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Home My WebLink About02933 - Technical Information Report - Drainage T � a � � � � � aT � � Jul`- �6. �ool ��,a.,�H s„ Kavren Kittrick azs.a:,.aaas City of Renton az,34s� r� G 48B C756-: 1055 S. Grady Way 6th Floor Renton, WA 980�5 RE: Liberty Ridge Preliminary Grading and T.E.S.C. Plans— Phase III Sedimentation Pond Calculations Triad Job No. 00-02? Dear Ka}ren: The following calculations have been prepared as a supplement to the Preliminary Storrn Drainage Report dated September l, 2000, and the Preliminary Grading and Temporary Erosion and Sedimentation Control Plans for Phase III dated July 16, 2001, both prepared by Triad Associates. These calculations address the size of the required sedimentation pond for the construction of Phase III. Since the amount of impervious (CN=98) and pervious (:CN=68) area in Phase III is similar to the percentage of impervous and pervious used in Phase I, the same ratio was applied to the total area of Phase III. The area calculation is summarized in the follo�ving table: Phase I Percentage Phase III Area (Ac) Areas of total Areas Total Area 53.11 14.39 Impervious Area (Cn= 98) 23.24 44% .44 (14.39) = 6.33 Pen�ious Area (Cn= 68) 29.87 �6% .56 (14.39) = 8.06 Z�he required size of the sedimentation pond ��as determined as follo��s using the areas sho��n above. e�r��->� �:-;�.�o�a ��c�iv� 3�'t f � �;1�� ._ _v;i t.1i'n'ba:i`��'Y�i��;Ci�' 2 933 Pase 2 Kavren Kittrick Citv of Renton Julv 16. 2001 EROSION/SEDIMENTATION CONTROL DESIGN The sediment retention facility �vas designed using the 1994 updates to the erosion control chapter of the 1990 King County Surface Water Design Manual (KCSWDM). In accordance with Section 5.4.5.2, a sediment pond was sized as detailed below. The required surface area of the facility was computed using an inflo��- rate equal to the 2-j-ear, 24-hour peak rate of runoff from the developed tributary area. Sediment Pond Tributary Area= 14.39 Ac. Pervious Area = 8.06 Ac. @ CN=68 (grass) Impervious Area = 6.33 Ac. @ CN=98 Time of Concentration= 10.00 minutes (assumed) Erosion Control Hvdro ra h Rainfall Type User 1 Time of Conc. 10.00 min. Baseflows 0.00 cfs Total Area 14.39 Ac Abstraction Coeff. 