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'DANE <br /> COUNTY <br /> REGIONAL <br /> AIRPORT <br /> T R U A X F I E L D <br /> June 17, 1997 <br /> After reviewing Chapter 11 of the Dane County Code of Ordinances, the following <br /> information is pertinent to the rezoning of the subject wetlands required to construct a <br /> new air carrier runway (Runway 3/21). This project commenced in May of 1997 and will <br /> be completed in November o 198` . The wetlands to be rezoned and removed as part <br /> of this encom jroect encompass 1 acres; however, 5 acres of wetland will be created on site <br /> p P <br /> and 12 acres of wetland will be enhanced on site as part of this project. In addition, 19.3 <br /> acres of wetland will be created on a separate site in northern Dane County per the <br /> approved 404 permit as mitigation for the removed wetlands. The following items should <br /> also be noted. In addition to the application for a special exemption permit from Dane <br /> County, we have received a Record of Decision for the Environmental Impact Statement <br /> (EIS) from the Federal Aviation Administration, a Corps of Engineers Chapter 404 <br /> Permit, and a Chapter 30 Permit from the DNR. <br /> .• A storm water study was completed as part of the design of this project as the <br /> study confirmed that there will be no increase in storm water runoff as a result of <br /> this project due to the use of detention basins to be constructed on site. In <br /> addition, the flood storage capacity of the site is mitigated on site by providing <br /> flood storage areas to compensate for the fill areas as approved by the 404 <br /> Permit and the approved DNR Chapter 30 permit. <br /> • The site has been designed so as not to adversely impact the remaining wetlands <br /> but rather to enhance the remaining wetlands as approved by the DNR and the <br /> Corps of Engineers. High and low seasonal stream and ground water flows were <br /> all taken into account when completing the design of the site and were also fully <br /> explored for the offsite mitigation design. <br /> • The project was designed to greatly enhance the effectiveness of using existing <br /> and proposed grassed areas to filter out storm water runoff to prevent any <br /> potential contamination that would otherwise drain into navigable waterways. This <br /> was done through the use of a low flow channel design which creates a large <br /> detention basin during high flow periods and the use of a detention basin which <br /> contains the runoff from the storm water system. <br /> • This project includes the relocation of the Starkweather Creek. During and after <br /> 1 <br /> PETER L.DRAHN,AAE•AIRPORT DIRECTOR <br /> 4000 INTERNATIONAL LANE,MADISON,WISCONSIN 53704-3120.608/246-3380•FAX 608/246-3385 <br />