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HomeMy WebLinkAboutBOSTON CHICKEN PUD FINAL - 79 93A - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTjr -4. e -d"M ' • Dr, 1,)z;� w jj ol. fr. 1 -V i .. - ­ •& w., 4;3;, 10I �.w .0� wv IF A6 `w I...• �o .1 "up t IN WII 4F O�f 77 ";T .�� ot, 4k S '0I e io f Palk -%; W�W, - VZMA_�. -Iry fzo W. V11 It 7v. 4fc M a lip, A 4dk N 49 M i --iu. e. .rr ,.,,• �.. av,.'3� vt, Zo, V 4+ % w fw-w ";iVr! A=;kb. �iif N.4 .4j, I / r4 4w J� 44 4C T ,xq, t ­4 4�' -1 1/i: ( _A • K. j Irt 'It E. W v Wo tu , � .1 . - -. - -Y 1�, r jd� ".00 -1 - -L" I. -Ill �A, vl FT! A jow- J. A%I W ."r.,tf ;eA MM I "IN rs 'k iF 1L. y L �rw _44W __j; ,- .� d% , t �� it l �..�y yr�`t:w:.• •ta f� ». 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". 7 _"m J W_ WE `ell LOVELAND STORM DRAT. kGE CRITERIA MANUAL WEIR FLOW COEFFICIENTS TABLE 704 SHAPE COEFFICIENT COMMENTS Sharp Creste3— _ Projection Ratio (H/P = 0.4) 3.4 H 2 1. 0 Projection Ratio (H/P = 2.0) 4.0 H 21.0 Broad Crested _ w/Sharp U/S Corner 2.6 Minimum Value w/Rounded U/S Corner 3.1 Critical Depth Triangular Section _ A) Vertical U/S Slope _ 1:1 D/S Slope 3.8 H >0.7 4:1 D/S Slope 3.2 H >0.7 10:1 D/S Slope 2.9 H >0.7 B) 1:1 U/S Slope _ 1:1 D/S Slope 3.8 H 21.0 3:1 D/S Slope 3.5 Trapezoidal Section 1:1 U/S Slope, 2:1 D/S Slope 3.4 H >1.0 2:1 U/S Slope, 2:1 O/S Slope 3.4 H >1.0 Road Crossings Gravel 3.0 H 21.0 Paved 3.1 H 21.0 O[i•[/ d •V•r!•LC MCI ADJUSTMENT FOR TAILWATER WRC ENG. REFERENCE: King & Brater, Handbook of Hydraulics, McGraw Hill Book Company, 1963 O' DJ QBISolutions by Kuttcr's Formula," Fi,C. 1d. Di!mmll for the solufl"ll Of hllt =.D•S/a C�./c{� ..IT- Z7cfS I Si�� .aio� g= /. 99�s• cd�..� � tw' --VIII Ile I{utter's Forruulanz ao.ia P�� 55 . Solutions by . o, 15 S4 < < I • ':'�'; i ii oog" oog o-C oii .000/ 10— I ' "� ;��.; •: _ 9 moo. 39' - i .0001 7 .9,9. —' 33' 6 — moo. 30� ` .0003 .0005 24.0006 LS .0002 00/ y p r t, 3 19.008 2.0 4' .003(71 0 w 09 3.0 Ck 0.7 0.6 s _ .03 3.5 y I .04 0.5 .06 4.0 v r. .09 - 'u 03 I' .. _ 5.5 _ 02 — .3 4 6'0-- ' 0./ Ti;,. 14:i Diagram for the solution of fiutter's f01.mUla for circular pipes florsing full. O _ ¢"L ��5 _._.... BOSTON-CHICHEN THE MASS DIAGRAM FOR THE DETENTION BASIN 35 30 WT 25 20 �D C 15 C V) 10 0 mill �, z 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0 135.0 150.0 165.0 180.00 TIME IN MINUTES EM Total Runoff Vol. 0 Allowable Discharge Vol. NOTE: Discharge plat does not appear linear since time are not uniformly spaced THIS MASS DIAGRAM TABLE IS FOR USE IN ESTABLISHING THE STORAGE VOLUME REQUIRED FOR THE 100 YR. STORM EVENT BOSTON CHICKEN DETENTION SIZING 0.77 = Runoff c 2.70 = Area acres 1.99 = Release Q 2 *** TIME (min) INTENSITY (in/hr) C*Cf*A (sq.ft.) RUNOFF (cu/ft) OUTFLOW (cu/ft) STORAGE (cu/ft) 5.0 -- 7.001 2.601 5457.41 597.0 4860.4 10.01 7.001 2.601 10914.81 1194.0 9720.8 15.01 6.101 2.601 14267.11 1791.0 12476.1 20.01 5.201 2.601 16216.21 2388.01 13828.2 25.01 4.681 2.601 18243.21 2985.01 15258.2 30.01 4.151 2.601 19412.71 3582.01 15830.7 3S.01 3.831 2.601 20901.71 4179.0 16722.7 40.0 3.501 2.601 21829.51 4776.0 17053.5 45.01 3.251 2.601 22804.01 5373.01 17431..0 50.01 3.001 2.601 23388.81 5970.0 17418.8 55.0 2.80 2:60 24012.51 =: 6567:0 1744.5.5 60.01 2.601 2.60 I 24324.31 7164.01 17160.3 70.01 2.331 2.601 25431.41 8358.01 17073.4 80.01 2.051 2.601 25571.71 9552.01 16019.7 90.01 1.881 2.601 26382.51 10746.01 15636.5 100.01 1.701 2.601 26507.31 11940.01 14567.3 110.01 1.581 2.601 27099.81 13134.01 13965.8 120.01 1.451 2.601 27131.01 14328.01 12802.9 135.0 1.331 2.601 27996.31 16119.01 11877.3 150.01 1.201 2.601 28066.5 i 17910.01 10156.5 I 165.01 1.131 2.601 29072.2 1! 