0.20 Pervious Area 8.06 Ac (c� CN=68 Time Interval 10.00 min. Impervious Area 6.33 Ac �i! CN=98 Erosion Control Hydro ra h Summarv Precip. Peak Flow Volume Time of Peak Storm [in] [cfs] [Ac-ft] [min.] 2-Year 2.00 2.87 1.07 470 Required Surface Area Required Surface Area = 2 � (Q�,�,'0.00096) Required Surface Area = 2 x (2.87,'0.00096) Required Surface Area = 2,989 ft` Pa�'� � Kavren Kittrick City of Renton Julv 16,?001 Summan� An existing pond with a surface area of appro�imately 130,000 square feet will be utilized for sediment control.The overflow from this pond will be set at 10 feet above the pond bottom, providing approximately 1,121,000 cubic feet of total storage. Sincerelv. TRIAD ASSO ; � William J. Goggin. PE Senior Engineer VdG'sb Enclosures 7/16/O1 LIBERTY RIDGE,PHASE III—PIPE SIZING CALCULATIONS The storm conveyance for Liberty Ridge, Phase III flows from in one direction. The high point of the basin occurs at the south east boundry. Flow from this point is directed north east. The runoff model created to size the pipe conveyance in Phase III «rere called PH3, the entire flow was modeled in four sub-models called PH3-1, PH3-2, PH3-3 and PH3-4. The main pipe system is modeled inPH3-1, resultant water surface elevations in corresponding catch basins were used as tailwater elevations for the branching models(PH3-2, PH3-3, and PH3-4). The storm water flow from all of Phase III enters pond "C" at the outfall 401A. PH3-2 enters the main storm conveyance system at CB 416. PH3-3 enters at CB 301 and PH3-4 enters at CB 402.The main storm conveyance system (PH3-1) was sized first and the water surface elvations computed «�ere each of the other models enter the main system. The flows used at each of these junctions were determined using the relative area of each basin. The total basin is 37.08 Ac with a resultant 100-year flow of 19.1. The flow contributed at each node in PH3-1 was determined using the King County Q-ratio method. A copy of the computer q-ratios is included �vith this calculation. The amount of flow and the tailwater elevations used for each of the models is summarized in the following table. The resultant backwater output is also included with this report. ' � Flow (cfs) Tailwater Comments �� Q-100 (Elevation) ', PH3-1 19.1 251.00 Pond C ' PH3-2 3.21 265.88 CB �16 ��' PH3-3 0.58 268.05 CB 301 , PH3-4 5.19 255.03 CB 402 � Summary of Back�i�ater Modelina Parameters �i Page 1 of 2 7/16/O 1 By inspection model PH3-3 «-as not actually run because �i-ater surface was not an issue with this pipe system. Using the above referenced flows and tailwater elevations the pipe system was sized using the King County Backwater program. The out put for the pipe_conveyance models are included at the end of this summary. -James A. Morin, PE �' I, Page 2 of 2 �,� �, � ��< � � ,,�� , �� o�' � I ' ` .. . . . � . � `y� `� +�x, . �� ,��.. . �. � - , 1 � I \� �a, ' . t/� ',*�� . �� - / ��A��iu�$ �i i.. �j._ . �� , '' � T' __ `� �` � � ' � :,.. 