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HomeMy WebLinkAboutDrainage Reports - 04/27/19981 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Final Reprt PROPERTY OF Date FINAL DRAINAGE REPORT FOR SAFEWAY ROCKY MOUNTAIN FEDERAL CREDIT UNION OLD TOWN BASIN LS k�17 LS_Ll D h 1 APR 1 31998 PREPARED FOR FINANCIAL CONSTRUCTION SERVICES APRIL 10, 1998 PREPARED BY STEWART & ASSOCIATES, INC. 103 SOUTH MELDRUM STREET FORT COLLINS, COLORADO 80521 970/482-9331 STEWART&ASSOC[ATES Consulting Engineers and Surveyors April 10, 1998 I Mr. Basil Hamdan Storm Water Utility City of Fort Collins P.O. Box 580 Fort Collins, CO 80522 Dear Basil, This is regarding the stormwater runoff for Lot 1, Boston Chicken At Lemay And Pennock, P.U.D. The existing restaurant building at 900 South Lemay Avenue is being remodeled as a bank building for Safeway Credit Union. A future expansion of the building to the East is planned and four drive -up lanes are also planned. The new site plan will have 976 square feet ofpervious ' area changed to impervious area and 2,686 square feet of impervious area changed to pervious area, resulting in a total increase of pervious area of 1,710 square feet. Part of the detention area in the parking lot will be regraded for the four drive -up lanes which will reduce the volume of the existing detention pond by 1,690 cubic feet. The required detention volume is 17,445 cubic feet and the revised volume provided is 23,359 cubic feet. The existing detention pond in the open space North of the building will not be revised. ' The existing storm drain pipes will not be altered by this change in use. There will be disturbance of the existing surfacing where the future addition will be ' constructed and where the drive -up lanes will be constructed and where the parking spaces will be eliminated. A gravel filter will be constructed around the North inlet of the parking lot detention area during construction and a straw bale dike will be constructed at the outlet of the open space ' detention pond to control erosion. A copy of the approved drainage plan and report are enclosed with the revised report, and ' revised grading and drainage plan. A part of the existing drainage easement over the East 80.00 feet of Lot 1 is being requested ' to be vacated in order to allow the construction of the drive -up facility. This drainage report and the re -design of the drainage system are in compliance with City of Fort Collins Storm Drainage specifications and criteria. If you have questions regarding this ' revised report, please call. Sincerely, ' r:5028 . .StfAF. Richar; A Ruth rford,P.E. LSmeh t 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 STEWART&kSSOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: —1;0el Date: Sheet No. _ of_ Subject: FM i T — _ ! = %ZOSv C�a� N ��d�r� D• 2 ' 'a O, y5: _ ✓` J 7 .7-'� ASPHALT DRIva _ /08'.x /7 = _l._8 3 (o S•f ..c AAfe fmom .0.95 t'o O. Z X/G = .5n5,0SF G'�n�f�r��ryY. D gJ`�ia Z ZOD- `/o�/ai�z SF 9 7 (a� LNCK.EASE. OF PE2vi00$ 4 9eA — G=O.zo r-ROM C-0.9s �r'isT/.via' i7/ !•ram 3 Z 4-8 _ 5� 7G1411.... 