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COMPOSITE REPORT-Page 3 Application No. 6987 This area will be deeded to the DNR following completion of mitigation. Mitigation work will be done by the end of 1997.) 3. Any discovery of previously unknown historic or archaeological remains requires immediate notification of the Army Corps and State Historic Preservation Officer. 4. Measures must be taken to prevent pollutants from entering waterways. Any fill must meet certain specifications and be free of toxic materials. 5. All exposed slopes, fills, and disturbed areas must be given sufficient protection to prevent erosion. 6. contingency plan must be formulated that would be effective in the event of a spill. D. The applicant also proposes to relocate the channel of Starkweather Creek as part of the runway expansion project. The relocation would be generally north of its existing alignment to provide a culvert crossing perpendicular to the runway. February 6, 1997, the DNR granted a Chapter 30 permit to fill Starkweather Creek in its existing alignment, rechannel a new alignment, and provide a culvert under the runway. One particularly relevant finding of the DNR was that: "The proposed project will not result in significant adverse impacts to the functional values of the affected wetlands, significant adverse impacts to water quality or other significant adverse environmental consequences." Filling and grading within 300 feet of Starkweather Creek still requires County Board of Adjustment approval of a Special Exception Permit. BOA review is scheduled for July 24. E. FEMA floodplain boundaries roughly parallel the field surveyed wetland boundaries. On April 17, 1997,the Zoning Division granted a flood zone permit for filling and grading in this floodplain area. F. DNR approved the recommendations of a stormwater plan and other erosion control measures within a submitted erosion control plan. Dane County also approved an erosion control plan on June 20, 1997. G. Section 11.10 of the Dane County Shoreland and Floodplain Management Ordinance indicates that a wetland shall not be rezoned if the proposed rezoning may result in significant adverse impacts on the following italicized features: (Staff comments follow.) 1. Storm and floodwater maintenance capacity. Mead and Hunt completed a stormwater study which provides for detention basins south of the wetland area so that off-site stormwater impacts will not increase as a result of this project. The mitigated floodplain to the west should also assist with stormwater capacity. DNR approved implementation of this stormwater study. 2. Maintenance of dry season stream flow, the discharge of groundwater to a wetland the recharge of groundwater from a wetland to another area or the flow of groundwater through a wetland The project will remove a somewhat degraded wetland, and enhance the functionality of the adjacent mitigated area. The applicant indicates that high and low