'i .6��// _--`' ,'r.� 1' �t�. �' r� �� Rort�cl Yen�[ � ,` ll ,. �4 � � � b �,,wy . � � �.�#.. N : B�G�v,rioz � . � 9.3-+, �� `f �h�3'S�'C. 1� / � ^'' �noeSa.v.ne� Z' `� �' 'n'� :%' ...i I � � � ' �� .a r.r�:� � t < . t -0' �.'i �"'ti.�s- �:.. � ��c .. 9��\.�� f., ��.� p�� I.eLuPe r;h;i�:�: � '�'� �,� � � J / / Ste Rs� , � � . � /� 1 �� '"� /�`-: � ••.ti F�� , � �¢ � .,�� 11�I1 1116 ba I� b�L{�l�l�IG1 1 I �"' /��.:��_.,g��.. , �`^e. '�+'./! � �j�.� � ��:_ � /�/ �`�,�. Ti h�IIO�MD/N wcM�i�eefa .1' { � ./ / _ � �!:/ � � ` +. I f. .3rt: . , ' �` �. •',�'� 3�y` � r 4i �� i/ ; � �F " 2 F, / � / , ' y ` C�.\'� � ' > ' '�l� " `j < k' ' o .:I� ..ti: v �� %( . J. ti' - i� '� I � ' f. � � ' k- �: i /�1 �_� �� -F`.E � :�i' (� ` V � �� r ° ! '"`• - s� . _, � �Y ,r � �� 2 �� ' ' �r f`�� _ ,. , � <. ..„v s{ �y ¢{ y �, , t I� . .''Y . .^l . . 4�q. �F�:'. . �� .�� .. � j�ALE _ ,�'� ��,. ', '�' ``, �6��^ —_ } _ --- _,�.�;;: �'� , ;�� , �' ,! 3 ` `l ,� �� ,�`� ��-� �.'� �� "�--- '� ��"� � � �l .. � _F `�< > 31 � . } .� �', / � , �„41„� ', � ; � r�� . f .. �:ti��..4 H' ,� "ti, �t� � pJ i: t . ,�"y�� I��' � ?�y` .- . r � 3 YI I I i . A. �Y.ti � • l O � i� �: 'Y�� . �My, y « 1t ' �� - "- p . �/` �l}''�A � I � _��`� � '� �� ~�,...`� 4� F=�/ 4` :(: � - �'�',y,M�'h ' � � ` � I 7 \ ' �� f 6. R 4 �6 N 4� \ � • -M� � ,.{�I�✓ , � r,4� . . . '�'�, , . _, .t = �,,,• �•�i i > •L n � ' �jn>-�.; ' ' ` ! ; � �,` �i7� � �.:... W � . �4 : T « ' `h � :� . � �, �,..�� ' >, � � � � 1 ; � ,;2\, k � � � , . � TOTAL AREA 37.OB AC — .,..; � ��.f � . 2.86 ; t � , � : :.; , : � ;, �. - 4 ... ,:. �...- f,v�`�.. = 41, a; I ; � `'� '�i i;'; _--- �,-� �,� c��- Z Q ; N ;�„- ,� � pp� , „ , . , , , , � t — ••ti� _ ��C� _ "`` t`� �+ '� � . � "Riy�411�' 1 11 ' ' ; 1 14 1�\�� \��``� \\ (i/ `�`\1�/I I ., , ~S Ar�T..�..ni�'-r .; �t'� N 4 �? � It �Y `;��wS ��+�N � .�,d.��ti! � I { � � �� `�\�``.. li �� ll i�� ..P �} 3'r,`0.: • �� (/� � � -�, .. I' _... .: �,�. :� -� ,.�.Wey _„_- - �.. r I `��i � �� ::1 \ i} iil�Yilid i �'Y '.'..: .�' i ...: .. .< ' : �?'�;hti :.:.-..- ��,.• .i.' -�4 � L�' i \ i �i�� - �� i��1;i�i��'�'i\ii e� >�:�' ......�� -} � � . � . :.: .: v . - _ ,-�_ . . i�-+�' .�:,��` -i 1 . � �.. .. . : .., � i.nr:,..<, , _ { " - =' ___, i' .. ,-.�- �- ri. �--. '•. . '. ,. �.. _ -.�: ' . _ _ . .- � � . ' c . ... .... . ' ' � � � i . -_ . - . . . . . . � _ '...-. f�. ' . . �yp�l>Pw::'... . ��,.'-r. � �"y ��i'�' . . ;} �` .. :.: . : w.,.