1 r 1 1 1 1 1 STEWART& SSOCIATES 103 S. PH 482-93 DRF X 482 g COLLINS, CO 80521 Consulting Engineers and Surveyors By: =lSa-/Date: . Client: Sheet No. -Z-of Project: Subject: 1 � EE �SNEET 3 Fo>`. VOLVMES I 1 I I 3 ' DETEWION POND HIGH WATER LINE I I 0 I H I 1 1 VOL. = 1/3 (AREA ABOVE) (DIFFERENCE IN COUNTOUR ELEV.) 2. FOR THE REMAIMDER OF THE VOLUMES BETWEEN CONTOURS (SECTION 9.2) VOL. = DEPTH/3 (A +(AB) ^ .5 + B) FOR: Uniform Sides sec.(9.2) 3. HWL=(VOL.REQ.—VOL.LOW CUML)*3/(AREA LOW+AREA HIGH+(low area*high area) ^ .5) 58.17 = HWL'POND I I I I I H I 11 I I I I I I d I I 11 STEWAU&kSSOCIATES Consulting Engineers and Surveyors 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 BY: 2 AA, Date: Alo,1.14- 1997 Client: r-lAlAA1�zAl SheetNo. _of_ Project: A r� tA,, A:V e n.-,&,. Mn uA.,-r A /A/ FA--nr--p-A1- (-jecp/z Subject: 6izo,finA) Ce)A)-rpp1- Cos7- E's-rIMAT= J A' 745 -A IV A AIFE v -T -'A Z 7 -MrA))MUAi SE,cuel-ry D 6 F>10s, T 4­� L I 1-7, Z tA T744- U. K _3 -74 -,Fri v YIN w WA 4 Lj pq vao IV S'a NN Ri ilk 41 g{� Tin". Fu 1. RZ f A r Z I MAIN ;,1! MAP ?13-� i4 . Jt 14 YW(iJ4 �VA �d,��"Y'��1h� �NY9 (; i �nf s :� Vrl 41 1;4 JA; 0, !f 1,14 19-kt.&'%:,.p IT, ZY Us. �ttv Ak. �1111 It It WW- lY_ IF I' IN J ..1 try Ki. i rk" 11-Z fi P jii�R i 4N, �i 1px xt r; v2z: Jf 'CA ON tAll h rs34. 1 I j 4oIy t 5:.4 IV I K)P$t% '. b 6j iTg ttlA. "L"'A6, i R5 %041 Lot, Ai IR Al ' :+v .N I A. 4rri., -4C. W4 tFr -"'�yjk„lnC oAl iC a rJ RA I• V.ki 0k0 :ow-. vw, Aw am rmw � 10a+e DRAINAGE AND EROSION CONTROL REPORT FOR BOSTON CHICKEN ' AT LEMAY AND PENNOCK P.U.D. 1 1 ■_ PREPARED ' FOR ZTI GROUP 1 ' MARCH 14, 1994 1 ' STEWART & ASSOCIATES, INC. 103 SOUTH MELDRUM STREET ' FORT COLLINS, COLORADO 80521 303/482-9331 1 1 1 1 1 1 VICINITY MAP I PRELIMINARY DRAINAGE AND EROSION CONTROL REPORT FOR ' BOSTON CHICKEN LEMAY AND PENNOCK P.U.D. ' EXISTING SITE: This proposed site is located in the Northwest '—, of Section 18, Township 7 North, Range 68 West of the Sixth P.M., Fort Collins, Larimer County, ' Colorado. The site is bounded on the west by South Lemay Avenue, on the north by the Lemay Animal Clinic and the Robinson Press building, on the east by ' medical office buildings, and on the south by a medical office building and by a restaurant (Godfathers Pizza). The net site area is 2.0 acres. The gross site area which includes the East 'Iz of South Lemay Avenue is 2.4 acres. ' The proposed site was the location of the old Fort Collins sales barn, a railroad spur, two houses, a garage and a barn. The architectural survey of this site completed in 1971 is included as Exhibit "A" with this report. All structures were removed from this site before 1984. See Exhibit "B" which is part of the City aerial photograph taken in 1984. ' The proposed site slopes northeast at a slope is covered with grass and weeds. Runoff from Lemay of 1.6 percent. Avenue flows to The site the north. There is no offsite runoff from the west, north or east. Undetained runoff from the existing restaurant and a small portion of the medical office building ' south of this site crosses over the proposed site. The area of this offsite flow is 