERT= 378.04 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT{FT) STAGE(FT) N-FACTOR 5.00 1.96 0.055 * 5.00 1.96 0.055 10.00 1.96 0.055 * 10.00 1.96 0.055 16.00 3 .96 0.055 * 16.00 3 .96 0 .055 Q(CFS) Y1 (FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 WP-Y1 V-Y1 *******************�*****************************�****�************************ 64.90 3_95 381.99 * 2.27 0.00 2.27 0.00 0.055 61.48 33_33 1.06 **************** OVERFLOW ENCOUNTERED AT 65.90 CFS DISCHARGE ***************** 65.90 3 .98 382.02 * 2.28 0.00 2.28 0.00 0.055 62 .44 33 .43 1.06 66.90 4.00 382.04 * 2.29 0.00 2 .29 0.00 0.055 63.08 33 .47 1.06 67.90 4.03 382.07 * 2.30 0.00 2.30 0.00 0.055 64.04 33 .53 1.06 68.90 4_06 382 .10 * 2.31 0.00 2 .31 0.00 0.055 65 .00 33 .59 1.06 69.90 4.08 382.12 * 2.31 0.00 2.31 0.00 0.055 65 .64 33 .63 1.06 70.90 4.10 382.14 * 2.32 0.00 2 .32 0.00 0.055 66.28 33.67 1 .07 71.90 4.13 382.17 * 2.33 0.00 2.33 0.00 0.055 67.24 33.73 1.07 72.90 4.15 382.19 * 2.34 0.00 2.34 0.00 0.055 67.88 33 .77 1 .07 73.90 4_17 382.21 * 2.35 0.00 2 .35 0.00 0.055 68.52 33 .81 1.08 74.90 4.19 382.23 * 2.35 0 .00 2 .35 0.00 0.055 69.16 33 .85 1_08 ****REACH NO. 5 : LENGTH= 130 .00 FT AVG.GRADE= 0.35$ **** STATION 790_00: INVERT= 378.50 FT EC=1.50 Q-RATI0=0. 00 CROSS-SECTION DATA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 1.50 0 .055 * 2.00 1.50 0.055 20.00 4.24 0.055 * 40.00 5.50 0.055 Q(CFS) Y1{FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Yl A-Y1 ���IP-Y1 `,.�'-Y1 ********************************************************************x******�*�� 64.90 3.62 382.12 * 2.30 0.00 2.30 3.15 0.055 53 .74 39 .77 1.21 65.90 3 .65 382.15 * 2.31 0.00 2.31 3 .17 0.055 54.91 40 .22 1 .20 66.90 3.67 382.17 * 2.32 0.00 2 .32 3 .18 0.055 55.70 40 .53 1 .20 67.90 3 .69 382.19 * 2.33 0.00 2 .33 3 .19 0.055 56.49 40 .83 1.20 68.90 3.72 382.22 * 2.34 0.00 2 .34 3 .21 0.055 57 .69 41.28 1 .19 69.90 3.74 382.24 * 2.35 0.00 2 .35 3 .22 0.055 58.50 41.58 1.19 70.90 3 .76 382 .26 * 2.36 0.00 2 .36 3 .23 0.055 59.31 41.89 1.20 71.90 3.79 382.29 * 2.37 0.00 2 .37 3.24 0.055 60.54 42 .34 1.19 72 .90 3 .81 382 .31 * 2.38 0.00 2 .38 3.26 0.055 61.37 42 .64 1.19 73.90 3 .83 382.33 * 2.39 0.00 2 .39 3 .27 0.055 62 .21 42 .94 1.19 74.90 3 .85 382 .35 * 2.40 0. 00 2 .40 3 .28 0.055 63 .05 43 .25 1 . 19 ****REACH NO. 6: LENGTH= 75.00 FT AVG.GRADE= -4.53� **** STATION 865. 00: INVERT= 375.10 FT EC=1.50 Q-RATI0=0. 00 CROSS-SECTION D�.TA: DIST/STAGE IS MEASURED FROM INVERT; N-FAC IS MEASURED BETWEEN STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOP. 2.00 2 .90 0.055 * 2 .00 2.90 0.055 27.00 8.90 0.055 * 25.00 8.90 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 �^1P-'sl V-Y� ****************************,r************�***«************************�******** 64.90 7.11 382.21 * 3.85 0.00 3 .85 0.00 0.055 93 .54 41.76 0.69 65.90 7.13 382.23 * 3.86 0.00 3 .86 0.00 0.055 94.29 41.93 0.70 66.90 