>„� y. _. - _�, ... . . ,:, ..,,! —� ' ,� � : . . . ;,. :.: > - . . - ___ � . � .. _ .... . y . ; . . ., _.. . ::2 :r..'�� - _ . r t � � _ � � � A ` � �1 4'' � .. • . - - � �05� � _-_ '_ � � , . -. J�� ;. .. . . . .� �� .;.:, ... . . ,. . . . , � i i � � � n ` ; ..�..:.� �. .�. . .-......, ¢. ;. 3 :. . . . _ = . - . - . � , . , ... r . � . , _- - , __ .,... . �. . �� .. , .. ,�- ; - � , _ . . ., _- : w..l �s:� �.; � , .: v: � � - :+ -� . .. _ ; . , . , . . .. .. ,. , , . .. p . • . .. _. . ,. __ . ,, _. _ . _ .. . �_ : :•,,. .� . : . .— . . �` • ; �.... - �_ , ; : ��.. , ,. , . . j ; „� . �.. ,,,::.. . ,. - __ � ;. ._ .; , , , . :,,,.� .:.;..... . ,. . w < � ,- � : • , ;: . ` >� _, _ - ' — . , _-4 r t � > �� ,' i i ^ � ,� � W — . _ • . , la _ z _ __ C ........ .� _ - ` _ - ` ra. ',. k '>� F. ',� i`� . � , � \� . -__- � _ GC . . .. � .. .. :.. -,: +c .. .. . . �___{ . ;, -....-.. `, _ �""� i. �5:� o :z ye{:_? -......� _ -e ,: a� � , .\-� -_ , - ..._ _-_ _ _' . , � � ( :F--- :': '. �� . �:'::`.:'i ;�.._ ..,. -:f =_=-_'I--'--.y�'-{,__}� --- _t,_� =_' __ _ - ' . .. 1 \ . � � � c .., \ �� - _ � � � ` i . . : . . •. ' - � � ' l ,_, .. . .. „ , _ _ _, .. . . _ ,. _ . . , ._. . . _ ,.�...,. . ,;' A,v_� . - -- / - — , ��..� ; � \� , � .,,�,;.� - / . �� , i�� . �_ .. . . r.. .�- - >.. . ` ; j � . . . . ; � , { :r,.:� ; � - - \S .A'n .' �`� ; �' �. �� : �'1� � ( _�_ ,_ i��s � (� _ , �� — . � 1 1 3 = � ----- I � '�' - s ; .. .. . � r,�+ .: ` _ r.. _ ;� ;,; - _-c� s � �� • , w # • - f- , : _ t� 4 ;�, �f� : � • j�, �.. ...... � . 0.18 '; -" � _ , _ � • _ - � � ' _ I 1 �_.Z _ �;. � �.....� ,� � 0.52 B7 � \ � _ - � - !; i �� , j,° � i i � ,,,, ,� � �' _ ;•, _ - -- � ii � . � � ,yr ,�+� b� ` F S05 0.27 - l ____- � I � f . � � �'� = _'f<�...� '"�" �,s� ,�"3 , - . - , __ ,!i �� ri',''I� '� 1 IY , �� sE. 0.2 • � . ��,, , � } . ,,f' „ 'y �� ; , §I 1 its - ,b "� � _� �✓� 1, � �� •\ \ �„ �, �-�,_ ,,-i� ni�I i f �ro.il� � � � '' •I 0.39 � J«� � - �\ ` ,i I' � _ — �'_ ,' - ' 1;n rf . . . � �: � . . ;� \ _ , ,, , � ,�4 � `- �„`< i� � � ��,�� z, -_- t.� ,,=; � �,�+, � . :� `e'� : . �'` `� � i '' i� „V- . :�� ::.. -� r, . � �s,- ..� d i : .� y � < . `r . 4 < : . .�: i ,, - . ��,, �` �; , ,, ,- ;. .-�,-; y,,;� I � :. " ' _.�� aR�.a J` .. ��/`� ' ��\� �v` �� . '�I 'Y � . .`. i '. �� .. � �*"`"'�.J� �7e� � 0.��4/ �.S f .� I ` i;, '.� ,Il'/ ?....�� .,' % ' 2 .25 , ,, ,, aa ,, ; �. .., 307 �/�� . � � .• , � � � {� '�' .� - j � h- .4_�.<::.,.. ,� .. c � .. �..� � �' 1�' � I� ��_�,a� -�"- �j i,/ - . .�' ' . �- � � � _ . . I �il 4 , ;�� ; - -V _ ;� ;,,ya� � � .. . -X_ Y .