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HomeMy WebLinkAboutENCLAVE AT REDWOOD - FDP220014 - SUBMITTAL DOCUMENTS - ROUND 2 - DRAINAGE RELATED DOCUMENT (2)Project Name: Review Start Date: 2/20/2021 Project Reviewer: Matt Simpson Item Yes/ No/ N.A. Introduction: - Signed and stamped by a PE (at final compliance) N.A. - Description of historic & developed conditions Yes - Discussion & mitigation of impacts on wetlands, receiving waters, etc. Yes - Ditch company/neighboring development approval (if applicable) No - Floodplain description N.A. - Sub-basin descriptions Yes - Quantity detention w/ design parameters Yes - Check target release (historic or master planned rate) Yes - Water quality discussion with design parameters Yes - LID discussion with design table Yes - Variance requests listed (if applicable) N.A. - Check the text is all inclusive and per the outline Yes - Check all descriptions for inconsistencies, errors, & mistakes Yes Hydrologic Calculations: - All basin areas are consistent with drainage sheet in plans Yes - Check all composite C values with developed conditions Yes - Check the overland flow & gutter flow lengths Yes - Verify the intensity and discharge Yes - Verify the inclusion of offsite flows Yes - Verify all drainage calcs consistent w/ drainage plan Yes Hydraulic Calculations: - Check the street flows against allowable capacities Yes King Soopers FDP ***If new submittal, pull Conceptual Review comments. If resubmittal, pull old set of comments to see if there was an correspondence since the last submittal*** Instructions: mark YES if all components are present; mark NO and mark or note all components not present CITY OF FORT COLLINS Drainage REPORT Checklist - Verify inlet sizing and configuration Yes - Check diagram of each storm sewer line and verify design with plans Yes - In UDSewer verify: slope, upstream & downstream inverts, sewer length, pipe diameter Yes - Verify the capacity of all swales and channels (1.33Q100 Yes - Verify the grading of all swales and channels (longitudinal & side slopes, cross-section provided) Yes - Verify outlet erosion protection calculations, check dimensions w/ plans Yes Detention Basins: - Check pond sizing (FAA or SWMM) Yes - Check contour-area table - verify storage capacity Yes - Check 2'-yr orifice calculations No - Check water quality capture volume calculations/elevations Yes - Check the water quality orifice plate calculations No - Check emergency spillway calculations (1’ freeboard, clogged outlet) Yes - Verify stage/storage table is included & elevations match pond grading Yes Low Impact Development (LID): - Check 75% of site’s imperv. area is draining through a LID technique Yes - Check 25% porous pavement requirement is met N.A. - Verify 3 to 1 maximum run'-on area for pavers (if used) N.A. - Verify LID techniques are designed per standards Yes State Wide Compliance: - Check 5'-year storm drain time meets 97% in 72 hours Yes - Check 100'-year storm drain time meets 99% in 100 hours Yes - Verify surface area information is listed Yes Notes: Will be stamped at Final Compliance In FDR Wetlands discussed with Redwood pond, Receiving Waters are the NECCO line The project has a concurrent ditch company approval process, and the ditch company appvoal blocks are included on the plans 100 yr 0.2 cfs/acre See specific details section of FDR See specific details section of FDR Most Tc's are minimum OS Basins to West, into Redwood Pond Inlet Calcs Soopers FDP comments to see if there was any all components not present Calculation completed with StormCAD Swale at western PL SWMM Per coord with the city WQ orifice calculations will be included after the 2nd FDP submittal Tables are included on pond plans See LID Exhibit and Tables See LID above See LID Above See LID Exhibit and Tables Structures detailed, WQ orifice plate details wil be included after FDP R2 after further coordination with the City SDI Compliance worksheets are inclide for each pond SDI Compliance worksheets are inclide for each pond SDI Compliance worksheets are inclide for each pond n with the City