7.15 382.25 * 3.88 0.00 3 .88 0.00 0.055 95.05 42 .09 0.70 67 .90 7.17 382.27 * 3.90 0.00 3 .90 0.00 0.055 95.81 42 .26 0.71 68.90 7.20 382.30 * 3.91 0.00 3 .91 0.00 0.055 96.96 42 .51 0.71 69.90 7.22 382 .32 * 3.93 0.00 3 .93 0.00 0.055 97.73 42 .67 0.72 70.90 7.24 382.34 * 3.94 0.00 3 .94 0.00 0.055 98.50 42 .84 0.72 71.90 7.27 382.37 * 3.95 a.00 3 .95 0.00 0.055 99.67 43 .08 0.72 72 .90 7.29 382.39 * 3.97 0.00 3 .97 0.00 0.055 100.45 43 .25 0_73 73 .90 7.31 �8�1 * 3.98 0.00 3 .98 0.00 0.055 101.23 43 .41 0 .73 74.90 7.33 ` 382.43 * 4.00 0 . 00 4.00 0. 00 0 .055 102 . 02 43 . 58 0 .73 �__ ****REACH NO. 7: LENGTH= 120.00 FT AVG.GRADE= 0.00$ **** STATION 985.00: INVERT= 375.10 FT EC=1.50 Q-RATI0=0.00 CROSS-SECTION DATP.: DIST/STAGE IS MEi-�SURED FROh1 IP��JERT; Td-FAC IS MEASURED BET?^]EEP1 STAGES LEFT(FT) STAGE(FT) N-FACTOR * RIGHT(FT) STAGE(FT) N-FACTOR 5.00 2 .90 0.055 * 5.00 2.96 0.055 21.00 4.90 0.055 * 28.00 4.90 0.055 39.00 8.90 0.055 * 50.00 6.90 0.055 Q(CFS) Y1(FT) WS ELEV. * YC-IN YN-IN YC-OT YN-OT N-Y1 A-Y1 P7P-Yl V-Yi *,r**,r*,r****,r************************************:*****,r***********************< **************** OVERFLOW ENCOUNTERED AT 64.90 CFS DISCHARGE ***************** 64.90 7:14 382.24 * 2 .67 0.00 2 .67 0.00 0.055 220.99 83 .45 0.29 65.90 7.16 382.26 * 2 .69 0.00 2.69 0.00 0.055 222 .61 83.57 0.30 66.90 7.18 382.28 * 2.70 0.00 2 .70 0.00 0.055 224.24 83 .68 0.30 67 .90 7.20 382.30 * 2.72 0.00 2 .72 0.00 0.055 225.86 83_79 0.30 68.90 7.23 382.33 * 2 .74 0.00 2.74 0.00 0.055 228 .30 83.96 0.30 69.90 7.25 382.35 * 2 .75 0.00 2.75 0.00 0.055 229 .94 84.07 0.30 70.90 7.27 382.37 * 2 .77 0.00 2.77 0.00 0.055 231.57 84_18 0.31 71.90 7.30 382.40 * 2.78 0.00 2.78 0.00 0.055 234.02 84.35 0.31 72 .90 7.32 382.42 * 2.80 0.00 2.80 0.00 0.055 235.66 84.46 0.31 73 .90 7.34 382.44 * 2.81 0. 00 2.81 0.00 0.055 237.30 84.58 0.31 74.90 7 .36 382 .46 * 2 .83 0. 00 2 .83 0.00 0.055 238 . 94 84 . 69 0.31 SUPPLEMENTAL STORM DRAINAGE CALCULATION Backwater Analysis for Conveyance System Ribera Short Plat NW1/4 of NW1/4 of Sec 15, Twn. 23N, Rng. 5E Renton, Washington Prepared for: Seattle Mortgage G� A• T.q f l 6450 Southcenter Boulevard, Suite 106 �4'�P�oF WA,,y�tic 9 '�`2f� Seattle, Washington 98188 Q, y o� � G y 37819 Q' Q�O,c�FGISTER����� FSS�ONALENG\ Revised November 21 , 2005 EXPIRES:6-23-.?Q7lo October 7, 2005 Ou�Job No. 11556 GNAV � �r�,s� � Z CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES o � 18215 72ND AVENUE SOUTH, KErvT WA 98032 i �/��V` r G` �g. 6 'hG ENG�� � ' TW=STATIC WS BARGHAUSEN CONSULTING ENGINEERS BACKWATER ANALYSIS SPREADSHEET DEFAULTS LEGEND AREA- full cross sectionai area of the pipe(sq.ft.) OC EL- oultet control elevation n- 0.012 UP CB- upstream catch basin VEL- full velocity in pipe(ft/sec) IC EL- inlet control elevation SIZE- 12 DN CB- downstream catch basin VEL-HD-velocity head(ft) AVH- approach velocity head(ft) Ke- 0.5 Q- design flow(cfs) TW EL- tail water elevation Kb- bend loss coefficient Kb- 0.05 L- length of pipe segment(ft) FL- FL-friction loss(ft) BHL- bend head loss(ft) Kj 0.14 SIZE- indicate pipe diameter(inches) EN HGL-entrance hydraulic grade line elevation Kj- junction head loss coefficient n- Manning's"n"value Ke- entrance head loss coefficient JHL- junction head loss(ft) OUT EL.