� —__ � � �� - , .j; .. f-"'rr�r� _' _- r__ t ` �� - Nf � i �I � ,� .i%_- " 1 .. � ... .f� � v '� � _ - . ,/�, �� ..�,! /'.' 0.�8 i � fz/� y ' - ' , �T"�—�E'`J� _ -- �# __ \��.702/f�` _ il ii�� i -_ :=i= . Y/dA6! . � '� /T.��; �-- „� ,, � �� ', ii , • ��y -. , .. , , � • ',� �� %llP .+ r- ^ 0.�J I �, . � _ _� `I _ � , �a . . . _ ; . ,d, , �� ,s � -;,,. -_ a I - ,9� . , ,� �.1 -� � , , ; ' ..: . ,. .t �'�. �" . �,� i ' __' ' . i i {i{ - ' _ t. � I r � � � ��- r:��'� ��--- -,, � y , I�'�=� - , �-"-;J _ �� .,.1 , �, . � ; , -,;. ,. - -- � . ``aF:`. r.�� _. - �� r - . �.. _=�'iJl, „�� ' - � - � � �,�1 ti - '� �� 'i a_ o - -� _ � ��--,: _ ��;;;r„ �^� ,.- � �,3- ,�: i ,•,,. I��i; �� '� �� ' ` ,� scu� � ,�.: �� ,:� ' '_-_ "��'1:' ��', a;- - , __ =�—�----6—� ==_ ----�\ � ' '�, ��--— �„ - .70 _� ' �k _,' �:;��. „ ��- _�� : '��__ i , ___ , ' � ��i:i\` .�:i s/�y ��t ��l 1 � Jr..3 i .8 f ' \ � . `�� - �i:�v � i 1 �� ,�� ` _-- - '- �` .,� , � �� „ � � � _ � �' „�. - , ,,., �� I � �l _, ,,,;,.. r ;,; , i :1 - —� _ �,. I ' {, `�� , � � ��. - �r=- -, . / �! i I 1 :'• �li ,�a� ��1� 1,�,,�%�" �_ =7/ , 1\�� "' ` i��'� ' `�' �ti�ro�, TOTAL AREA 37.08 AC I -- --� I� , 1 � � � � r'fo�..�. ... \•` � � I ii�b i ' _ e e�1 _ �� , � � � 1 �I �x° '' I _ i � m ,..,k. � . ;.'�—�_ ,� I� ..J . .,�. � _ � -'_�-� . i - I -f � (( i ��.. . . \ 9I6YP NOS�Al]D „ � ; � ONI�S�'d�W�ll� I� 1 , " � ' �� '-/ � /�/� ,. ___.. 1 . � ' � , � . mB NOI�t OO�OLL I`_ �, . � . . . � .- --- i �1 N01� �Or� ps000 na�o�ssoa�, Total Contributing Upstream Q-ratio Desc. Area (AC) Area 1.76 0.00 0.00 CB 309 0.35 1.76 0.20 CB 308A 0.23 2.11 0.11 CB 308 0.52 2.34 0.22 CB 305 0.21 2.86 0.07 CB 304 1.65 3.07 0.54 CB 301 0.18 4.72 0.04 CB 421 0.77 4.90 0.16 CB 419 6.94 5.67 1.22 CB 416 0.60 12.61 0.05 CB 414 8.29 13.21 0.63 CB 413 1.25 21.50 0.06 CB 411 1.21 22.75 0.05 CB 407 0.18 23.96 0.01 CB 406 0.00 24.14 0.00 CB 402 10.08 24.14 0.42 CB 401 0.00 34.22 0.00 Pond C F^=--1CS�.do� BACrCWATER COMPUTER PROGRAM FOR F'I=�� Pipe data from file:ph3-l.b�::c Surcharge condition at interr�_�c--ate �r_��-_-��r.s Tailwater Elevatio�:251. feet Discharge Range: 19.1 to 19. 1 S�ep cf 1 . [c�s.] Overflow Elevation:281.18 fe�% Weir:NONE Upstream Velocity:0. feet/se� PIPE N0. 1: 154 LF - 36"CP @ 1. 68° OUT�ET: 246. 60 INLET: 249. 18 INTYF': � JUNC N0. 1: OVERFLOW-EL: 261.30 BEND: 0 DEG DIA/WIDTH: 6.0 Q-RATIO: 0 . :,0 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO F?��= �******�********************�****��***********+*��*�***********************�� _� 19. 10 2 . 1� 251. 32 * O. C12 _. 4- 0. 92 4 . 40 9 . =0 1 . �3 2. 14 1 . 