Loading...
HomeMy WebLinkAboutDrainage Reports - 04/27/2001PROPERTY of Final A r ved Report ' FORT COLUNS vTtr tames �:zif Date �D / t FINAL DRAINAGE REPORT FOR RAINTREE ANIMAL CLINIC P.D.P. SPRING CREEK DRAINAGE BASIN 1 ' PREPARED FOR RAINTREE ANIMAL CLINIC 1 MARCH 7, 2000 PREPARED BY STEWART & ASSOCIATES ' 103 SOUTH MELDRUM STREET P.O. BOX 429 FORT COLLINS, CO 80522 ' TEL. 970-482-9331 FAX. 970-482-9382 1 1 ' TABLE OF CONTENTS 1-2 Text of Report ,. 3 Vicinity Map 4-10 Storm Water Runoff and Detention Calculations ' 11-12 Senior Center Drainage Table 13-16 Erosion Control Calculations ' 17-19 Extended Detention Calculations Pocket Grading, Drainage & Erosion Control Plan ' 1 1 STEWART&ASSOCIATES ' Consulting Engineers and Surveyors [1 ' March 7, 2000 ' Mr. Basil Hamdan Fort Collins Utilities City of Fort Collins ' P.O. Box 580 Fort Collins, CO 80522-0580 ' Dear Basil, ' The following is the final storm drainage report for the Raintree Animal Clinic P.D.P. situate in the Southeast 1/4 of Section 22, Township 7 North, Range 69 West of the 6th P.M., Fort Collins, Colorado. The site is bounded on the North by Evenstar Court, on the East by South Shields Street, ' on the South by a metes and bounds parcel with a single family residence and on the West by the Fort Collins Senior Center P.U.D. The site is in the Spring Creek Drainage Basin. The site contains 0.36 acres more or less. It slopes from South to North at an approximate slope of 4.3%. The ground cover is existing dryland grass and weeds. The historical drainage condition is to runoff into the South gutter of Evenstar Court and then East to an existing curb inlet on the South side of Evenstar Court, 70 feet West of Shields Street. The inlet discharges North and Northwesterly to Spring Creek. ' The proposed site plan will have the Raintree Animal Clinic and its parking lot. The parking ' lot will have an access from Evenstar Court and an access through the Fort Collins Senior Center P.U.D. to Raintree Drive. ' It is proposed to provide onsite detention in the parking lot and in a grass area at the Southwest corner of the site. The extended detention for water quality will be in the grass area. There will be an area inlet box, with water quality orifice plate, in the extended detention area with ' an overflow grate at elevation 5051.54, which is the highwater line of the extended detention. The area inlet will have a vertical restriction plate in the bottom of the inlet over the 12 inch R.C.P. storm drain which will discharge into the Fort Collins Senior Center existing stormdrain at a new manhole. ' The existing Senior Center drainage system discharges to Spring Creek, West of the Senior Center. The release rate from the detention