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HomeMy WebLinkAboutDrainage Reports - 04/15/1993STORM DRAINAGE AND EROSION CONTROL REPORT FOR LOT 4 OF COLLINDALE BUSINESS PARK SECOND FILING PREPARED FOR EARL WESTON c/o ALLEN D. CURTIS AND BALDWIN CONSTRUCTION PREPARED BY -STEWART & ASSOCIATES_. INC. -103 SOUTH MELDRUM STREET FORT COLLINS, COLORADO '80521 303/482-9331 . MARCH 23, 1993 N Final A �}�3roE ed Pl,ep0q STORM DRAINAGE AND EROSION CONTROL REPORT. LOT 4, COLLINDALE BUSINESS PARK, SECOND FILING SITE LOCATION AND DESCRIPTION Lot 4 of Collindale Business Park Second Filing is a 1.04 acre net area and 1.37 acre gross area site located at the southeast corner of Automation Way and Lowe Street. It is part of the area included in the Drainage Report for the Collindale Business Park prepared in March 1989, and is within the Fox Meadows Basin. The storm drainage procedures proposed in this report are in compliance with the March 1989 Collindale Business Park report. Detention is provided for this site in the Collindale Business Park existing pond located at the northeast corner of the Collindale Business Park development.. The total pond .volume for 34.4 acres was 7.19 acre feet, which is 0.209 acre feet per acre. Therefore, the detention provided for Lot 4 is (0.209) (1.37) = 0.286 acre feet. Runoff from.this site is easterly along Lowe Street to an existing drainageway running north along the west side of Timberline Road. This drainageway is comprised of inlets, pipes and a drainage channel, and it empties into the existing detention pond. The existing Lot 4 is undeveloped and is covered with vegetation, but the steets 'surrounding the site are constructed with curb and pavement. DEVELOPED SITE The site will be developed with a building, paved parking, and landscaped areas. Of the 1.04 acre net site, 0.19 acres wil be landscaped, and 0.85 acres will be hard surface. The attached calculation shows the site runoff for 2—year, 10—year and 100—year storms. These runoff quantities are a part of the quantities shown on the attached site plan which was prepared for the Collindale Business Park report in March 1989. The developed site will drain from southwest to northeast, and the runoff will exit the site via surface drainage at the northeast driveway into the south gutter of Lowe Street. The Lowe Street gutter flows east to an existing 4—foot inlet into the pipe/swale drainageway which runs north along the west side of Timberline Road. The developed C value used in the 1989 Collindale Business Park drainage report was 0.85, which included all streets and developed sites. The composite C for Lot 4 and the adjoining streets is 0.827, so the runoff quantities from Lot 4 are slightly less than the quantities provided for by the original design. There will be offsite flow across Lot 4 from approximately 0.5 acres lying directly south of Lot 4. This area is presently covered with vegetation, but, after development, the runoff coefficient may be as much as 0.85. The curb along the east side of Lot 4 will be extended to the south