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HomeMy WebLinkAboutPOLESTAR VILLAGE - PDP220010 - DOCUMENT MARKUPS - ROUND 3 - DRAINAGE RELATED DOCUMENT2 FLOODPLAIN SUBMITTAL REQUIREMENTS The site is on FEMA FIRM panel 08069C0960F, dated 12/19/2006, as shown in Appendix A. The site lies within FEMA Zone X, areas which are determined to be outside the 0.2% annual chance floodplain. The site is not located within a FEMA regulated floodplain, as shown in Appendix A in the FEMA attachments. The site is located in the City of Fort Collins Canal Importation floodway and floodplain, as shown in Appendix A in the City of Fort Collins Flood map. A CLOMR will be prepared after first round PDP comments and a LOMR will be prepared after the construction survey is performed. At time of FP a description will be provided describing how the development is within the applicable floodplain regulation (Chapter 10 of City Code); i.e elevations of the lowest floor above the regulatory flood protection elevation flood proofing, floodway regulation, erosion buffer zone regulation, no-rise, etc. The floodplain use permit will not be submitted until overlot grading. DRAINAGE BASINS AND SUB-BASINS MAJOR BASINS AND SUB-BASINS The Polestar Village site is 20.55 Acres; the site will be developed into a single-family, multi-family residential community with a community center and other amenities. The site will include future regional onsite and offsite detention. The site is located in the Canal Importation basin. EXISTING SUB-BASIN DESCRIPTION There are offsite areas that flow across the proposed development site. The existing drainage basins within the site flow from west to east. The existing basin map is shown in Appendix F of this report. Basin EX1 20.54, acres and 3.1% impervious. This basin is composed of native grassland, an existing shed, and drains to a swale towards West Plum Street. EXISTING OFFSITE DRAINAGE BASINS Currently, the site collects offsite runoff at two different locations. The site is currently in the overflow path of the Scenic Views retention pond and receives direct runoff from Locust Grove Filing No. 3; which enters the site via curb and gutter from Locust Grove Drive. The Scenic Views retention facility, receives overflow runoff from the Pleasant Valley and Lake Canal, runoff from the Scenic Views Multi-family Subdivision, the Colorado State Equine Horse center, and the f FP FP? final plan?