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4 - Dane County Land & Water Resources Department <br /> Administration • Land Conservation • Office of Lakes&Watersheds• Parks • Water Resource Engineering <br /> > i I <br /> - ` ` Kevin F.Connors,Director <br /> June 29, 2016 <br /> Dane County Planning and Development <br /> Room 116 <br /> City-County Building <br /> Madison, WI 53703 <br /> Floodplain Development Permit <br /> Roxbury Creek-Breezeless Blue Dairy Snowmobile Bridge <br /> Town of Roxbury,Section 15 <br /> The proposed snowmobile bridge will cross Roxbury Creek on private property through easements <br /> provided to Dane County. It will replace an existing wood flat span bridge that has become structurally <br /> unsafe. The plan conforms to Dane County Code of Ordinance, Chapter 17, Floodplain Regulations. <br /> The new snowmobile bridge will have a low chord of the bridge at approximately 872'. The cross <br /> section of the proposed bridge is approximately a 170%increase compared to the existing wooden <br /> bridge. 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 /> S' cerely, <br /> Jere ,f: .� : _, <br /> Di /on 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.com/lwrd <br />