property line of Lot 4 so that it can intercept the offsite flow and carry it north to Lowe Street. All of the land lying east of Lot 4 will drain to the east, away from Lot 4. Lot 4 of Collindale Business Park Second Page 2 EROSION. CONTROL The entire Lot 4 site will be stripped and graded during the first days of construction, and immediately following that construction of the concrete foundations and pad will begin. The small size of the site and the construction activity do not allow revegetation during the construction period. The contractors' project schedule indicates construction will begin April 1, and paving will be completed June 11. During the construction phase, we plan to install a silt fence along.the east and north sides of the site to prevent sediment from leaving the site. The site is in a moderate wind erodibility zone, and the construction of the building pad and curbs will provide the 200—foot barrier spacing required to prevent wind erosion. All storm drainage and erosion control procedures shall comply with the City of Fort Collins criteria. /14/Ll�i Phillip I. Robinson, P.E. &- L.S. �-'.011j°R1111 /N *; 4502 . q. �. A & )F CD��a 3 MCMURRAY VE. A COLLINDALE a O GOLF COURSE cc 0 a O m UNION_ PACFICFWLROADi AUTOMATION 0 > rR 0= TIMBERLINE AD ¢ O Z m STONEY CREEK DRIVE _ a S2 V m VICINITY MAP NORTH SCALE: 1 1000' STEWART&NSSOCIATES 103 PH- S. ME 3D1RUM, FORT gOLLINS, CO 80521 Consulting Engineers and -Surveyors By: Pl ]Z Date: 2 3 93 Client: �✓eSTOh Sheet No. - of Project: L-oi- ¢. CfoA'ndale 13VS nPss ?0p ( SecoekCJ- r-il%n9 Subject: 6krr, ffy" o.q r 6z jC vim 110 S l j- scriAe_�! �_s(_wr-Fo�c_ � a..l��f A-�_•�- - -� � _a-. _.�_._ �. �. ' � i i { �a•;�Pr�src { G=; �� IY�(U.is t: 9S --. 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I.... -- + COLLIND/A,LL C-OLF C- CA/ FZ-SE z.-a- ,ate- - --,_ ` - =�� - --�^y'r-a�<�.o N ' 03'34 E /e4Z.37' \ `� •�/� --�`J _—� „ \ _ —/ 1� Q10: 3.0 Cfs ` — N oo. o4 43E ` 1330.81 Q1oe= 9.0 Cfc NOTE t Shleldsr irri9aiion d.ic! corr/ez stow*+ flo✓ from Pial)road Al-V PARCCL and from Golf CoVrre \ ' we ro pas a t0 not I �\/ 2 �/ PP � dis+vrb Shieids'dre� i /G P/aRCE DETENryO�,/ DETEIJTIO REQUIRED = 48660<.�• � I 1 \ OUTFWu//: p 37 / /jLLOwgf3LE OVTFLCI w c :ZS. cfr f 1 5 /(wp.ti / / "r .Q 6 4 �I c . 11 ) / /� N / PRFV10USL FUTVRE STR ET �cCL szc A,CJTOMA-rl�l�l/ DRIVE y v.o a t9� OF41_TF LU / o / T_- a / -5 _ ��- -�v: 4S. 15" . P —co, tci 4— CATcl+ 3a9//.1 8 'cp 6,• I Qry: ./< r—.a S cool ST. " 3J. /o 4.a: /I.ScFt FLa4&.S•- 109�- Z7 Qia=21.9•75..=5G3c I I // `�• °/ / / 1.2 A ` J A c9 E cL = M cv w/TN MEAD a..a,Cs «' � / /-LY—GOIJST ¢.CATCN r3AS/1.1 � U PARCEL / ° / / o / PAR'EL I 5 to I M y3fl�'D 4 — (� n, /� N Q . 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I ` Z 1 I i \SI-11FLDS�ITCN� �� ►nu i U V N U u 111 T7415 15 H COPY QF.THE 17i1RINAGE.MI P FRVMT)fEp COLUNDALE BUSINESS PAWge 1969 *Z79,?INA6E REMr?T c j "-------WITH LOT 4¢ RvNaFF 1-:)P47EP _ "_ -. 