0.7 acres. See the crosshatched area on Exhibit "B". ' DRAINAGE CRITERIA: Due to the small basin size, the Rational Method has been used to determine ' peak runoff rates and required detention pond volumes. Design factors used are in accordance with the recommendations and criteria of the City of Fort Collins Storm Drainage Design Criteria and Construction Standards Manual. This site is in the Poudre River Drainage Basin. This basin, by City of Fort ' Collins classification, is in the "Old Town" basin. DEVELOPED SITE: The site will be developed into two commercial building sites with parking, access roads and landscaping areas. A detention pond/wetland and also a picnic ' area will be developed on the north end of the site. The design concept is to detain the 100—year developed runoff onsite in ' a pond on the north side of the site and release at the historic release rate into the existing storm drain system on the west side of Lemay Avenue constructed with the Riverside Shopping Center. All runoff is to the Poudre River. Additional detention will be constructed on the east side of the parking ' areas of both lots. Both detention ponds will function as one with the release control at the headwall to the proposed 15" RCP that crosses Lemay Avenue. I ' Boston Chicken Site Page 2 Existing runoff on Lemay Avenue will not be routed through this site. ' This runoff now flows north to a curb inlet at Riverside Avenue. To compensate for this undetained runoff, this project will detain onsite runoff from 0.7 acres of the existing offsite runoff from the south. This runoff now flows onsite into a low area and remains there as a retention pond. Runoff from this site and the offsite will be restricted to the two—year historic rate based on the site area of 2.7 acres. ' Emergency overflow from the pond.will be at elevation 58.50 feet. Overflow will be to Lemay Avenue. The capacity of the pond to elevation 58.50 is more than 133% of the required capacity. ' EROSION CONTROL; The construction sequence for both -phases will be to first do the rough ' grading of the site, including the construction of the detention pond. The foundations for the proposed buildings will then be constructed. The drainage pipes and water and sewer services will then be constructed. The curbs and ' paving will then be constructed, and the last phase will be landscaping. Erosion control will be provided at the time the rough grading is started. A silt fence will be placed along the east property line to mitigate the prevailing northwest wind. The outlet pipe from the detention pond will have a straw bale filter placed as soon as it is constructed. The two area inlets will also have straw bale filters as soon as the storm pipes are laid and the inlets in place. Gravel filters will be placed at the area inlets after the paving is in place. The filters will remain in place until the landscaping is completed. ' Franklin D. Blake, P.E. & L.S. enclosures 1 .a e 7339 1 �N�• e�i , 'S'a• 'nrn.co 4.�� C ' 103 S. MELDRUM, FORT COLLINS, CO 80521 STEWART&ASSOCIATES ' PH. 482-9331 FAX 482-9382 ' Consulting Engineers and Surveyors By: �J<%Cf7 Date: 2 / 9 Client:Sheet No. of ' Project: ' Subject: yc�v���viso.