area is at the two year historic runoff rate from the site, which was calculated by the Rational Method. The detention volume was calculated as the difference ' between the two year historic runoff rate and the 100 year developed runoff rate, using a mass diagram. The release rate is 0.17 cubic feet per second and the required volume of detention for the site is 2,838 cubic feet. The amount of detention provided is 3171 cubic feet to a high water line of ' 5052.75. James H. Stewart ' and Associates, Inc. 103 S. Meldrum Street P.O. Box 429 Ft. Collins, CO 80522 970/482-9331 Fax 970/482-9382 I (Z) I r_ 1 1 1 1 EROSION CONTROL: The site is in the moderate wind erodibility zone and in the high rainfall erodibility zone. A silt fence will be constructed along the North, East and West property lines. Straw bales will be placed at the area inlet after the discharge pipe is constructed for the time interval until the water quality outlet tower and riser pipe are constructed and the gravel filter is placed. The entire site will be disturbed with the grading. The basement foundation will be constructed as soon as the site is graded. A water quality outlet for a dry extended detention basin will be constructed. The storm water runoff calculations, the erosion control calculations, the extended erosion control calculations and the Grading, Drainage and Erosion Control plan are enclosed as a part of this report. This drainage report and the design of the drainage system are in compliance with the City of Fort Collins Storm Drainage Specifications and Criteria. If you have any questions regarding this report, please call. Sincerely, �a Richard A. Rutherford, P.E. & L.S. RAR/meh 502 A No Text I STEWART$,LSSOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: )2.4.2. Date: o,,. 16, iy4y Client: 72, 1.A,eeyIWAnly(lro.0 Sheet No. Hof_ ' Project: gAwr.2E6ylL-C-Ae�.E ANIMAL NDfpITAL Subject: STD F_ Ail 1 /) ATEz R V Al D jF ` 1-E I c -ro ,er r_ 1 1 I 1 1 I 1 1 I I I �- o --iA P- E. a._'cam _ L. _ __ _ _ o T - �Tc, =-1-87-i-1.L13 D Lo)_8 !w I f _ I ___ �►N7_ Q io_y e Z _ -lv: _! 0.{ x 3� i� I—i I i I ' ioo �c�8tivi�•�+tuT _/'yam l_zSX. 0 ZO:X 8.38 X 0''�iv. Dt7S� iFf- I—t H1!_�. _ i — y -� — • � � i � � I � I -� I � L 1 — — 4— 1 I f i I I I STEWART&ASSOCIATES Consulting Engineers and Surveyors 1 1 I 1 1 1 1 L I 1 1 1 1 1 [1 1 1 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: i2. 14 . P_ . Date: Nev, 11 / 949 Client: e, L ,4 e e y M hea- NU ) A J Sheet No. 5- of _ Project: A 1 AJ YP. E E1/ I L. LA ing, F A A/ 1 M A L Ii of P) TA L Subject:�r=1) E_AA 0ArEe. RuAj oFF - 0ye4�oPsj-) 2EA ---0 3-�Aaic.t - L._�SASLN_ A1vD._�._ I +) --—I P E 1e ✓ i o �s_ A 2 E,A _01_Z3 Ac _(a3 ' :`I_% _ !'