06-25-2018 Council Meeting Packet

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appears the preliminary plat roadway width accommodates this and should be verified with the final plat (striping plan). Noted per comment above. 16. The applicant shall move the trail crossing to the intersection of Street C and Street E. 17. The applicant shall widen the sidewalk in front of Block 8, Lot 1 to 8.5 feet between the trail connections. 18. The applicant shall show striped crosswalks for the trail crossings with the final plat. 19. Applicant shall adjust slopes on the back side of the trail to be a 4:1 specifically at the ACD 10-22-32 ditch crossing. This may require extending the culvert length. 20. The applicant should install a fence or guardrail on the east side of the trail near Sta. 8+25. 21. It is suggested that the applicant move the trail crossing near Sta. 8+25 to the south, away from the ditch crossing. Note: the low point location would be adjusted so that the catch basins do not interfere with the pedestrian ramps. • Wetlands and Mitigation Plan The Nature’s Refuge development site includes 7 wetlands on 41.55 acres as outlined in the WCA Notice of Decision approved by RCWD. The plan proposes to fill 2 acres of wetlands, some of which are denoted as “high priority wetlands” in the city’s Comprehensive Plan. A wetland sequencing application was submitted by Kjolhaug Environmental Services to RCWD on January 8, 2018 and is currently incomplete. Approval of a complete sequencing application and submittal and approval of a wetland replacement plan will be required prior to issuance of a grading permit. Wetlands on the project are located within the Wetland Management Corridor and will require mitigation as noted in Rice Creek Watershed District’s Rule F (Wetland Alteration), Section 6(b). Wetland 1 is not located within the WMC. All other wetlands are located within the WMC. Per Kjolhaug Environmental Services. 1. An average 50-foot buffer (25-foot minimum) will be required around all wetland areas following construction. It does not appear that the proposed buffers meet the minimum buffer requirement in all locations. In an effort to minimize impacts to wetlands yet meet project purpose and need, proposed WMC buffer does not meet minimum requirements along some areas of proposed wetland fill. A variance application for these areas will be submitted to RCWD for review with the revised Wetland Permit. Per Kjolhaug Environmental Services. 2. A 10-foot bituminous trail is proposed within the upland buffer adjacent to the wetland in Outlot B. This trail must maintain 25-feet from the edge of the wetland. The City’s Environmental Coordinator is reviewing the wetland buffer areas. Noted. 3. Two deep (30+ foot deep) ponds (Pond 200 and Pond 300) are proposed adjacent to wetlands within the project. The adjacent wetlands are denoted as “high priority wetlands” in the city’s Comprehensive Plan and are noted as having exceptional vegetative diversity. The applicant shall take steps to ensure that the ponds will not drain the adjacent wetland areas. In the WCA Wetland Replacement Plan, the developer shall