19701.01 9371.21 180.001 1.051 2.60 i 29469.81 21492.01 7977.81 *** NOTE: -if C * Cf > = 1 , then C * Cf = 1 is used No Text DRAINAGE CRITER MANUAL RUNOFF 50 30 1— 2 0 z w 0 a w 0. 10 z w a 0 5 w 3 0 v 2 w F- a t 1 29� i EMINN FAAmonymAlm� .2 .3 .5 1 l5 2 3 5 10 20 VELOCITY IN FEET PER ECOND 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=Z97o 5 -1-84 URBAN DRAINAGE & FLOOD CONTROL DISTRICT DRAINAGE CRITERI. MANUAL RUNOFF 50 30 1— 20 z W U tX W a 10 z w a of 5 W cc 3 O U 2 a W F- a Q 1 0 o �k b �Q 2y U r Js ~` v ci 3 r r OQ�y 4 Q' .2 .3 .5 ' 1 1 'S 2 3 5 VELOCITY IN FEET PER SECOND 10 20 FIGURE 3-2. ESTIMATE OF AVERAGE FLOW VELOCITY' FOR + USE WITH THE RATIONAL FORMULA. *MOST FREQUENTLY OCCURRI14G "UNDEVELOPED" LAND SURFACES IN THE DENVER REGfON. REFERENCE: "Urban Hydrology For Small Watersheds" Technical Release No. 55. USDA, SCS Jan. 1975. 5 -1-84 URBAN DRAINAGE & FLOOD CONTROL DISTRICT No Text CONSTRUCTION SEQUENCE -1 PROJECT:oam�J L���C�/6r� �r `�iY.of- �N.✓Gic�i �,!/O JENCE. FOR 19 94// ONLY COMPLETED BY: STANDARD FORM C DATE: -Aw- /-9!/ 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. YEAR MONTH ---------- ------------------� OVERLOT GRADING --; I 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 .. C'Ariowe/ VEGETATIVE: Permanent Seed Planting Mulching/Sealant Temporary Seed Planting Sod Installation Nettings/Mats/Bla.nkets Other /I//I-f l-f 114 IS101/N1_0 ----------------------------------------------------------- ----------------------------------------------------------------------------- STRUCTURES: INSTALLED BY MAINTAINED BY J.VEGETATION/MULCHING CONTRACTOR 1 DATE SUBMITTED 1 H 3F-C:1989 APPROVED BY CITY OF FORT COLLINS ON 0 RAINFALL PERFORMANCE STANDARD EVALUATION --------------------------------------------------------------------- PROJECT:STANDARD FORM A COMPLETED .BY: DATE: 8- 1-94" ---------------------- DEVELOPEDIERODIBILITY SUBBASIN ZONE ------------ ----------------------------------------------- Asb I Lsb I Ssb I Lb I Sb I PS (dc) I (ft) I (%) 1(feet) I (7.) I ( o) --------------------------------------------------------=------------I )I/SF-A:1989 EFFECTIVENESS CALCULATIONS --------- --------------- --------------------------- PROJECT:�m�t�'//� c7 STANDARD FORM B COMPLETED BY: 1AcZ DATE: Erosion Control C-Factor P-Factor Method Value Value Comment ------------ --w r F,SNGG a",,elSC5 /. DO ez SO ]gcyin pwvac r 9rPAw 8 oit g,9.?eiait s /. DD p,80 PRie? ro ..4s0/,Wc r �,QliOGL fvLdr�i<rErrZs /.Oo a,S�D Pieioa rep i*WA6 L,oM7scA/�i^�4 ��2AdBL ZigSQ N�77�4/AC � O✓� � � �pF'fC? OJ6?LOr � • T6iIUGK ovgrGrl FGr�.vo.a rio.v�,�voc p, D /, d 8��i v P eOJEe T ---------------------------------------------------------------------- MAJORI PS SUB AREA BASIN I-(;)-- BASIN I CALCULATIONS - amk" 77. 9 -(Ac)- Z 7 -- ----------------------------- C- - va rorz CA« 1 s------------- -7,� = o--�v . . ex 7Z9� I ---------------------------------------------------------------------- HDI/SF-B:1989 STEWART&ASSOMIATES 103 . 