- + ; 1 + P E ✓-i o v✓ __fti E �— 0.,_I3 . _H c ._ i to :° .. �C = �0.•r3.g x_oas).' +,_�I 3.�►_A OLzo)E.-.r-� — -{ - —� -• Tit_ _/'_.87 �_35,� + II!—%2�.,F7_ ;_}._Io.OM.w,t/._4-miA 1 7 tit i U.1 1 to-E'V z k +0 68 X. 2 5Z_X ;D'3 !o ' D Z G F f l I oim;_ J10_YlaX 4�31-X 1 wb, IpEVl !.Q' 10.ZSX 4 i _ t 1 t Y 7 _ I I � I -- - *-1 17T , ' � � ! I 1 I I I t � i I I I I �� + � � I � -�-•I ( 1 I 1 STEWART&ASSOCIATES 10 S. 933DRFM, FAX ORT 9 COLLINS, CO 80521 Consulting Engineers and Surveyors 82 By: R, A , / . Date: Ale y, /L, 1959 Client: . L 4,eglx A A c A)uro Sheet No. of Project: A i ti -r 1e V! [, c. A& F A Ai, m .a 1 �4 o.r ;2 1 —a z— Subject: ETEkJr1onJ Po"D M A-rr 1Ae vAA /=ea RAcr s T OF T/M6(Mw) .. _ _ .cfc A cFc - V b�UmS TN — .Vo�.un��Ovr,_.;._.D rig 9 /,LSX o 68 x - -_3, 0 B - - .. . lO Z o 4 ZO _. �O LZ,37(o__;_ So 3, z3 I I•.00. 3, olo, p .0 IZ,B(I._ L, r.-7o I — f-- 1 80 _.— t ! _3,.8 o_ + 1p Z o //o ( / -z W7._3, : 00 000 I I I - -- —4,o , N I I I� L ! I I i cj ( I_ o s 16 Zo 30 40 So Go '70 60 90 /oo 110 izo r M E (rot l A/.) r 1 1 I I STEWART9406SOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: R .,4, 2.. Date: F,,,r 25, zoo o Client: D ,e, L A .egY M f4r,N UJo /i Sheet No. Z of _ Project: _ R,� I ,U TR. g�v V /LL.4 G 6 Ay) /4 A L C 4-i AI I c_ Subject: S7-t)2M LUATEr2. Pu.Aja,=r— GALGu1.,47-io.y S.V 3'. BAs/ 1 o ,o r Pa2V/00: _f�12 E_a._ f 7L A� .. � � I D .Zo!) �i0.43_.—,.�' I i I I i 1 i I ' 3 _. _a71 r 4 Q io yR� i Iy (� ro.D. ,5�x...0_94-3—A- CQ,) _S__.x_D . i T , f._--.-.. 1 I n /Ah ':::52.75 = HWL POND ORIFICE SIZING ORIGINAL DESIGN DATA 0.17 = Allowable Des. Release Rate(cfs) NOTE: 1. VERT. PLATES WILL BE PLACED 48.63 = Flowline Orifice Elevation(ft) AT PIPE FLOWLINE 0.65 = Orifice Coefficient (Cd) 4.12 = Avaliable Driving Head(ft) VERT. CIRCULAR PLATE . ....-Outlet Areas qlfinches I : rcuar.radius inches 4.04 ctU HVcleatilic Dn A al I I I� 7I 1 STEWART&O SSOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: 2 . A- ,Q . Date: 1) Client: e. L 4 /2 e- y JW Ar uv r o,-J Sheet No. C _ Project: —AI ti T P E E V I L 1. Ar, F A N /M A- l 14 os pl -r,4 Subject: D is TF AI 7-/a A) V n L- r,� tiI E 11 1 I 1 1 I I I 1 I STEWART&ASSOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: R A 4. Date: / i Client: D e,. L A 2 e �z A A,-, A,Jys a xi Sheet No. Q of Project: A. IAi -re I,=F_ V ILL.4G E A AJ/ M AL 14OrP iT.4 t Subject: O U T L E'T P l PE (; A P A =y A .0 r> A 2 Ea .= A/ LET (' A P.aG , Z:y _ __ JS _ F 2 0 M �_k V TT'E eS -t" O..Jz M !l G�,y 'lV — , f i i 1 �_R t=!} ZN'�ET _IC,_A_P'AC_I<T_ /__%� h G4_=4x_. �-l- { - - ; ? _ T--/_Z__,.2 7L-F_T�SE G_ ! l 91.1 FT— - i G_F_1J.•- — -� �I 1 _ I ' -- I- - i : _ 1 I Y I �... ' ( : ....� J( �..... i 4 71., ! llli - .._D.AAIAJA.6@ -TA ac ef.. Fp,o.K._..