✓ �ica 2.O ac /X�-ry S D• 7 aC T7/lam Oj��>` �/l> fo fiyl �✓i��� �i��<iS f�C�'� 2�— ' �, 77�re o� Go�c��VT,P.gTio.�J 07 [1 I STEWART&ASSOCIATES PH 482-9311RFAX, FORT 482-938o1 I INs, CO 80521 Consulting Engineers and Surveyors By: /aG� Date: / 9� Client:—BTOr! Gf7/C-���7 Sheet No. �of Proiect: Subject: (_ -7 !S � 1 v�e .3. Z © rSx 2. 9/70 0- D.ZS f Z 6D 25 f ?970 C► D.95 ivy 6,>e S 2.. /70 /9S f ' . 9S "B ��� z sae- /�s�v�•c =Q-- 1 103 S. FORT STEWART&O SSOCIATES PH. 482.93311RFAX 482-938OLLINS, CO 80521 ' Consulting Engineers and Surveyors ey: —IoellinDate: I ZD 9 Client: I�STOti �it//lf�/� Sheet No. �of Project: Subject: ' //sG f�.1177E,2S Q/,glsB.C�i�-1 FO/2 .DioE C.��.gC�TY �: �G cfs 7 /.99cfs pt•oy �$: p,so la a410#1/c s-3 o l�SE' /S".PCP CL yL c"'C,2oSS LCnay /%���c ' 2) D�/T«T ,�PsTP/GTo�✓ �torE . pPricE T//NG 31Z ' = 2 7 7/ /17 z 5b? 3 = /oo-lr f/GUL 57. 37 - x ¢f 41,40 [l �II 1 11 I I STEWART&ASSOCIATES 103 S. , FORTPH. 482-93311RUMF FAX 482-9380LLINS, CO 80521 Consulting Engineers and Surveyors / By: ���/� Date: 2/ Client: �.SSheet No. of Project: Subject: !%ila�TE . �QC9 : GD d�' G?�dScap e �AaE _ �9 GSac ✓ O. 2� e72.OSac e 4. 95� /87>� 77 �— .of ' �-,�.y� T•oBGG , ' 1 1 1 1 / /7 ¢�S. S �,f a� SS in•� 1 ' 103 S. MELDRUM, FORT COLLINS, CO 80521 STEWART& SSOCIATES PH. Consulting Engineers and Surveyors 482/�9331 FAX AX482-9382 � By: Date: Client: E50SlDr/ r��i Sheet No. s of Project: ' Subject: ��i/v� `dLafi r V-;, �13 d �A t ra -f ' (f= d/G . `.4 t 4 4,9, t ✓S.o /9G7 ' S3S7 5�0 3,4Ga 90/0 10, g -fy ' S7. o 2 4 5? 57 •0 7, G/G 1 70 7/ B.Sas/ _ /¢¢ Gucr ✓rpuircc� / 1 -;e45. 5 ' TEWART S $,(ASSOCIATES PH. 482-9ELDRU31 F X482 g 80LLINS, CO 80521 '. Consulting Engineers and Surveyors By: � Date: 2 / Client: ts� C/7i�� �7 Sheet No. of ' Project: �--�� / /J Subject: T5;-'Y (�� cLf/ lri�eic g• diro�i��, r - /P• Fels L. Aai/Ifn /� o ,y ;, /7weI ,41--freyz ' cg - Z. G e 7. 0 /S Z ens e- �/fas O ' I �= o..So� ,• .s = or -¢odd /Z � �a .905 S- O.So%; Qs.�/c�s, • !r Z.1�'��.Scc !rS'E S !/sue /Z ". Fits / /ey , STEWART&ASSOCIATES 103 S. MELDRUM, FORT COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 Consulting Engineers and Surveyors By: Date: Client:Sheet No. 7 of _ ' Project: Subject: o4�rra = D 7 acrv5 077 1 T r• Tioo s, , 7 v /vo ��li�l�O/�CO F<vu/ r"o .Sod r'N i92Ci� _Z"N«T 3. lz = 3 lo. 7, o ' Q Q C 103 S. MELDRUM, FORT COLLINS, CO 80521 TEWART S ' LX �SSOCIATE J PH. 482-9331 FAX 482-9382 Consulting Engineers and Surveyors ��// By: Date: Client: Zao�S '7 G� l':�Xe•7 Sheet No. B of _ r Subject: %�/"z�rl.7lf �C 'S 1 1 1 I = osSV2•d2.z•/s = G • 39 �E/sic 7 TjP /2 a�c� STEWART86SSOCIATES PH. 482-9 311RUMF FAX 482-9382 LLINS, CO 80527 Consulting Engineers and Surveyors By: JfiGh Date: / 9¢ / Client: Sheet No. of_ Project: zC '& fob "7 Subject: //%2//72�je S 117C P</�rroc1 [1 I ,Y= 4. oi3 �rrsridG s�ovE z. A 3 �• 56 Hydraulics 4 Sewers •. • e 71 - . /00 - I 30 70 '' B. le• 60' To •I _ _ _ .000S ..1.5 . . 40 54' .0006 . . �B. 48' - - - 008 ' :0.0009 30 41' - { If' �3i ' I 70 I 30' i �Y o ?