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September 3, 2015 <br /> Roxbury Creek Dorf Haus Clear S•an Bridge Narrative: <br /> Dane County Parks is requesting approv:Ito install a multi-use clear span bridge across Roxbury <br /> Creek, behind the Dorf Haus Supper Clu• (see attached location map). Dane County Parks is <br /> proposing to replace the existing bridg: sized at approximately 12' wide by 30' long that has <br /> become unusable, with a clear span bri•ge sized at 12' wide by 40' long. The current bridge <br /> abutments are too close to the stream •ank to provide the proper support, the deck is leaning <br /> to one side, and the approach on the w:st side of the bridge is sinking. Since this bridge can no <br /> longer support equipment, Dane Count Parks is proposing to construct a new, steel beam with <br /> wood deck, clear span flat bridge. The ulti-use clear span bridge will meet water navigation <br /> guidelines of 5'-0" above the ordinary h :h water mark, and be designed and engineered for <br /> minimal environmental impacts, similar o other bridges that have been permitted within Dane <br /> County Parks. <br /> The bridge will be built according to the attached bridge plans. Dane County Parks is proposing <br /> to remove the existing bridge, restore a d stabilize the area, and install a new, clear span <br /> bridge, 12'wide by 40' long. The clear s•an bridge will be anchored in place with galvanized, <br /> schedule 40 pipe.There may be minor b:nk scarification for the floating pan footings. No more <br /> than 5 cubic yards of material will be re oved, if required,to accommodate placement of the <br /> galvanized floating pan footings. Excava'ions on each side of the bank will not exceed 1'-0" in <br /> depth and %" limestone will be placed .nd compacted to support the pans. Erosion control <br /> will include a 12" silt sock placed on the •ownside slopes to keep debris from entering the <br /> creek. <br /> The proposed clear span bridge will hav: no restriction on flow within Roxbury Creek since the <br /> proposed bridge is designed to span the entire length of the creek and the proposed longer <br /> length will meet stable grade on both si•es of the creek. <br /> Page I 1 <br />