__TS__T._.Z uc.-DZ-Aj)VAev F.1,EPoZr TABLE 1. III'DROLOGIC CALCULATION WORKSI(EL•T: DEVELOPED CONDITION OVERLAND OVERLAND GUTTER TRAVEL CUMULATIVE COMPOSITE PLOW OVERLAND GUTTER FLOW TIME Stln DFSIr..N AREA AREA RUNOFF LENGTII SLOPE FLOW SLOPE T_ IIASIN OASIN MINT (Ar) (AC) COEFF (FT) (s) LF.NI'MI fx) IMINI 1 1 0.51 031 0,51 140 1000 NIA NIA am 1.32 1.32 0.65 470 3.11/13 NIA NIA 10.90 ! ! 1.71 1.73 0.72 3" 1.65 NIA I NIA 1 10.72 N 1 4 0.4a 0.49 0.95 NIA NIA NIA NIA In w R : 5 0.3a 0111 0.45 NIA NIA NIA NIA a.09 GUTTER TRAVEL TIME 1 O-CIA SUR DESIGN T. Tr 100•17 t00 YR BASIN BASIN POINT (MINI (MINI (INOIR) (ahl I i NIA 9.09 7.% 2 69 2 2 NIA 10.90 690 7.�0 1 3 1 NIA 10.72 6.90 IO 7r R-I 4 NIA 10.90 6.90 3,91 R 2 S NIA t.09 7.% 3.19 TABLE 2. SUMMARY OF INLET ANALYSIS 100•YR DESIGN CURB/ FLOW PONDINC ALLOWABLE IQO-YR DEPI71REDUCTION T11IF0. CAPACITY INLET INLET T%TE CONDITION (cfa) (n)FACTOR (rfs) SIZE I Area Sum 2.69 1.000 0.9 6.40 1 inlet 2 Curb sump 5.18 1.500 15.00 0.8 12.00 5 0 3 Curb St1mp 10.74 1.000 19.60 0.R 1.5.70 R (t 4 Curb Cum. G(Nit 3.70 0.069 2.78 1 0.9 1 2.22 10 0 TABLE 3. SUABIIARY OF STORM SEIVER PIPE AND DESIGN n-0.012 - LINE DFSCRIPTION SLOPE (R) DESIGN FLOW (cf-a) 19PE SIZE fin) FLOW UEMI (n) FT.Ow VELOCITY (f ) TOTAL NnV FI.OW ENTERING (errs ) TOTAL FLOW LEAVING feral Inlet 03 to M.11. /6 0.5 3.00 15 0.70 3.27 3.00 3.(I0 A(.11. /6 10) 16I.I1. as 0.5 3.00 15 0.70 3.27 3.00 M.11. 05 it, MAI. 04 0.5 I 3.00 IS 0.70 3.27 3.00 M.H. 04 to M.11. 03 0.5 11.06 24 1.16 5.90 8.06 11.06 Inlet /4 to M.11. /3 0.5 4.38 IS 0.91 4.56 4.3R 4.3R M.H. /3 to M.11. R 0.5 IS a4 24 1.80 4.(4 4.3R I5!4 M.H. 12 to M.H. 01 0.5 15.44 24 - 1.90 4.64 15.44 Inlet 11 to M.H. 11 0.5 2.55 IS 0.64 4.05 2.55 2.55 M.H. 01 to Existing F1.11. 11.1 0.5 17.99 24 1.90 6.03 2.55 17.99 Inlet /3 to Esistin M.11, D-I 0.5 3.00 IS 0.85 3.77 3.00 3.00 Exititing M.H. MI to Pn(sl 3.00 20.99 No Text ' CONSTRUCTION SEQUENCE PROJECT: RAzaneGs Vai-AGE Au,.uaLNofp,TAL STANDARD FORM C 5EQUENCE. FOR CZ000 ONLY COMPLETED BY: eAk— DATE: /vote. 1(0,11gyF;,� ' Indicate by use of a bar line or symbols when erosion control measures will be installed. Major modifications to an approved schedule may require submitting a new schedule for approval by the City Engineer. ' Z coo YEAR MONTH ------ - ' OVERLOT GRADING WIND EROSION CONTROL ' Soil Roughing Perimeter Barrier Additional Barriers ' Vegetative Methods Soil Sealant Other ' RAINFALL EROSION CONTROL STRUCTURAL: Sediment Trap/Basin Inlet Filters Straw Barriers ' Silt Fence Barriers Sand Bags Bare Soil Preparation Contour Furrows ' Terracing Asphalt/Concrete Paving Other 1=00AJDAT/0N BA -re MA-rceiAL. VEGETATIVE: Permanent Seed Planting ' Mulching/Sealant Temporary Seed Planting Sod Installation Nettings/Mats/Blankets ' Other ' STRUCTURES INSTALLED BY sl F 19lA4 ------------------- ' VEGETATION/MULCHING CONTRACTOR DATE SUBMITTED ' HDI/SF-C:1989 Ij I I T I T I A Is t o I -----T--------- ---- ---- ----L f I 5 ' ,I I I I I I I I � 5 1 ----------------------------- t i I i i MAINTAINED BY APPROVED BY CITY OF FORT COLLINS ON N ID JAN A_?