88 FIF� P�]C. _ . _9 L� - 35' �F �3 1. �0� ;UTL�. �5� . F3 �rILE�'. �5�. -_ =_:I'_'�'. 5 �liNC N0. 2: OVr.,RFLCW-EL: 2�9.47 BEND: 45 DEG DIA/WIDTH: 6.0 Q-Ri�TIO: � . __ Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO H"��1i � *********************�***********�******�**********************�*****+*****�� 19. 10 1. 91 255.03 * 0.012 1.91 1.06 0.00 1.06 1.41 ***** 1. :_ PIPE N0. 3: 64 LF - 24"CP @ 2.00° OUTLET: 254 . 62 INLET: 255. 90 INTYF: JUNC N0. 3: OVERFLOW-EL: 260. 17 BEND: 90 DEG DIA/WIDTH: 2.5 Q-RATIO: C . Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO Fi:: ****+********+**+**+***�*********��******�*+*****************+***+�*******� , . . �7UN�.. id�J. '� : J`V�R.F�I,�°�-"_i�: �bl. i 4 FSF,I`]Ci: LU C;"l� D1L:%Vul..'TI:: L .U �/-F��IU: Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO *********************+*******��************�**************�*********�*****� . �3.45 1.80 259.17 * 0.012 1.33 0.87 1. 90 1. 90 1.33 ***** L . PIPE N0. 5: 208 LF - 24"CP @ 1.05% OUTLET: 257.37 INLET: 259. 56 INTYP: JUNC N0. 5: OVERFLOW-EL: 265. 96 BEND: 0 DEG DIA/WIDTH: 2.0 Q-RATIO: 0.:; Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *****�*******�****�**********�*******�**�*************��*********�************* 13.32 1 .32 260.88 * 0.012 1.32 1.09 1.80 1.80 1.32 ***** 1.21 PIPE NO. 6: 11� LF - 18"CP @ 0.50° OUTLET: 259.56 INLET: 260. 15 INTYP: 5 JUNC N0. 6: OVERFLOW-EL: 264 .03 BEND: 0 DEG DIA/WIDTH: 3.0 Q-RATIO: 0.06 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ********�*********+***�**++��*�**�***�*�*****��*******�***��***��*�*�********** 12. 68 2.76 262.91 * 0.012 1.35 1.50 1.32 1.35 2.22 2.76 2. 39 Page 1 F:3-11C0.dcc FIF� b;C. . ��5 L� - -=�"CF �� . CO% OUTLET: 260. 15 INLET: 261.25 INTYP: 5 �JidC N0. �. 0`JERFLOPi-�L: 2'04 .79 BEND: 0 DEG DIA/WIDTH: 2.0 Q-RATIO: 0.63 Q(CFS) HW{FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ,�*+*��*�*+ �***��*�*��*+,�***��,.�*+*t+**�*x�*,��,�� ,.*�x��**+**�,�*��*+*�*******x�* _1. � ' �. 1�3 _, _ . �3 ' l . Jl� 1 . 3� l, . 0 �. . o G .�r� �. � � . __ � . r�r FIF� N0. �3 : 47 LF - �b"C? @ 1. 00', OU'IL�T: 261.25 IPI�E7: 261.?2 �`�TrP: 5 JUNC N0. 8: OVERFLOW-EL: 265.36 BEND: 0 DEG DIA/WIDTH: 2.0 Q-RATIO: 0.05 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI **�****��*�***�*��*****�*****��**�**�**�+*��*�**��**�******************�******* 7.34 3.08 264.80 * 0.012 1.05 0.88 3.18 3.18 2. 91 3. 08 1.46 PIPE N0. 9: 186 LF - 18"CP @ 0.50° OUTLET: 261. 72 INLET: 262. 65 INTYP: 5 JUNC N0. 