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Permit A\lplication No. 04-098 John Dahl 14. Comment Letter prepared by MN DNR, dated August 30, 2004, received September I, 2004. 15. RCWD Permit File 98-088. Findings: I. The project entails a lot split on Lot 4, Block 2 (1.901: acres) of The Woods of Clearwater Creek approved under RCWD Permit 98-088. 2. Runoff from the proposed home would flow over green space before discharging to DNR Public Waters Wetland 545w (DNR 545w). Driveway runoff will drain to both DNR 545w and Brian Drive, which drains to a storm water pond constructed as part of RCWD Permit 98-088. This satisfies District storm water management requirements. 3. District staff has field verified existing wetland boundaries as consistent with the delineation approved under RCWD Permit 98- 088. This project proposes filling 1,744 SF (0.04 acres) of Type 6/7 wetland within DNR 545w. This exceeds the deminimis exemption of 400 SF; therefore, 2: I replacement is required per WCA rules. A wetland replacement plan application and. sequencing narrative have been submitted, which indicates the Applicant intends on purchasing wetland bank credits to provide the required mitigation. However, justification for purchasing replacement credits in an adjacent watershed is required. Additionally. the proposed replacement wetland. to be purchased is "out-of-kind" because it is not the same wetland type as the impacted wetland (Type 2). Therefore, the required replacement ratio is 2.25: I. These comments must be addressed before proposed wetland banking credits may be approved to mitigate for the proposed impacts. Proof of purchase of this wetland bank credit is required (after TEP acceptance of sequencing). 4. There is no RCWD 100-year regulatory flood elevation established for this site. No floodplain fill is proposed. The proposed driveway will cross the overland outlet route of the onsite wetland (DNR 545w), which is to be maintained by a culvert of unspecified size. The proposed culvert invert elevations are 904.5(S) and 904.2(N), respectively. The profile view of the proposed driveway specifies the lowest driveway overtopping elevation to be 906.0 and that the existing low point was 904.12. Identification of the proposed 22 LF CMP driveway culvert size (diameter) and hydrologic calculations demonstrating no increase in 100-year flood elevation of the onsite wetland are required. Emmons & Olivier Resources, Inc. 3 9/17/04 I L