�. 27- C� .003 .004 - tiS .007 00 008 B' .000 I � u 9 S.S u a c • II t _ /1' O T o 1 � ' O' -.OS 7.5- ' I, - 4 �p� .06 O7 B 1 i .09 1 r. .8 y r' Pig. IS. Diagram for the solution of Nutters formula for circular pipes Dow - ing full. •■ INC Engineering Consultants Drake Terrace Suite 240 343 West Drake Road Fort Collins. CO 80526 303/226-4955 November 20, 1984 Mr. Tan Gathman ' City of Fort Collins Storm Drainage Department P.O. Box 580 ' Fort Collins, OD 80521 RE: Riverside Shopping Center Filing II ' Dear Tan: This letter report and enclosed drainage calculations are being ' submitted for inclu$ion with the final grading plan and in modification of the Final Storm Drainage Report of June 1984 for the Riverside Shopping Center Filing II project. 1 The proposed Riverside Shopping Center Filing II is located on the west side of South Lemay Avenue approximately 350 feet north of East Elizabeth Street. It consists of three lots with a total combined area of 3.32 acres. ' F3CT.S`I'TT1; STTF. DALTNN:F. ' The topography of the site generally alopes from the southwest to the northeast at approximately 2.7%. The entire site lies within a single drainage basin. Offsite drainage from the south is intercepted by the E]nigh Ditch. This ditch lies along the south boundary; departing to the south at the mid -point of the south property line. Drainage north of the site is to the ' northeast and therefore has no effect on the site. Drainage along the east side is transported..by the site via the westerly gutter along South Lemay Avenue. The site is occupied by vegetation in the form of weeds, grass and numerous trees. All drainage is transported across the site as overland ' flows. I I DMIGN CRTTTMTA ' The amount of stormwater runoff for the site was determined by the rational method. This procedure equates the design flow to the total area, ' amount of rainfall on that area, and a multiplier that is determined by the physical characteristics of the area understudy. ' The bulk of the procedures, methods and numerical constants were obtained from the City of Fort Collins Storm Drainage Design Criteria, dated May, 1984. ' D AT AGF. PLAN The entire 332 acres will be developed in two phases. Phase I involves the immediate development of Lots 2 and 3. Phase II will develop Lot 1 at a later date. As we have discussed, our revised approach for this site involves' discharging storm water directly to the Cache LaPoudre River. No on -site detention is anticipated. Flows will be intercepted at and routed from Curb Inlets #1 and #2, and Area Inlet #1 through the Riverside Shopping Center t Filing I storm sewer system. This scheme has been coordinated with the developer of Filing I. They will oversize their lines to accanodate the 23.2 cfs from our site. ' Inlets for both phases will be constructed under the Phase I contract. Each inlet is sized to capture the 100 year developed run off from each ' respective area of the site. Curb Inlet #1 is located in the south flowline of Pennock Place. Flows from Lot 3 will be discharged directly to the south flowline of Pennock Place and routed