- outlet elevation of pipe segment EN HL- entrance head loss(ft) HW EL-head water elevation IN EL.- inlet elevation of pipe segment EX HL- exit head loss(ft) ON CB UP CB Q cfs L SIZE n OUT EL. IN EL. AREA VEL VEL-HD TW EL. FL EN HGL Ke EN Hl. EX HL OC EL. IC EL. AVH Kb BHL JHL HW EL 25-yr Pond 4 6.2 32 15 0.012 378.15 378.50 1.23 5.04 0.39 385.04 0.25 385.29 0.50 0.20 0.39 385.88 -0.19 0.050 0.020 385:71 4 3 4.3 150 15 0.012 378.50 380.00 1.23 3.50 0.19 385.71 0.56 386.27 0.50 0.10 0.19 386.56 -0.22 0.050 0.010 386.35 3 2 2.9 150 12 0.012 380.00 381.50 0.79 3.74 0.22 386.35 0.86 387.21 0.50 0.11 0.22 387.54 -0.08 0.050 0.011 387.47 2 1 1.8 150 12 0.012 382.15 373.78 0.79 2.28 0.08 387.47 0.32 387.79 0.50 0.04 0.08 387.91 0.00 0.050 0.004 387.9a 100-yr � Pond 4 7.2 32 15 0.012 378.15 378.50 1.23 5.84 0.53 385.0 0.33 385.37 0.50 0.27 0.53 386.17 -0.26 0.050 0.027 385.94 4 3 5.0 150 15 0.012 378.50 380.00 1.23 4.06 0.26 385.94 0.75 386.69 0.50 0.13 0.26 387.08 -0.29 0.050 0.013 386.80 3 2 3.4 150 12 0.012 380.00 381.50 0.79 4.32 0.29 386.8 1.15 387.95 0.50 0.14 0.29 388.38 -0.11 0.050 0.014 388.29 2 1 2.1 150 12 0.012 382.15 373.78 0.79 2.62 0.11 388.29 0.42 388.71 0.50 0.05 0.11 388.87 0.00 0.050 0.005 388,88 Page 1 1 - �-i�»� � , � 4.2.I PiPE SY MS—METHODS OFANALYS]S FIGURE 4.2.1.I BACKWATER CALCULATION SHEET NOTES II Column(1) - Design tlow to be conveyed by pipe segment. '� Column(2) - Length ofpipe segment. Column(3) - Pipe Size;indicate pipe diameter or span x rise. I Column(4) - Manning's"n"value. Column(5) - Outlet Elevation ofpipe segment. Column(6) - Inlet Elevauon of pipe segment. Column(7) - Barrel Area;this is the full cross-sectional area of the pipe. Column(8) - Ba[rel Velocity;this is the full velociry in the pipe as determined by: Y= Q/A or CoL(8) = CoL(1)/Col.(7) Column(9) - Barrcl Velociry Hcad = V/2g or (CoL(8))%2g where g=32.2 R/sec (acceleration due 10 gravity) I Column(10) - Tailwater(7'{f�Elevation;,this is the water surface elevation at the outlet of the pipe segmenL If the pipe's outlet is not submerged by the TW and the TW depth is less than(D+d�2,set TW equal to(D+d.�2 to keep the analysis simple and still obtain reasonable results(D=pipe barrel height and d�=critical dept6,both in feet_ See Figure 43_I.F(p.4-49)for detemunatioo of d�). Column(ll) - FrictionLoss = S�xL [or SfxCol.(2)] where Sfis the friction slope or head loss per linear foot ofpipe as determined by Manning's equation expressed in the form: Sl= (n T7�/2.22 R➢ � Column(12) - Hydraulic Grade Line(HGL)Efevation just inside the entrance of the pipe bazrel;t6is is determined by adding the friction loss to the TW elevation: Col.