2 No Text ( RAINFALL PERFORMANCE STANDARD EVALUATION PROJECT: LOT ¢ 691lindole I,Business' j ork STANDARD FORM A COMPLETED BY: y/jz- DATE: 7 --------------------------------------------------------- - �- ----- DEVELOPED ERODIBILITY Asb Lsb Ssb Lb Sb PS SUBBASIN ZONE (ac) (ft) (%) (feet) (%) -------------------- ------ L07 4 Modera� a /, 0 300 o �; 300 1.o I.77. 0 I -----------------------------------------------------. HDI/SF-A:1989 EFFECTIVENESS CALCULATIONS ------------------------ - -- ------ --------------- PROJECT: LOT 4 STAIWARD. FORM B COMPLETED BY: pig DATE: Z 3 Erosion Control C-Factor P-Factor Method Value Value Comment 6- soiJ-- ---------*--- ---------------------------------- .UU l Fencc co acre. e 0� 0,50 U•UI f• oo paver.e" p.al 1.Oo `-rave 6.asG h arkin id� *n bl 0.10 L00 •1 fvfvre � - rc, ----------------------------------------------------- MAJOR PS. SUB AREA ------------- BASIN (%) BASIN (Ac) =....................... CALCULATIONS ----- Ld-r 4 ------ 77.0 ----- ------ 1.04- ------ 45are ------------- Sol) U, ZU A� co�c�e�e �•/0 Ac ,5r-wvf( bate ©. 0 Ac W� d C = LO.ZyX 1.0, } O. e s)(o. a'� .l 0. �9Xv.10) . G'- O.Z•7 �.5.0 E FF = C- �I. Z7)(O- 5- x (00 I I ------------------------------------ ------------ DIISF-B:1989 /0 CONSTRUCTION SEQUENCE PROJECT:. Lo-r 4- (fo)lindale 130sJness rdr STANDARD FORM C SEQUENCE. FOR 19 y3 ONLY COMPLETED BY:.-' pl jZ DATE: Z /S 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 A- I M ----------------------------I----------------------------------------------------------I OVERLOT GRADING f- WIND EROSION CONTROL - Soil Roughing Perimeter Barrier I i 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 VEGETATIVE: Permanent Seed Planting) Mulching/Sealant it Temporary Seed Planting Sod Installation Nettings/Mats/Blankets I Other I ..STRUCTURES: INSTALLED BY. MAINTAINED BY .. VEGETATION/MULCHING CONTRACTOR DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON HDI/SF-C:1989 STEWART&kSSOCIATES 103 PH. S. 93s RUM,FAX FORT 8OLLINS, CO 80521 Consulting Engineers and. Surveyors rr By: Date: Z-S rf3 Client: %ar) WcfTch Sheet No. II of Project: 4- CrAi n n en l e T3' US I,) C.i.I ?O f I{ Subject: Ero S I o h L�-' o n4(-o / Cas7 f - Ut- Z30.J_ .I R0o'),✓OL-fe berrk �% en, .. orc�i i j .f ! ; I 7.5�� 1 1 i �- 1 71i6.5 I (�2 ` CoS4 io ! r %.le P � �' �_ I. 0�-_'�4c I� ; fr�```1 I _ r I 1 till I!1i!iiji�l��l� ! 1 Illll(lii r;i; ill;iil r / � rmot N� a t t oFF51 i5A5) i t t 1 1 1 t t NTS—//7L— (� EXISTING CONTOUR EX15TING SPOT ELEVATION All SPOT ELEVATOR SURFACE pc AlaA6E NEW cONCRETE wy LK PAN I PAD c"CURB/ 21 n`cALL GI/TTER' E NRB/ eZ" OVTFALL .Vlf1s LEGEND: NEW AS>Nq LT PAVEMENT (SNALCI ����� ORAIN A6g RgSIN OOVNVAR✓ N r 56ALE - /'+EO' OE)"I mFMW : }y49.G5 NE ENONNET BOLT ON Fr N. AT sW COR. LO WE rIMLiERLI nIE AU O/✓/FaTI ON WAY you, R� _ Follow t, rrA C_ FUTURE FLOOR NS¢.GO TAP &R^VEL MOa 52,5 E FLOOR• Y9522 0 deal 5Z.40— fee 4rob-, Vol�. ' -.