9: OVERFLOW-EL: 268.18 BEND: 75 DEG DIA/WIDTH: 2.0 Q-RATIO: 1.22 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI �********************************�*****************************+****+********** 6. 99 3.23 265. 88 * 0.0=2 1.03 1.09 3.0� 3. �� 2.�6 3.23 = . 64 P-PE N0. 10: 68 LF - 12"CF Ca 1.09= O�TLEi: 262.50 =�LET: 2E3.24 INiYP: 5 JUNC N0.10: OVERFLOW-EL: 268.96 BEND: 95 DEG DIA/WIDTH: 4.0 Q-RATIO: 0. 16 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ************************�************+****�**********+*******************�***** 3. '�5 3. �7 266. 61 * 0. 012 �.?? 0. 67 3. 38 3.38 3. 09 3. s� 1 .21 ?IPE '�0. 11 : 81 L= - �2"CP @ 0. 5=� C�JTL=T: 263.24 T1�]'�RT: 263. 05 ItdT=P: � JUNC N0. 11 : OVERFLOW-�L: 270. 17 BEND: 30 CEG DIA/WIDTH: 4 . 0 Q-RATIO: 0.04 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ****+�+�*�*+*********�*�+�***��**��***********�***�*******+**�**�**+**�***** 2 .;'1 3. 5< <6�' . 1, � C .G1� 0.�1 , . g1 � . 3�' 3. �� 3 .3, 3.52 � . 02 FIFE N0. i2: 146 LF - 12"CF @ G.SC': OUi�E�: 26�. 6� IP�LET: 264 .3� IPd�YP: 5 ��NC N0. 12: OVERFLOW-EL: 273. 80 BEND: 5 DEG DIA/WIDTH: 9 .0 Q-RATIO: 0.54 Q;CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI r��x********************************+*******************************�********+* � . b- 3. 6, �c8 .0= * �i• '=-2 0. �'n r. -° 3.�_ 3 . 52 3. 40 ? . 5� 1 . ,, , _-�E I�;��;. 13: -5� -,_ - 1r"'��F �3 U. 50�� ;UTL-T: 2n9 .��I II'�LE�: 2i=� . =4 IP�1T�'_P: � JU\C N0. l.s: QJERFLO�n-EJ: 2 l2, i5 BEIdD: 5 CLG DI[j/WIDTH: 4 .� Q-�TIO: 0.0; Q(CFS) HW(FT) HW ELEV. * N-FrC DC DN TW DO DE HWO HWI �� x�+�� :�++****�**�***********�*********************+********�****+**�**�*** 1 . -:', 3 .26 268.40 * 0.012 0.56 0.58 3.67 3.67 3.21 3.26 0.76 F'IFE Cd��. -4 : 57 LF - 12"CP @ 0.49° OUTLET: 265. 19 INLET: 265.42 INTYP: 5 JDNC N0. 14 : 0'�'�RFL06^I-EL: 2?1.?C BEND: 5 DEG DIA/WIDTH: 4 .0 Q-RATIO: 0.22 ?age 2 Ph3-1100.doc ; Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *�***+******��*******�*******************��**************�*�******************* 1.58 3. 14 268.56 * 0.012 0.54 0.55 3.26 3.26 3.08 3. 14 0.75 ' PIPE N0. 15: 54 LF - 12"CP @ 3. 96$ OUTLET: 265.42 INLET: 267.56 INTYP: 5 JUNC N0. 15: OVERFLOW-EL: 274.85 BEND: 5 DEG DIA/WIDTH: 2.0 Q-RATIO: 0. 11 I Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *******************+*************�*******************�********�*****��****�***� 1.30 1.10 268.66 * 0.012 0.49 0.28 3. 14 3. 14 1.07 1.10 0. 65 PIPE N0. 16: 90 LF - 12"CP @ 3.96� OUTLET: 267.56 INLET: 271. 12 INTYP: 5 JUNC N0. 16: OVERFLOW-EL: 272.06 BEND: 45 DEG DIA/WIDTH: 3.0 Q-RATIO: 0.20 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *�****�********�**�*****��**�***�*�***�**�**��*�**�***+**�********************* 1.17 0. 