9331 LDRUM,FAX 482-9 COLLINS, CO 80521 PH.Consulting Engineers and Surveyors By: Date: —� Client: �6�77> nJ CJ,�J/Cfi� Sheet No. —of Project: Subject: f ;r7 SST/�1.9T45 , O�% 1�0�1%T20G -TpT.vc 95'v i i i i 1 i 1 ! STEWART&ASSGNJATES 10 S. LD1RUM,FAX 48 AT COLLINS, CO 80521 82 Consulting Engineers and Surveyors By: C Date: 2 / Client: Sheet No. —; of Project: Subject: 5-X. -15' / a, 'Tr Y.d fG 17, ,gOS�c1015174Vrw- /2 /7 o- oio o, of z asp o.o// d��v l/S /z.,�a .90.5 S- D.,••fo��c�s.�/c�s,1�1�'��.�c 4 i STEV VART&ASSOdATES 103S.MEL 93DRUM, F- COLLINS, CO80521 FAX 482-9382 Consulting Engineers and Surveyors By: Date: Client:Sheet No. �of ' Project: Subject: I ! 90/D I � , 11C 1/3 //, 9�8 I I I i i /JD ,� Zfl, �O 711. //7, ��5. S UM STEWART&ASSOUATES PH. 82-933D1RFAX 82-938OLLINS, CO 80521 Consulting Engineers and Surveyors By: �/�G%� Date: 2/ Client: Z�oSfd�G��'fl�� Sheet No. of Project: Subject: z7- / 37� 1�j we / *e �2.OSac ,� � 9S) 4. 77— � / S /7�SS 5 5' ,¢, �� ai •�J 103 ME DRUM` FC ' COLLINS, CO 80521 STEWART&ASSOUATES PH. . 82 Consulting Engineers and Surveyors By: 47eh Date: s� Client: Sheet No. .5,01 Project: Subject: ,Z-��� l/SC �j!/TlG�Z �S �J/Jf%li•Pi0i9 I %1���/� (� _ � 99 G��S 99 /17 o UsE /S % o p. GS i zs / 2 ,32.Zx�3-74 C I ! i i 1 � I I STEWART�SSORATES 10 82 933DiRUM, FC FAX aa2-93gCOLLINS, CO 80521 Consulting Engineers and Surveyors By: /aG/ Date: Client: Z�d870r-7 Sheet No. -of Project: Subject:/a/r%?9� . �1 I axe J. Z © S.j ? /7p Cr 0.2.s 17011 C5- 2. 9�o mo /70 l9S 7,3 �-- > = /1�.1'7 f- f J 70P /T !BQ-- o - o/ ,z- /0sA4ec 1���/,rQ-- 1/s� FO.P /ZIFIVo STEWART&ASSOuATES Consulting Engineers and Surveyors 103 S. MELDRUK F�, COLLINS, CO 80521 PH. 482-9331 FAX 482-9382 By: Jf/C/7 Date: / 9 Client: 5OcSTO/7 �i����7 Sheet No. - of Project: Subject: yc���v�vis�o.✓ lira 2.O ac �2 �Cfiay ,�vrnvr p.4 a�- p��r.�� �ir2 ��j D• 7 ac '" fir- o���� �i�-� �d f.�� So •��.�i �Go���r�s f�-tr� 2 7 >c �- ! � '�� , �a�,o©sires �l���u� � �r �•�%,��.. I i ��. �Ti1B �,� GO�f/GE/V T,��T/D •� Boston Chicken Site Page 2 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 A silt fence will be placed along the prevailing northwest wind. The outlet a straw bale filter placed as soon as will also have straw bale filters as s inlets in place. Gravel filters will paving is in place. The filters will at the time the rough grading is started. east property line to mitigate the pipe from the detention pond will have it is constructed. The two area inlets oon as the storm pipes are laid and the be placed at the area inlets after the remain in place until the landscaping 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 z 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 of 1.6 percent. The site is covered with grass and weeds. Runoff from Lemay Avenue flows to 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. 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 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. Existing runoff on Lemay Avenue will not be routed through this site. To compensate for this undetained runoff, this project will detain onsite runoff from 0.7 acres of the existing offsite runoff from the south. 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. VICINITY MAP DRAINAGE AND EROSION CONTROL REPORT FOR BOSTON CHICKEN AT LEMAY AND PENNOCK P.U.D. PREPARED FOR ZTI GROUP FEBRUARY 1. 1994 STEWART & ASSOCIATES. INC. 103 SOUTH MELDRUM STREET FORT COLLINS, COLORADO 80521 303/482-9331