03/26/2003 Env Bd Packet - Laserfiche WebLink

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Permit Application No. 03 -019 Rockne Goertz February 5, 2003. 7. MPCA NPDES permit application prepared by Applicant, dated January 28, 2003, received February 5, 2003. 8. FEMA Floodways Map, undated, received February 5, 2003. 9. Project Narrative prepared by Glen Rehbein Companies, dated February 5, 2003, received February 5, 2003. 10. Subsurface Geotechnical Assessment prepared by Interstate Geotechnical Engineering, Inc., dated February 19, 2003, received February 27, 2003. 11. RCWD Permit 03 -016, 02 -025 and 01 -028. Findings: 1. Proposed project entails construction of a 39 lot single- family residential development to be known as Ravens Hollow. 2. The proposed stormwater management plan includes 3 treatment ponds all located along the eastern edge of the site. These ponds meet District water quality treatment requirements. Based on discussions on March 7, 2003 with the applicant's consultant, design changes to the existing pond outlets may provide rate control for the site. Once hard copies of these plans are received these changes will need to be reviewed to verify that District rate control requirements are satisfied. It should be noted that the 100 -year flood elevation might subject Ware Road to flooding. Although the RCWD does not have any freeboard requirements for roads, the City of Lino Lakes may not want the pond bounce subjecting Ware Road to flooding. Several swales located throughout the site and the preservation of existing depressional areas satisfies District infiltrations standards. 3. The submitted wetland mitigation plan indicates 10,916 SF of Type 2 wetland impact. This impact is proposed to be mitigated with 11,719 SF of Type 2 NWC and 15,782 SF of PVC through the creation of stormwater ponds. An additional 4,553 SF wetland basin has been determined to be incidentally created and therefore replacement is not required. 4. There is no FEMA floodplain on site. The proposed low floor elevations meet District freeboard requirements. 5. An acceptable erosion control plan has been submitted. Emmons & Olivier Resources, Inc. 3/13/03