62 271.74 * 0.012 0.46 0.27 1.10 1.10 0.96 ***** 0. 62 PIPE N0.17: 142 LF - 12"CP @ 9.18o OUTLET: 271. 12 INLET: 277.06 INTYP: 5 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *****************************+****************�******�***********��********�*** 0. 97 0.56 277.62 * 0.012 0.42 0.24 0. 62 0.62 0.42 ***** 0.56 Page 3 BACKWATER CCMPUTER PROGRAh] �03 F=PES Pipe data from file:ph3-2.bwp Surcharge condition at intermediate junctions Tailwater Elevation:265.88 feet Discharge Range:3.21 to 3.21 Step of 1. [cfs] Overflow Elevation:277.93 feet Weir:NONE Upstream Velocity:0. feet/sec PIPE NO. 1: 167 LF - 12"CP @ 2. 41% OUTLET: 262. 90 INLET: 266. 93 INTYP: 5 JUNC NO. 1: OVERFLOW-EL: 271.38 BEND: 0 DEG DIA/WIDTH: 3.0 Q-RATIO: 0. 16 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ********************�*******�************�********************+*******�******** 3.21 1. 16 268.09 * 0.012 0.77 0.53 2. 98 2. 98 0.77 ***** 1. 16 PIPE NO. 2: 180 LF - 12"CP @ 3.54� OUTLET: 266. 93 INLET: 273.30 INTYP: 5 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI ********�************�*********�*******�*******�***********�***�*********�***** 2.77 1. 15 274.45 * 0.012 0.72 0.93 1. 16 1. 16 0.72 ***** 1. 15 F�r,�-�ioo. �o� BACKWATER COMPOTER PROGRAM FOR PIPE'� Pipe data from file:ph3-4.b�•�p Surcharge condition at interT��iate jLn��i��,s Tailwater Elevation:255.03 feet Discharge Range:5. 19 to 5. 19 �t�� ot "� . �s] Overflow Elevation:260.04 � -_ Weir:'��]OT?= Upstream Velocit; : . _ PIPE N0. 1: 19 LF - 12".�F � � . �_ ��TL��: �� . i� IidLEi: ��v . �� I[dii�: JUNC N0. 1: OVERFLOW-EL: 259.94 BEND: 90 DEG DIA/WIDTH: 4.0 Q-RATIO: O.0 Q(CFS) HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI �*�*�**********+***********�***��**�*��*�**+*********�*�**�*��**�*�**�**�*�** 5.19 2.62 257.04 * 0.012 0. 93 0. 92 0.91 0. 92 0.93 ***** 2. 62 PIPE NO. 2: 75 LF - 12"CP @ 1.490 OUTLET: 254 .42 INLET: 255.54 INTYP: 5 JUNC N0. 2: OVERFLOW-EL: 260.09 BEND: 15 DEG DIA/WIDTH: 4 .0 Q-RATIO: 0. 12 Q(CFS) HW{FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *********�*�******+**********�***************�**�************�***************�* 5. 19 3.43 258. 97 * 0.012 0. 93 1.00 2.62 2.62 2.85 3.43 1. 95 PIPE NO. 3: 10 LF - 12"CP @ 2.00o OUTLET: 255.54 INLET: 255.74 INTYP: 5 Q(CFS} HW(FT) HW ELEV. * N-FAC DC DN TW DO DE HWO HWI *********�*******************�******�*******�*�*�**�*+*******�***�*****�*��*�** 4. 63 4 .18 259. 92 * 0.012 0.90 0.71 3.43 3.43 3.37 4 .18 2.05