Site protection instrument. The mitigation site is located within the NDDOT's permanent ROW. The mitigation site will be protected in perpetuity. In the event of highway abandonment, the terms of the permit and mitigation will be transferred to the receiving property owner. Baseline information. An on-site wetland determination was conducted. The mitigation site vegetation is above the existing adjacent wetland and dominated by upland vegetation typical on NDDOT ROW. The area does not have a cropping history. The upland area will be converted to wetland with hydrology driven by spring snowmelt and storm water runoff. . Determination of credits. Credit ratios were determined using the Wetland Mitigation Banking in North Dakota Interagency Guidance for Mitigation Bank document. Of the .68 acres – of permanent impact, 0.66 require mitigation. 0.18 acres of permanent wetland impacts will be mitigated at a 2:1 ratio (at wetland 5) and 0.48 acres will be mitigated at a 1:1 (at wetlands 5 and 13) to offset 0.66 acres of permanent impacts requiring mitigation identified as wetlands 5 and 13. Table 1: Wetland Credit Ratios and Credit Calculation Permanent Adjacent Wetland Wetland Impact Wetland Mitigation Acre-Credit Acres Number (acre) Classification Type Ratio Created 5 0.15 PEMA Creation 1:1 0.15 13 0.51 PEMC Creation 1:1 0.33 2:1 0.36 Totals 0.84 Mitigation work plan. Six created wetland parcels will be constructed by excavating and grading a variable depth up to 1.5 feet maximum depth depressional area adjacent to the existing wetlands 5 and totaling 0.84 acres. The areas will be graded with a gradual transition from the 1.5 foot depth to the existing grade and contours of the adjacent uplands surrounding the mitigation site. Wetland soils are from permanently impacted areas may be used at the creation site with the final grade matching the existing wetland. If wetland soil is not available, the following wetland seed mix will be used:
Site protection instrument. The mitigation site is located within the NDDOT's permanent ROW. The mitigation site will be protected in perpetuity. In the event of highway abandonment, the terms of the permit and mitigation will be transferred to the receiving property owner. Baseline information. An on-site wetland determination was conducted. The mitigation site vegetation is above the existing adjacent wetland and dominated by upland vegetation typical on NDDOT ROW. The area does not have a cropping history. The upland area will be converted to wetland with hydrology driven by spring snowmelt and storm water runoff. . Determination of credits. Credit ratios were determined using the Wetland Mitigation Banking in North Dakota – Interagency Guidance for Mitigation Bank document. Of the .68 acres of permanent impact, 0.66 require mitigation. 0.18 acres of permanent wetland impacts will be mitigated at a 2:1 ratio (at wetland 5) and 0.48 acres will be mitigated at a 1:1 (at wetlands 5 and 13) to offset 0.66 acres of permanent impacts requiring mitigation identified as wetlands 5 and 13. Table 1: Wetland Credit Ratios and Credit Calculation Adjacent Wetland Number Permanent Wetland Impact (acre) Wetland Classification Mitigation Type Acre-Credit Ratio Acres Created 5 0.15 PEMA Creation 1:1 0.15 13 0.51 PEMC Creation 1:1 0.33 2:1 0.36 Totals 0.84 Mitigation work plan. Six created wetland parcels will be constructed by excavating and grading a variable depth up to 1.5 feet maximum depth depressional area adjacent to the existing wetlands 5 and totaling 0.84 acres. The areas will be graded with a gradual transition from the 1.5 foot depth to the existing grade and contours of the adjacent uplands surrounding the mitigation site. Wetland soils are from permanently impacted areas may be used at the creation site with the final grade matching the existing wetland. If wetland soil is not available, the following wetland seed mix will be used:
Appendix%20A11%20Twelve%20Components%20of%20Mitigation%20Plan%20Example.docx