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HomeMy WebLinkAboutDrainage Reports - 07/07/19971 1 1 1 1 1 1 Final Aproved Re ®rt OPEATT OF af� �� iomnim voltT L 's FINAL STORM DRAINAGE AND EROSION CONTROL REPORT FOR DOERR MINOR SUBDIVISION PREPARED FOR THOMAS J. AND KAKI RAE DOERR JUNE 1891997 PREPARED BY STEWART & ASSOCIATES, INC. 103 SOUTH MELDRUM STREET FORT COLLINS, COLORADO 80521 970/482-9331 1 I ' June 18, 1997 STEWART9,�SSOCIATES Consulting Engineers and Surveyors ' Mr. Basil Hamdan Storm Water Utility ' City of Fort Collins P.O. Box 580 Fort Collins, CO 80522 ' Dear Basil, The following is the storm drainage report for Doerr Minor Subdivision. The site is existing Lot 19, Valley Hi Subdivision, Second Filing, and is at the southeast comer of West Mulberry Street and Tyler Street. The site is in the Canal Importation Basin. The net area of the site is 0.228 acres. There is an existing frame residence on what will be Lot 19-A. The rest of the site is vacant. It is proposed to create a second lot for a single-family ' residence. The site slopes from the southwest comer ofthe site to the northeast comer at an average ' slope of 0.75%. Lot 19-A has the existing house and yard, and Lot 19-B has existing ground cover of grass and weeds. Both lots historically drain to the west gutter of Tyler Street and the south gutter of Mulberry Street. The historic grading and storm water runoff of Lot 19-A will not ' be changed in the developed phase. Lot 19-B will have a new house, driveway and walks constructed. A concrete pan will be constructed along the north lime to carry storm water to the west gutter of Tyler Street. The storm water runoff will be discharged into Tyler Street ' undetained, due to the small increase in impervious surface and small increase in runoff The runoff from the site is carried in the existing gutters to an existing curb inlet at the southeast comer of the Mulberry Street and Tyler Street intersection. The inlet discharges into an' existing storm drain in Mulberry Street that flows easterly to City Park Lake. ' Lot 19-B is less than 10,000 square feet and, therefore, is excluded from the erosion control jurisdiction, however a silt fence will be constructed along the south and east line of Lot 19-B and ' a straw bale dike will be placed on the concrete pan at the northeast comer of Lot 19-B to keep sediment off city streets. 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 Doerr Minor Subdivision June 18, 1997 Page 2 The grading plan is enclosed as a part of this drainage report. The drainage report and the grading plan were made in substantial compliance with the City of Fort Collins Storm Drainage Criteria and Construction Standards. If you have any questions regarding this project, please call. Sincerely, = 8 Richard A. Rutherford, P.E. & L. 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FOR 19 1_ ONLY 'COMPLETED BY: R A e, DATE: AAr, S,1997 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. ! 997 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 VEGETATIVE: Permanent Seed Planting Mulching/Sealant Temporary Seed Planting Sod Installation Nettings/Mats/Blankets Other T I F IM.IA STRUCTURES: INSTALLED BY MAINTAINED BY VEGETATION/MULCHING CONTRACTOR DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON HOI/SF-C:1989 ' JANUARY 1991 8-20 DESIGN CRITERI?. 00 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 i STEWAr T&ASSOCWES Consulting Engineers and Surveyors March 5, 1997 Mr. Basil Hamdan Storm Water Utility City of Fort Collins P.O. Box 580 Fort Collins, CO 80522 Dear Basil, The following is the cost estimate for Erosion Control Escrow for the Doerr Minor Subdivision. 1. 120 L.F. of Silt Fence at VAL $ 240.00 2. 1 Straw Bale Dike $ 75.00 3. Re -seed 5000 S.F. @ $0.03/S.F. $ 150.00 The structural erosion control measures sum is $315 x 1.5 = 473. The minimum escrow of $1000 will be required. If you have any questions regarding this escrow amount please call Sincerely, Ga�'" u. Richard A Rutherford, P.E. L.S. rrc 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 5028