via this flowline to Curb Inlet R. This inlet has been sized to intercept the 3.5 cfs anticipated 'from Lot 3. Curb Inlet #2 is located on the north side of the Lot 2 parking lot. This inlet is sized to accomodate the 13.3 cfs anticipated from Lot 2. Area Inlet #1 is located in the northeast corner of Lot 1. ' This inlet will accomodate the 6.4 cfs anticipated fro Lot 1. Inlet control controls the amount intercepted in each case. ' Off site flows from the west, Basin A in the June 1984 report, will be routed along the west lot line of Lot 3, north towards Pennock Place. Off site flows fran the area south of Lot 1 and, part of Lot 2, Basis B in the June 1984 report, may be routed to South Lemay Avenue or Lot 1 ' depending on the grading scheme chosen at the time Phase II is developed. .1 1 1 CONCIUSTONS This drainage plan will satisfy all hydraulic considerations as well as City of Fort Collins current regulations in providing Riverside Shopping Center Filing II with both a safe and equitable method of stormwater ' management. Should you or others have comments or questions concerning this ' drainage plan, please feel free to contact us. - Very truly yours, ' RBD INC. 0 ' nald . Si P.E �0 RESIST 'DFS:klm OQ:P�OF.S�.,9� Enclosure 22306 O�FSS%pN A%L 1 I UM, FORT STEWART&ASSOCIATES PH. 482-933 RFAX 482-938C 20LLINS, CO 80527 Consulting Engineers and Surveyors By: �.4Ch Date: Sheet No. —of Project: Subject: G (JS7" �5T/ti1.9TEO�`/o�✓ (�ONT2oG �) L Orr/ST.eOGTlmnl GPS7" - �zo�/vo ea 3oa 7—OT.9G �}sv 2) 7- / s X l�©© _ 0 /%sd EFFECTIVENESS CALCULATIONS -------------------------------- ----------------------------------- PROJECT: STANDARD FORM B 1COMPLETED BY: DATE: Z/041 I Erosion Control C-Factor P-Factor Method Value Value Comment - S/LT F6,f/CE ----------------------- � O Q•S -------- �3��in f�is,/aG f 6,pnuec s�v�f Fi��ras /. O p. 8' piro� �o Gs��sc��e � �,Qi9aCL ,pASE .YgYF?iAL O.OS /, O �f�<i O✓er/s �l S<�✓er f• �Od.vO977o.v�,Poo<_�tgin<O�LCf' ------------------------ MAJOR- PS I SUB I AREA BASINI (;) IBASINI (Ac) I CALCULATIONS ----- ------ ----- ------ -------------------------------------------- 641p7 7791 2,7* fovNOgf//N 6 I II C 0o/3 t , 0635)/1 4 I I I I I Z��� P �- Facrorz r o- ifo I i I I I I I --------------------------------------- lI/SF-8:1989 Q.7ae ------------------------------ E. elsh-v7 apalla4ers P,0E.0 !-4xA0.7015 0.G ae L/rr.�Scs/oC �./.32e / G�v��sflan s Z7,1—,- -------- ----RAINFALL PERFORMANCE STANDARD EVALUATION ------------------------------------------------ PROJECT: STANDARD FORM A COMPLETED BY: TG/i DATE: P- 1-94"' --------------------------------------------------------------------- DEVELOPEDIERODIBILITYI Asb I Lsb I Ssb I Lb I Sb I PS SUBBASIN I ZONE I (ac) I (ft) I (o) .1(feet) 1 (b) 1 () I J CONSTRUCTION SEQUENCE OJECT:-7OareiJ STANDARD FORM C UENCE. FOR 19! ONLY COMPLETED BY: J%G,� DATE: Indicate by use of a bar line or symbols when erosion control measures will be installed. or modifications to an approved schedule may require submitting a new schedule for proval by the City Engineer. ' YEAR MONTH ---------------------------- RLOT