-._'- «'y y." RACM M r for ",w ,fir AT PERSPECTIVE VIEW � 41�� d he Ilan a SECTION A A hil lost "I yourney NEW DRIVEWAY APPROACH DETAILS VERTICAL CURB AND GUTTER V �� OanC by ,"K [ TO CON CT Id e / CCva P$V Xtl f� p 6 It Or 3�e 354 ry y-a byI sg 5.3 pg F[E LPPP9 E 3[TE: g3se Pig of Iar e'Tol s or [r a A 9:eA!ocs•IS : 0 A : of as or .; of TYPICAL SERVICE DETAIL CITY OF Ei.CALLIXS. COLOxXpprnu,�— bell All I F W 1/ _ by of FL 4 N A h O / of �YY h Q y i As iIT 0 �� in r 0 YS GO IRS RECELVALL LIP LID IA FERRY UP ME DRUIT MIT TION ENV MAY MOVE In INUPIM to bar 1,amt. "m MAT 'Troy Pool" 111, 01�, Or loosely x.�R PIT I'my uppecor of all Ad Alto.. Fly It Amid �1.1 Main FPE�101 a I: I Fall Alto assay May A. I "IF Pit Y 91 gemn.a fter Near A, fal Itwi b , Me i.r.xll xildirN STANDARD EXTERIOR SETTING I FOR 3/4• E 1• WATER METERS u Ad\\ Ignore day L.^•/aIM LPlay Any y \ Jam••., It she r Ad My rally, an. cr onz �eR05)ON CONTFZOL L ER(Culu. CO -Te' L PRO"-J 'T COMPLY dO 4TY OF FORT L`. - . TILI cO NTR.a CTPF >HILL S y"J e.. resulting EqV PMENT NECT"55A / To c M IJ Ath aspo 5 TF CK O O -7r A SILT FENC sr CE hhJ57,T-,CTL Lphrog Fl:'.'T/+NEO FL o Thathur NC T. Free 5 D'S TiIT T ally" LO F OM EPVIN6 Togy LbITF Fr t Lia,l EFT coNTF IS 15T0. /. 11017 E5TP 6u Ul-IEp ON T+X 507E. SILT FENCE he yor anI "Ads goolts VERfiCLL QFB MTWXIT COLLIMILE OW COMES VICINITY MAP NORTH > 5C1LE ' i' Ippp' e DRAINAGE TH6LE L- CIRCUS SITE AREA - 1.37 dec NET SITE AR" /.04 Age. HISTORIC C" a,LO OEVSLOPEZY G OF NET SITE 0"02 V,0 OEVO LOPED For OF GR055 SITE a 0.92T OF TOTAL ULLIry OPLE 6U31"I ➢qRW MNP al 7.19 AD or DETENTION RROVIDRD FOR NET ATE - 0,217 A.F. pETENTION ➢ROVIBEO FOR aRy$ 5IT a "0.2E6 A.F. SITE IS LOGATEO IN FOX MEADOWS gg9N N by Will to by .....III,1. I'll of III loss self.ro, om .,.,<...ta de�cladyryhwnt enterente Get users ,bournation of the C14 gibber go sun until our they he and &FeclealMl rMt at res, it.. LOT :Is ro.o..e. er me o,. Ia�..r..m ,ueena "�.n.a mu uun rm W d 7" 'no' fear often end useful of .11 thern therbseed otoll..y I, ad,belittle I. lent -he froters, ant '..ties of I ougalgluj.d wL of eAAVllduyA Million G'�,,, g 1. FAA so' ... r 1. he, Flaherty IMF, plan, by oneyet,by .'?or ... 1 Vegas. AM mPPr�l A. funny r ,xI Will ger bellsup other Front Pay As out ills street meet by MIAMI Eye of 'art Cattle, Pioneer Area" SLingurson Try Orleans 1. L' saill ill . '.oil'. M.I 'a or better to., 'If ;,, bal hours. IR ..'emp Street crah shall As dotherry ad by she Try onshertin t,th,stur W and t'IY body I's .. lying Or.... 111 '.Fee dIM. He I I M loyal Or It", Ad Mardled Of the all'. tyr, .,oh, including rou pu_%,yj Ad way .WM fail mr 2 I Prior 1. life of Add Months too �lr�l., GAP 11 test off ,,..wl. ..M I-- - Ann ... The Met. 7 Ed w e Fortrund, hit I. tr too 1mrr f coal col (1 wbased ..aa...fiberA I All lI Pok W R^ w I b m.anr.0 r".rr the Fiat, or 5 Oak. any 1 'o. w^ mre.uqAM drainage um attnl.n,a•,now to I RMIA, FIT if Me.f ban wT".e A, IMF i easy ideal FAA Me Plant v,.� O O J W Alleges year t at tm.Iwu,wlow At ill�� t.,_. w 11. All Montreal. .,felt'.. ber thin III. ., Mail ." PAR (., s,..a.w Al.w.n w...xacownt.rualon lately, w .In Go` 6 7 am (Angeles Feel Ali. s...r 0 fool u Z N z `I � z 4 Z �O Z<1 V) z hw O QV F Q- C O 11 Ju' lW 4 enter � F-W e by)or F9 o �e �F OwOr ExE[r ONF OF ONE