(12) =CoL(11}+CoL(10) If this elevaRon fa4s below t6e pipe's inlet crown,il no longer represents the We HGL when comp�ted in this manner. The we HGL will fall somewhere between the pipe's crown and either normal flow depth or critical ttow depth,whichever is greater. To keep the analysis simple and still obtain reasonable results(i.e.,emng on the conservative side),set the HGL elevation equal to the crown elevatioo. Column(13) - Enuance Head L.oss = K x Vl2g [or K�x Col.(9)j where K�= Entrance Loss Ccefficient(from Table 43.1.B,p.4�2). This is the head lost due to flow contractions at the pipe enVance. Column(14) - Exit Head Loss = I A x i,l2g or 1.0 x Col.(9) This is the velocity head lost or transferred downstream. Cotumn(IS) - OuUetControlElevation = Col.(12)+Col.(13)+CoL(14) This is 1he maximum headwater elevation assuming the pipe's barrel and inleUouUet characteristics are controtling capacity. It does not include structure losses or approach velocity coasiderations. Column(16) - Inlet Conirol Elevation(see Section 43.11,page 439,for computalion of inlet control on culverts);this is the rnaximum headwaler elevation assuming t6e pipe's inlet is controlIing capacity. lt dces not include structure losses or approach velceity considerations. Column(17) - Approach Velceity Head;this is the amount of head/energy being supplied by Ihe discharge from an upstream pipe or channel section,which serves to reduce the headwater elevation. If 1he discharge is from a pipe,the approach velociry head is equal to the barrel vetocity head computed for the upslream pipe. If the upstream pipe outlet is significantly higher in elevation(as in a drop manhole)or lower in eievation such that its discharge energy would be dissipated,an approach velceity head of zero should be assumed_ Column(18) - Bend Head Loss = Ka x ijl2g [or K6 x Col.(17)] w6ere K6 = Bend Loss Ccefficient(from Figure 4.2.1.K,p.4-27). 71�is is the loss of head/energy required to change direction of flow in an access structure. Column(19) - Janction Head Loss. 'ILis is the koss in 6ead/eoergy that results from the turbulence created ufien two or more streams are merged into one within the access structure. Figure 4.2.I.L(p.4-28)may be used to determine this bss,or it may be computed using the following equations derived from Figure 4.2.1.L: Junction Head Loss = K�x V72g [or K�x CoL(17)] where K�is the Junction Loss Ccefficient detertnined by: Ki – (Q�Q�)1(1.18+0.63(Q�Qi)) Column(20) - Headwater(HV1�Elevation;this is determined by combining the energy heads in Columns 17,I8,and 19 with the 6ighest control elevation in either Column I S or 16,as follows: Col.(20) = Col.(15 or 16)-Col.(I�+CoL(18}+Col.(19) '. 