GRADING --y D EROSION CONTROL Soil Roughing Perimeter Barrier Additional Barriers Vegetative Methods tSoil Sealant Other RINFALL 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 a/aue I Base - IEGETATIVE: Permanent Seed Plantin ' Mulching/Sg ealant Temporary Seed Planting Sad Installation Nettings/Mats/Blankets Other - ------------------------------------------------------ -- ------------------------------- ST JCTURES: INSTALLED BY VEITATION/MULCHING DATE SUBMITTED i' SF7C:1989 CONTRACTOR MAINTAINED BY APPROVED BY CITY OF FORT COLLINS ON No Text 1 '1 I 1 i 1 1 1 1 1 .1� 1 1 1 1 1 M`1 DRAINAGE CRITERIA MANUAL 5 3( 1- 20 z w U W IL 10 z w a 0 5 1n w -7 3 O U 2 W 1— t 1 RUNOFF MIFA .2 .3 .5 1 " 2 3 5 10 20 VELOCITY IN FEET PER SECOND /,1A15« FIGURE 3-2. ESTIMATE OF .AVERAGE FLOW VELOCITY FOR USE WITH THE RATIONAL FORMULA. *MOST FREQUENTLY OCCURRI14G "UNDEVELOPED" LAND SURFACES IN THE DENVER REGION. REFERENCE: "Urban Hydrology For Small Watersheds" Technical Release No. 55, USDA, SCS Jan. 1975. 5 -1-84 DRAINAGE CRITERIA MANUAL 5 3C 1— 2 C Z w U D: W a 10 z W IL O 5 w m 3 0 U 2 W H C t 1 RUNOFF I r FA ����% �II�WAWA IN ANFAS►C� BI :: AWC:11:C .2 .3 .5 1 15 2 3 5 10 20 VELOCITY IN FEET PER ECOND �,3��rScC FIGURE 3-2. ESTIMATE OF AVERAGE FLOW VELOCITY FOR USE WITH THE RATIONAL FORMULA. *MOST FREQUENTLY OCCURRING"UNDEVELOPED" LAND SURFACES IN THE DENVER REGION. REFERENCE: "Urban Hydrology- For Small Watersheds" Technical Release No. 55, USDA, SCS Jan. 1975. 5-Z9% 5-1-84 URBAN DRAINAGE 8 FLOOD CONTROL DISTRIrT No Text I 1 W 1 1 � J O . � 1 W � Q z 1 cr o U) �N v/ 1 � W z �w 0 IZ _ c 1 �0Z� m;wC % W 1 W z0�1 W T =zc r H W 1 MC LL° U.. 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CV . r T T T T T r T U) ` L Z H ' Z' 0000000000000000000000 rriouiorrioviovioui0000000(rio(rio T T N N M M�� Cn to CO n• UD (A O T N M to CD O T T T T T T (xJ W � T � E in Q v A k 0 r k c W Z\ 4 p n �i .1 1 1 1 1 1 1 .1 1 1 1 1. 1 1 1 1 1 1 1 i _z Cf) Q m z O F— z W z i- - ww _ cl U_ uJ U Ir Z 0 O v� / W C) Cn W 1 HI tl N N spuusnuU,l. , ,Iaas DIEMD LIO sc000 l o N Urd CD U ro a En o` c 0 c m um a U C N ro N C [U N a a m 0 C fN N O U s a ro r U in 0 W A 76 17r ZIP 0.015 raai .tl Cv.n. '. Solutions by Kutter's Formula' 0'0'1L 55 ' It 0.15 Ji r:l I 1 g e; ao 000y�iou .0o0r i CY h! ., : 8 •rs. 36* _ .0007 . = 7 .iJ,. J3' 27. ..000I ' �•' - T4' .0005 .0006 45 .. .0009 .001 i' �c . 2.0 o rr 2 a /r .003 ` .005�2.5 , 00 008 ti • . l•. 4 i � C` � p OL nr � Q .0n1ZO I 3..0 d ;: I :08 .02 4 325� r ~-0.7 s 6. 3.5 - 1 0 y as .04 .06 G'05 09 03 4 6.0 , .6�— i a 9• L0 . — Dixgrnm for the solution of Butter's formula for circular Pills gig. LC' IIo%.uig full. . '. /'G.G•�5 � I 1 1 1 1 1 a Oil 55 n�Q• Sohttious by ICuttcrs Formula' •��� i Id. Mignun [or the solutill" of J �. ters ton u,..., Ut... _.._ . . je Z. 7 LOVELAND STORM DRAINAGE CRITERIA MANUAL TABLE 704 WEIR FLOW COEFFICIENTS SHAPE COEFFICIENT Sharp Crested— _ Projection Ratio (H/P = 0.4) 3.4 Projection Ratio (H/P = 2.0) 4.0 Broad Crested _ w/Sharp U/S Corner 2.6 w/Rounded U/S Corner 3.1 Triangular Section _ A) Vertical U/S Slope _ 1:1 D/S Slope 