The URL can be used to link to this page

Home My WebLink AboutHARMONY MARKET PUD, 8TH FILING, OUTBACK STEAKHOUSE - PRELIMINARY & FINAL - 54-87AB - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTDRAINAGE AND EROSION CONTROL REPORT FOR THE OUTBACK STEAKHOUSE SITE HARMONY MARKET FORT COLLINS, COLORADO Engineers/Surveyors Incorporated Boulder, Colorado Springs 4840 Pearl East Circle Suite 114 Boulder, Colorado 80301 303 4424338 Drexel B arrell 6 v M Engineers/Surveyors Incorporated Boulder, Colorado Springs 4W Pearl East Circle Suite 114 Boulder, Colorado 80301-2473 303 442 4338 Drexel B arrell July 15, 1994 Mr. Basil Hamden City of Fort Collins Utility Services Stormwater 235 Mathews Port Collins, Colorado 80522 RE: Drainage and erosion control study for Outback Steakhouse, Harmony Market Dear Basil We are submitting to you, for your review and approval, this Drainage and erosion control study for the Outback Steakhouse at Harmony Market. All computations within this report have been completed in compliance with the City of Fort Collins Storm Drainage Design Criteria. We appreciate your time and consideration in reviewing this submittal. Please call if you have any questions. Respectfully, David L. Takeda FA520 John Common, P.E. Project Engineer i PRELI MINARY &FINAL I DRAINAGE AND EROSION CONTROL REPORT FOR THE OUTBACK STEAKHOUSE SITE HARMONY MARKET SITE FORT COLLINS, COLORADO JULY 15, 1994 Location and Description The proposed Outback Steakhouse site is located midway between Boardwalk Dr. and S. Lemay Ave. on the south side of Harmony Rd. The site is a 1.26 acre parcel in the existing Harmony Market Shopping Center. More specifically the site is in the NE quarter of Section 1, T6N, R69W, 6th P.M., Larimer County, Colorado. Harmony Rd. borders the site on the north side. The proposed site is currently undeveloped with the exception of some minor landscaping. For the most part the existing ground is grass covered and slopes downward to the southeast at 2% to 3%. The only existing utilities within the proposed site is an 8" sanitary sewer line that ends in the southeast comer. At this point there is a manhole. There is an 8" water line that runs east -west along the south side. Existing_ Drainage _Conditions The proposed Outback Steakhouse site is located in Basin C of Harmony Market. Currently the site receives runoff from a small section of land. south of Harmony Rd(0.34 acres). This sheet flow continues to run through the proposed site and continues onto either an existing entry road or an existing access road. These two roads drain into existing Pond C located further south of the proposed Outback site(see sheets 3 and 6, Overall Drainage Plan: Builder's Square, and Site Grading Plan; prepared by RBD Inc.[#386-001, May 1990]). From Pond C, the runoff enters 4 inlets and is carried to Pond D via 15" RCP. From Pond D runoff flows through a series of culverts to the outlet located under Oakridge Dr., which borders the Harmony Market on the south side. Master Drainage Reference The Outback site is a sub -basin of the Harmony Market PUD Second Filing. Flow and ponding are in accordance with the original drainage design done by RBD Inc. For more information, see the drawings previously referenced. Proposed Drainage Design All developed site runoff shall drain south to Pond C as planned previously by "D Inc. All runoff from off -site locations to the north of the proposed site(0:34 acres) will drain through the Outback parking lot as shown, and then to the existing access road on the south side of the site. Detention ponding for the proposed Outback site is provided by Pond C per the original drainage plan. Flow from the Outback site joins runoff from existing or other sites to Pond C. The subsequent drainage is outlined previously in this report in the Existing Drainage Conditions section. Erosion Control Desi The Outback site is located within moderate rainfall and wind erodibility zones as indicated by City of Ft. Collins zoning maps. Potential for erosion exists as soon as construction begins and will exist until paving and landscaping is completed. Construction is planned to begin in early October, 1994. The projected opening for the restaurant is set for late Winter/early Spring 1995. Overlot grading should begin at the anticipated beginning of the project. Paving should be installed within six weeks of the overlot grading and permanent landscaping should follow as soon as possible after paving is complete.. Prior to construction, silt fencing shall be installed on the south side of the site as shown in the Drainage and Erosion Control plan(in back pocket). Hay bales will be placed at the entry to the construction site. The hay bales must be in place while construction is not occurring. Materials and equipment storage areas should be located to minimize wind erosion. Areas disturbed but not addressed by paving or landscaping shall be seeded with dry land native grasses and protected initially with a hydraulic mulch. Erosion Control Security Temporary erosion control Measures Measure Silt Fences Hay Bails Unit LF EA Total site revegitation: Mulching & seeding AC Use temp. measures to establish security. Security = $1613 x 1:5 = $2419.50 Conclusion Quandy 355 10 Cost $2.25 $4 Total 1.26 _ 1$1,280 Per Unit Total $800.00 $40.00 $840.00 $1613 All design and computations have been completed in compliance with the City of Fort Collins storm drainage design criteria. The site design does not substantially change the drainage patterns. All site drainage will be directed to existing detention ponds. Wind erosion will be minimized by equipment and supply storage placement and by wetting exposed bare ground. The project will also be scheduled to minimize the amount of time bare ground is exposed to the elements. Written by; , David L..Takeda Reviewed by: John Common, P.E. r ► I v66 ♦1 • I IW I!'71 'NO SCALE 41340 PEARL EAST CIRCLE, SUITE 114 (303)442-4338 740 WOOTEN RO.. #108 [7191 591-5151 41340 PEARL EAST CIRCLE, SUITE 114 (303)442-4336 740 WOOTEN RO. #108 [719) 591-5151 EFFECTIVENESS CALCULATIONS COMPLETED BY: QL7 DATE: 711YI-T-1 Erosion Control C-Factor P-Factor Method Value value Cominent MAJOR PS SUB AREA BASIN BASIN (Ac) CALCULATIONS 1.60 MARCH 1991 8-1 s DESIGN CRITERIA LOJECT: CONSTRUCTION SEQUENCE ovr�,Fc�< 5-/,Vw00se ar +IARMgrJY MAiztFr- (tFvsao STANDARD FORM C iffXQUENCE FOR 19 ONLY COMPLETED BY: _ .p47- DATEa//r/1 y Tndicate by use of a bar line or symbols when erosion control measures will be installed. jor modifications to an approved schedule may require submitting a new schedule for proval by the City Engineer. YEAR MONTH 0c,4. I Nov (/mac I JM I Fcb ( I I I I I I OVERLOT.GRADING - - IND EROSION CONTROL Soil Roughening Perimeter Barrier Additional Barriers Vegetative Methods Soil Sealant ®� Other INFALL EROSION CONTROL STRUCTURAL: Sediment Trap/Basin Inlet. Filters Straw Barriers Silt Fence Barriers Sand Bags Bare Soil Preparation oil Contour Furrows Terracing Asphalt/Concrete Paving Other VEGETATIVE: Permanent Seed Planting Mulching/Sealant Temporary Seed Planting Sod Installation Nettings/Mats/Blankets i Other UCTURES: INSTALLED BY MAINTAINED BY 'VEGETATION/MULCHING CONTRACTOR E SUBMITTED APPROVED BY CITY OF FORT COLLINS ON MARCH 1991 8-16 DESIGN CRITERIA ■•tea:■ ■■MEMO ■ENNEN ■ENNEN