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ya <br /> ., ° � �;., Dane County Land & Water Resources Department <br /> ` ��"'— Administration • Land Conservation • Office of Lakes&Watersheds• Parks • Water Resource Engineering <br /> ` ,sCOTZS = Kevin F.Connors,Director <br /> July 20, 2016 <br /> Dane County Planning and Development <br /> Room 116 <br /> City-County Building <br /> Madison, WI 53703 <br /> Floodplain Development Permit <br /> Walking Iron Pedestrian/Snowmobile Bridge <br /> Town of Mazomanie, Section 8 <br /> The proposed pedestrian bridge will cross Black Earth Creek at Walking Iron County Park. It will <br /> replace an existing wood and concrete flat span bridge that has become unsafe. The plan conforms to <br /> Dane County Code of Ordinance, Chapter 17, Floodplain Regulations. <br /> The current FEMA base flood elevation is approximately 763' according to FEMA FIRM panel number <br /> 55025C0166H. The new pedestrian bridge will have a low chord of the bridge at approximately 759'. <br /> Compared to the existing bridge, the new bridge will have an approximately 62% larger cross section. <br /> We expect no adverse impact to the regional floodplain. <br /> The following conditions were considered in the design: <br /> • This development shall not obstruct flow, defined as development which blocks the conveyance <br /> of floodwaters by itself or with other development, causing any increase in the regional flood <br /> height; or cause any increase in the regional flood height due to floodplain storage area lost. <br /> • Bridge shall be designed and constructed to have a low flood damage potential. <br /> • Adequate flood proofing measures shall be provided to the flood protection elevation. <br /> The attached map provides a site location of the bridge, including contour elevations. Dane County <br /> Water Resource Engineering has reviewed this plan and are providing their approval. <br /> 0 • <br /> di,.) <br /> Jeri, By . eusek <br /> Division Manager <br /> Water Resource Engineering Division <br /> Lyman F.Anderson Agriculture&Conservation Center <br /> 5201 Fen Oak Drive,Room 208,Madison,Wisconsin 53718-PH:608/224-3730,FAX:608/224-3745 <br /> www.countyofdane.corn/lwrd <br />