•i 1991 8-20 DESIGN CRITERIA 1 1 1 1 RAINFALL PERFORMANCE STANDARD EVALUATION -------------------------------------------------------------- PROJECT: )EA► rieE6 VlLL.ALE AA1jMALHD-fPiT44- STANDARD FORM A COMPLETED -------------------------------------------------- BY: R-A.2_ ----------- /V6v.IL,njW ---DATE_ DEVELOPEDIERODIBILITY1 Asb I Lsb I Ssb I Lb I Sb I PS SUBBASIN ZONE (ac) I (ft) I (ro) .l(feet) I (o) (o) fi16FF 1034Ac,1 ZlSrr.I z/SF7. /0'/0 7G-4 Loo—r` -------------------------------------------------- lDI/SF—A 1989 I (1s 1 I� H 11 1 1 EFFECTIVENESS CALCULATIONS PROJECT: Q,4)dlTC66 V /G.LA6@ A V1AM Al. Hvjp i-rAz- STANDARD FORM B COMPLETED BY: gA ,e. DATE: Nov. 1L,1199 Erosion Control C-Factor P-Factor Method Value Value Comment SA2c Soil_ /•0 /,00 0•Z1,Ac. �=OuubATION 0,0/ /,00 O-O$Ac, SreA10 BA16 boo 0.80 .i/LT FC-AJC5 /• 00 O So QAS'6 AA7EAIAL (0 -0(. / 00 0, 0 MAJOR PS SUB AREA BASIN ($) BASIN (Ac) CALCULATIONS TorqL 7G.4% Torac 0.3, Ak. Lo < L°' W-rD. C = 0.21 A /•a + Co. o8A O.oi 0.3 � = 0•sgs WrD P = C-S—ONO.$O = 0.Q-0 /oo o k 7 -7 4- % (16) EROSION CONTROL COST ESTIMATE 1. 356 L.F. of Silt Fence @ $3/Ft. $ 1,068.00 2. Straw Bale at Inlet $ 150. , 3. Base Material 389 S.Y. @ $3 $ 1,167.00 4. Reseed Site 0.36 acres @ $1300/ac $ 468.00 Required escrow is $2385 X 1.5 = 578 u STEWART&ASSOCIATES Consulting Engineers and Surveyors 1 1 1 1 1 1 11 1 1 i [l i i 1 1 1 1 1 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: )p.14R• Date: // _ Client: D,e. LApecyMAr.,yuto,u Sheet No. -7of_ Project: II r41A)T2FEE VILLA6 F fi .UrM A!_ //0J PIT.4L Subject: 1A) AIIEEE— U Ar, I -r�z lf .4 _ , u /, 4 Tin Al f —A 2.E14 D R AruiN� Ta __�_I7cTEnlTro.N P_o.,v� �0._3/p Ac j �__, .-. �-U.No.F.F._.. G_DE_F..F1.Gl�i✓.T--�-.�-0� �6 S � I -- -. � _ ' - j- I ; I W TES C P_ V cuME 3G_Acze Y 0.00 3G._Aci. I i I I.._ A.IURFAACe�— _LEv. 4/T%rl Po Vb'C.V_d,51 V_o it I I I 0 �(.2IS A- I i ._� j 1 61 l I { r 8 f /JI I`� t zz g { I j , FP OM r_ G,_S-�3 ,� l- E. E — F _ Q.—A-tet _ P-15 2OW_.O.F_h�0_LEJ�_/J_0 � I I I I I p7S.lt/. J r I I v_I�cC__ LE-c` o; �%f •tow �O.,I098i, ro_T_ L.