3.8 4:1 D/S Slope 3.2 10:1.D/S Slope 2.9 B) 1:1 U/S Slope _ 1:1 D/S Slope 3,8 3:1 D/S Slope 3.5 Trapezoidal Section 1:1 U/S Slope, 2:1 D/S Slope 3.4 2:1 U/S Slope, 2:1 D/S Slope 3.4 Road Crossings Gravel 3.0 Paved 3.1 . - Y COMMENTS H 21.0 H21.0 Minimum Value Critical Depth H !0.7 H 2O.7 H_>0.7 H 21.0 H 21.0 H 21.0 H21.0 H 21.0 N q •1 Y Y •I •1 .I Olf •Il V .u•+l •tl•CI '� ADJUSTMENT FOR TAILWATER WRC ENG. REFERENCE: King h Brater, Handbook of Hydraulics, McCraw Hill Book CGmpany, 1963 NJ E I�•ERSIL'E SHOPPIN r_. -_.- PENNO_K P_AC° s•t 3 /' S7 L S LEGENO� � Z GC o9(/ mr{Srsy >p�/riffs I p'C d —SL—rxisp�T /sis&o/rorrfrri q•� / CIRRI,, l i l.! •{R ie rk dnee.p) 1L 9. — — — _ = crvb crib `R'y..// M, PripM e/G ! Cj6 /Z x x x l4m,rwge arrow — nas,., L.e %4W W ®-® 4anwA31 ,4C+ea j25PA f;`- 2 NTURE ACCESS 69 � p so 1.— - - - 1 E1(TURE ACCESS :t- - - Ss - - _ _ _ SCBLEa /'-3d' 1:)2A1MA6.£ TABLE .. e��a..C�._.. nil .r _ klillililililt_ bao._.a�.__ a.MMM"MM - - IIIIIII N.Y.+r....tiwrrwFarwr.N...afr. IMIAMI,� I. p.A�ENrMrE.•Y•�I�YY ILMVRw AMrraMrrRT..Y Wy�.wyaFIMMIk rrrMMW (nr1..1R'R•.w•1 �RYr s.`IE.rE MOF r�Yr4 .Yr MI.11..rrt MOrr..Y. 5.] SrI Na 4 .rHl.rrFYEr.YgtirF�rL YY ryr rT�r.�R rrS R.raMmr ,1r.�,N.+.Mwr�..LM .rLrrwr�.rrR l-q.�F1LrMRWR.� wr'r.rti w..FMr- uti 1 C�Rc �rw 1W a•, G-..w F.RM, yM.Yti�y�Flrar.Avr,Mrgvw,rr, r 100"w4rML wx ISw Nrar,yRrya,rr�YMAa�Lr.�M. avl4'—s s.�. rl �rrr AYrMrrrwrrY ram E..l-,�.. .dc....l rul.. rSrr.�rrr.....� YwL�r 4 AREA INLET FILTER wr. _ nlL.f MT., T STW BALER MwFrw,w.rlrllar.LyLNra,rL.YrP�LYa SICsx"'n'A OFFoni cRAOUINR coU)MOO S,ORMWTER UTILITY riyWrMYY rW AREA INLE s r 4A�.T,Ya1'rAaae`(.anRyMr(r+.rFr CRY w. v p.2B A M =rw w• F.r+�uwwR..l' GRIN U CITY o c IrrrYa, wns.,M, S;OIIMWNERL I Aeon G T,, QA 4"IT Naromr� 0.vo4 641 Zo Mw. {. llc.r -4_14 c fa yuc s,. 13.N cra De VEL4na Z.>O A.. 6.77 _-- 3M� BAN 1. Tl MITI agas mRSn ks yl w Mull. nanl.m. nrlt l. R.l......1. ,. _w/uAIN: .s Iti" �' ,10 r MMT. r,M - .. RIM SrIr rN .: _... ; aMJ rvI ::N Nw% . vae I M 81,00 T11918111. IPI Rfr 1.1....e.. MR. 5.11 CR65dECFgV VIEW .n4 «,M1,Wmi"llra nm r r_ �.r. STRAW BALE DIKE oeM. . e. a kmn a O.N.,..M,1w GENERAL INSTALLATION --..._.__ .._..._.........._— YM r1w. 2 L`.^a �^ µ• CITY Of FORT COLLINS. COLORF00 51"lu INSTALLED 4 11YnM0 FI r n..m STORNWATER VTILITY rispu.I IN, IT VNE• lR IPlw.ItM nnR.FM aj� rtSWI �.. VI MUULM IN . .u..�..�w..-....-.tea F19R 06TE.VT/BN /ONO 4E disc✓ evoo1 O>NO /e<byl 0.MIKIlNf LOT I'A'Uy6 CONfOnr sF CG CONTAR'.f1 Q S4./ �Z4/ S10 0 SS. o 9L v S8o 9 7{;"frfi 1371 S3S) Sy D 3, ILD gel?)/S,ds9 SB. S A, 9B6 <(�E✓/SEo FfPNo lloeu Z3,3S9>i 9 ez Ar•FY 3;;&~ kKv - - S/S-- se, S' /aO-YB.aR R zY 6GE✓4T1>rY TB 3 SB.2 ,C�Gj///KEO GONO J�U.P•9G6 /744SS CF F.P9EGVF.PO TO bGC✓Fl-/ON ,59 e2 QBLJ/JS6 .P.OTC / fl9 ejs E.POs/OA/ CR✓gr"e NOTES 3 o. /W ?;or___s.(a-� f/ .per:1 LM✓h 2me G/w•ssRv� .Ra.sOAan1,i.er Oie/ TeP/icc A o..i9 >lr 7=G f e Gty 0i Curt CBRirm, coloLBdo w u UTILITY PLAN APPROVALIL I �(/�AF� APPROVED: I�nortl 'lrtemy .1M I .� v CHECKED BY: wa w aer UtiLy DRUM CHECKED CHECKED BY: PabAIVA R Dr axaa Aai c S•/Z CHECKED BY: aM /n CHECKED BY: