5.4. SR 09-07-2004 - Laserfiche WebLink

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Describe measures to minimize or avoid adverse impacts. As recommended by the DNR, flyers with an illustration of the Blanding's Turtle will be distributed to ail site workers. If observed, any turtles in imminent danger will be moved by hand out of harms way to a safe location. Any turtles observed that are not in danger will be left undisturbed. All construction areas will be surrounded by silt fencing to keep turtles from entering construction areas. The silt fencing will be removed after the area is restored. Wetlands will be excavated to a shallow depth resulting in type 5 wetlands. Graded areas will be re-vegetated with standard MnDOT/BWSR seed mixtures and the terrain will be left with as much natural contour as possible upon completion of the project. No permanent roads or utilities will be installed at the Site. Attachment C contains the handout to be distributed to Site workers. 12. Physical impacts on water resources. Will the project involve the physical or hydrologic alteration m dredging, filling, stream diversion, outfall structure, diking, and impoundment -- of any surface waters such as a lake, pond, wetland, stream or drainage ditch? X_~_Yes _ No If yes, identify water resource affected and give the DNR Protected Waters Inventory number(s) if the water resources affected are on the PWI: Describe alternatives considered and proposed mitigation measures to minimize impacts. No DNR Protected Waters are located in the area of the Site. However, five separate wetlands are identified at the Site on the 1991 Nationai Wetlands Inventory (NWl) map and in the Wetland delineation conducted by Liesch in April 2004. A copy of the DNR Protected Waters Map is attached at Figure 7 in Attachment A. It is anticipated that one small wetland at the northern portion of the site and one wetland area on the east side of the site will be excavated to the anticipated mining depth and mitigated on-site at the required replacement ratios. Three other existing type 2 wetlands will be excavated to a shallow depth to remove peat and result in type 5 wetland conditions. As indicated in Item 11 (a), a SWPPP will be prepared to manage storm water run off at the Site. The SWPPP will detail the preventative measures and best management practices that will minimize potential impacts to the wetlands and other off-site water resources. A copy of the NWl Map is included as Figure 6 in Attachment A. A copy of this wetland mitigation plan is included in Figure 10 in Attachment A. Wetland impacts to degraded invasive dominated reed canary grass wetlands will be minimal and total 85,294 square feet. Planned mitigation involves areas totaling 87,454 square feet of new wetland credit, a reed canary grass area transformed to native sedges and grasses for 16,685 square feet of public value credit and 12,545 square feet of planted native grass buffer. This will represent a shortfall of 2:1 wetland mitigation by 53,904 square feet. However, the remainder of the wetland credit will be obtained from the adjacent Schmidt Gravel Mine (Schuer, Inc.) mitigation plan.