- l { LI Es �fo��- —�._I! _, ToO.r--A ► 1 1 I 1 ` I vZ DRAINAGE CRITERIA MANUAL (V. 3) STORMWATER QUALITY MANAGEMENT.. G 3.5 E_xtenc 10-HoL ed De r Draii entior i time Bast (Dry) 3.4 3.3 2L 3.2 Hentic -Hour n Pon Drain Is (W Time Q 3.1 1100 1-1 0 L zffl u 10 20 ' 30 40 so 60 70 8o 90 100 Percent Impervious Area in Tributary Watershed Source:Urbanos, Guo, Tucker (1989) Note: Watershed inches of runoff shall apply to the entire watershed tributary to the BMP Facility. FIGURE 5-1. WATER QUALITY CAPTURE VOLUME (WQCV) 9-1-1992 UDFCD DRAINAGE CRITERIA MANUAL (V. 3) () 9 / STRUCTURAL BMPs t 10. ' 6.0 4.0 2.0 ' 1.0 ' m 0.60 m m0.40 m 7 ' � 0.2 Q m 0.1 3 ' 0.06 ' 0.04 ' 0.0119 ti- 0.01 MINE 10 WAI 0, IJAR FS PA WOCV.2.lacre-feet� or SOLUTION: Required Area� �;J1Jr//4A0f1 ■s NEVINOWMAMPA 0A AJ PAJIAJ ��ll■I AA Oar SAINAEAFEA EMIN11 OZONE AAFAMENNIME1 In F,APJA'p'j 01011011 AC • FT. O.uz 0.04 0.06 1 0.10 0.2.0 0.40 0.60 1.0 2.0 4.0 6.0 O. 07,g 3 Required Area per Row (in 2 ) Source: Douglas County Storm Drainage and Technical Criteria, 1986. ' FIGURE 5-3. WATER QUALITY OUTLET SIZING: DRY EXTENDED DETENTION BASIN WITH A 40-HOUR DRAIN TIME OF THE CAPTURE VOLUME ' 9-1-1992 UDFCD L_________ EX EET BDIIgND I NEW BUIIdNG L------------ N ----� p yOneNow -- - ,...... — ---- c - -�6 sGs4 R _ 3 O _ c s u nc sow ue :I ss - ss 1 ♦ AL _ �. SLIT RI EVENSTAR COURT Ml E. _ a' f 6 L�e<o Y�•3r� 9� pt• It'Mwm. FEW Y 3 BY. SJ X BY E. b.) TIN. 5- 47.85 ss ; j SI TP4� i PROPOSEDBUILDING 6ASFIN. FIR. 53.75 i>• 025N AG ^^ OEf. PONC "wL-mm ;z.'15 . y BSNr. FLR. - 43,44 Y SIAIso IN CIMB e` B �eA9nA= i8; gr]�IJa /G.a"'. K%4-IK:D a 216:6 -- ✓E?gNr `un `wl. au. on p„ r-- � E%IST HOUSE I I 0 O 2 ------------- ��y O a rt. b_xs ______ - --ram-•""` v ,1s _l �y . .., w `mid CI Y 1 y«n a _ _ i }. €k0 s a RAINTREE DRIVEcIII Tj1 �3r- yY �, nI. 1. ��ci4— ago PO>5D *G bF - - - - - - FASW WAJB, POND WI re El _np New SCALE: ,=20' N ao o m a eo GPAPHK SG(E - FE£T 2 AI NAGE TA BCE Ac; IJi c peEA. 3 o. Isar. a xz.Fi .o:sa.., 52 75 = HWL POND N ORIFICE SIZING V�JI 9 ORIGINAL DESIGN DATA /� W 00 AlbwWaD6 RNaYa Rate (Cb) NOTE I VERT PIATES WILL BE PI ACED CI 0 48.M Im PnwlaY CJI EI@EMI Al PIPE FLOWLINE O.SS "6C M "a I.ICE)(N) II. O N VERT, CIRCULAR PLATE cn ya _o.0SwrmuaJlJ_ 19 r r� lU5 ALTIn XylylicOM1118 Xx0(X) Q LVE SQUARE PLATE . �� W I SideI S�0PwvnylncMs) z Arn,YyrY ,c DI Hax(n)- d: ll Z Qz .t I n _ - _.._� .....,. 5 ... ., .. C.,.,.. ....,.... ,.. w U ,z- n sV Z . � .�W. �FIn IA IA+lirl Als �Hlol 49 .-i - I E , u nIlk* L ., VII a y i arr �r a'�i ozn La Pa os.�c 0 Z Z U U z o J ._ ....... rc w L..,,..•—. a <�T&CMI� o ........ ........ III ICII LEI W w ........,. .......... _ _ s...a w Of z_ z City o/ Fort Collins, Colorado 4a UTILITY PLAN APPROVAL i APPROVED: Cfy Enna[, Mfa U CHECKED BY. .. woro. o- wom.ol.. urixb CHECKED BY StA,C"N. UII n DEC, ME mn8ER BATE CHECKED BY von.Y RaT,.ol on we. Ge/oa/o, CHECKED BY 'rvT En9inaa.07M1 SHEET NUMBER CHECKED BY.. 3 GE 4 Dnf.