2005 Svrface Water Design Manual 1l24/2005 4-25 -n � I O �`° � N pp � o � g i'� � � ' ° �,�, I C m � N tA z Z N n p WS�105.84 � b Z CB#2 � � CB#1 WS_ • O WS_ 103.90 'HG� � PROJ. � 103.26 + G�S INLET C r I HGL �'�� , MQ � �, $ G IE=104.0 ;r� a TW=102.0 HGL ��� g0'�'Ig°lo ^' � Q_1p cfs �2• � b �---- 110'..18"CP y � 80'-18"CP (c� 0.91% n � 0.63% IE=101.5 � i E=100.5 � 'ti�, IE=100.0 � � � ►d � n B A C K W A T E R C A L C U L A T I O N S H E E T j--r—Select the greater elevation n (�) (2) (3) (a) (5) (6) (�) (8) (9) (1�) (1�) (�2) (y 3) (�4) (�5) ('�e) (1�) (�8) (�9) (20) C Barrel Fric- Entr Entr Exit Outlt Inlet Appr Bend Junc � P�Pe Outlet Intlet Barrel Barrel Vel TW tion HGL Head Head Contr Contr Vel Head Head HW Segment p Len th Pipe "n" Elev Elev Area Vel Head Elev Loss Elev Loss Loss Elev Elev Head Loss Loss Elev CB to CB (cfs) (ft}� Size Value (ft) (ft) (sqft) (fps) (ft) (ft) (ft) (R) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) Z V� ��� 5'�v°'^�a � � U�p�M ��it,,�� v n ,�S.Q�'�� +k'�e?�; : .,,' , .. . ( .. , ' . ;. � t �',�, -� �e �tS�;�� ��0���'� ��� `��'q ^�;�s� =o.�o �oz�oo o.s2 ioz.s� 0.25 0.�0' ioa.sz io2.�5 -o.is `o.00z o.a� �os.2s x � fall , . h,,. �� Y . ,. � b g 1 2 6 110 18" 0 012 100 50 101 50 1 77 3 39 018 103,26 0.31 103 57 0.09 0.18 �03.84 102.95 •0.18 0,24 0.0 103.90 r � .G.� i h y la s�u"� f� °�.x i� '�i�. x � R R�r "� ��' r�� ��a c x '��ffi�1� _; „ :. -, . � , . .,.. : :. ._. . .... .:. � � ':� �f�let 8,;� r 9Q'^ ����,` O q��' �bi���1��,'1, ;i��3s 0.18 103�5b 1, � �4'9) '' 105,84 105.80 " � � �0 0.16 �.18 -O.Q OA 0.0 105,84 �' c ifl5.5 . .., C w � ry ,.. �, .n T k r• � r ��. ��y �, �_ � � ,�E x s. .:�`�'r��`'`� . � ��y- 4 � � G ry, �`�,. C r :x :u�C„ a ;k 5�'���. �� ��.�r'S '4E � r � ` . �-. � (V'/�r � 1'� �A 3�� :' b 'tr�!.�i W A l' i' 1 w. �r � �� �'�: ���� � �nv�r' �h� �'� v �. ��' �a.f�_ "s ���e `� ' '��`a � �," ��r. �� gµx� i �?; � h �`� t , , . . . , p, . . . �ti�'^,e, �,d�� ! . . � , , , m, . � ... ,... � , v.,. • . . .,��5�,� . , . . , ..- . .. . � . .. ...� `� ....�' �1 i 11556-25yr.xls BARGHAUSEN CONSULTING ENGINEERS-PIPE FLOW CALCULATOR using the Rational Method�Manning Formula KING COUNTY DESIGN FOR 25 YEAR STORM JOB NAME: RIBERA/BALKO NOT�:ENTER DEFAULTS AND STORM DATA BEFORE BEGINNING JOB#: 7546 DEFAULTS C= 0.9 n= 0.012 FILE NO.: 7546-25.XLS d= 12 Tc= 6.3 A=Contributing Area(Ac) Qd=Design Flow(cfs) COEFFICIENTS FOR THE RATIONAL METHOD"Ir"-EQUATION C=Runoff Coefficient Qf=Full Capacity Flow(cfs) STORM Ar Br I Tc=Time of Concentration(min) Vd=Velocity at Design Flow(fps) 2YR 1.58 0.58 1=Intensity at Tc(in/hr) Vf=Velocity at Full Flow(fps) 10YR 2.44 0.64 PRECIP= 3.45 d=Diameter of Pipe(In) s=Slope of pipe(%) 25YR 2.66 0.65 Ar= 2.66 L=Length of Pipe(ft) n=Manning Roughness Coefficient SOYR 2.75 0.65 Br= 0.65 D=Water Depth at Qd(in) Tt=Travel Time at Vd(min) 100YR 2.61 0.63 FROM TO A s L d Tc n C SUM A A'C SUM A`C I Qd Qf Qd/Qf D/d D Vf Vd Tt CB 1 CB2 0.76 0.50 186 12 6.3 0.012 0.85 0.76 0.65 0.65 2.77 1.79 2.73 0.657 0.593 7.12 '3.48 '3.71 0.84 C62 C63 0.57 1.00 115 12 7.1 0,012 0,85 1.33 0.48 1.13 2.56 2.89 3.86 0.750 0.645 7.75 4.92 5.40 0.38 CB3 CB4 0.70 1.00 150 15 7.5 0.012 0.85 2.03 0.80 1.73 2.48 4.28 7.00 0,611 0,569 8.53 5.71 6,00 0.42 C64 POND 0.94 1.25 32 15 7,9 0,012 0.9 2.97 0.85 2.57 2,39 6.15 7.82 0.787 0.668 10.02 6.38 7.06 0.08 Page 1 11556-25yr.xls BARGHAUSEN CONSULTING ENGINEERS-PIPE FLOW CALCULATOR using the Rational Method 8 Manning Formula KING COUNTY DESIGN FOR 100 YEAR STORM JOB NAME: RIBERA/8ALK0 NOTE:ENTER DEFAULTS AND STORM DATA BEFORE BEGINNING JOB#: 7546 DEFAULTS C= 0.9 n= 0.012 FILE NO.: 7546-25.XLS d= 12 Tc= 6.3 A=Contributing Area(Ac) Qd=Design Flow(cfs) COEFFICIENTS FOR THE RATIONAL METHOD"Ir"-EQUATION C=Runoff Coe�cient Qf=Full Capacity Flow(cfs) STORM Ar Br Tc=Time of Concentration(min) Vd=Velocity at Design Flow(fps) 2YR 1.58 0.58 1=Intensity at Tc(in/hr) Vf=Velocity at Full Flow(fps) 10YR 2.44 0.64 PRECIP= 3.9 d=Diameter of Pipe(in) s=Slope of pipe(%) 25YR 2.66 0.65 Ar= 2.61 L=Length of Pipe(ft) n=Manning Roughness Coe�cient 50YR 2.75 0.65 Br= 0.63 D=Water Depth at od(in) Tt=Travel Time at Vd(min) 100YR 2.61 0.83 FROM TO A s L d Tc n C SUM A A'C SUM A'C I Qd Qf Qd/Qf D/d D Vf Vd Tt ------ ----- ----- --===- ------ ---------- ------ ------ ------ -------------- ---- -- --- ------ ------ ------ ---- ------ ------ -----� _----- - ------ _ - ------ ------ ------ ------ - ------ __---- --=--- - - ------ ----_� ----- =�__=_ C81 C62 0.76 0.50 186 12 8.3 0.012 0.85 0.76 0.65 0.65 3.19 2.06 2.73 0.756 0.649 7.79 3.48 3.82 0.81 C82 C63 0.57 1.00 11 S 15 7.1 0.012 0.85 1.33 0.48 1.13 2.96 3.34 7.00 0.478 0.487 7.31 5.71 5.68 0.34 C63 C64 0.70 1.00 150 15 7.4 0.012 0.85 2.03 0.60 1.73 2.87 4.96 7.00 0.709 0.622 9.33 5.71 6.20 0.40 CB4 POND 0.94 1.25 32 15 7.9 0.012 0.9 2.97 0.85 2.57 2.78 7.15 7.82 0.914 0.746 11.19 6.38 7.21 0.07 Page 2 GKAL � rT1�s� PRELIMINARY 'm Z' POND STAGE STORAGE WORKSHEET n .� U ? S'G ,I,�� aj+ <�,NG ENGt���� PROJECT NAME: Ribera-Balko Short Plat PROJ#: 7546 LOCATION: Renton,WA DATE: 10/7/2005 CLIENT: Seattle Mortgage (Tom Foster) BY: PAT RE: Raise Pond per Backwater Model for Existing Wetland Discharge DEPTH CELL 1 CELL 2 BOTH CRE1�iENT TOTAL SURFACE STAGE FT FT2 FT2 FT2 VOLUAZE F'I'3 VOLUI�ZE FT3 ID 386.0 1.0 14,985 14,985 14,634 159,617 Top 385.0 1.0 14,283 14,283 14,283 144,983 M� WS 384.0 2.0 14,283 14,283 28,566 130,700 382.0 0.5 14,283 14,283 7,142 102,134 381.5 1.5 14,283 14,283 21,425 94,993 Static 380.0 2.0 14,283 14,283 26,408 73,568 378.0 2.0 12,125 12,125 21,705 47,160 376.0 2.0 9,580 9,580 15,322 25,455 374.0 2.0 1,808 3,934 5,742 8,527 10,133 372.0 1.0 786 1,999 2,785 1,606 1,606 371.0 0.0 427 427 0 0 Bottom 371.0 0 0 0 � � � � YOND SUn�iilZARY � � STATIC�'V.S. EL. = 381.50 WATER QUALITY VOLi1ME 94,993 CF MAX.WATER SURFACE EL. 385.0 DE`I'ENTION VOLUME,- 49,991 CE . _ - - - - .�: ]0/13/2005 Page ] of 1 11S56-pond.xis