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Traffic Control Plan <br /> Rabbit Creek Causeway Spillway Installation <br /> Project Description <br /> Rabbit Creek Causeway is an Amador County road embankment built in 1964 that <br /> separates the Camanche Lake to the south and the Rabbit Creek Lake to the north(see <br /> Vicinity Map attached). Both lakes are interconnected by a 90 inch-diameter steel plate <br /> culvert at the bottom of the 60 foot high embankment. hi February 2006, a large scarp <br /> (approximately 30 foot wide x 30 foot long)occurred due to failure of the culvert, <br /> blocking the hydraulic connection between the lakes. Emergency repair consisting of <br /> filling in the scarp with 1,200 tons of riprap was performed it)early March 2006 to keep <br /> the road embankment from further damage. Without an outflow to the Camanche Lake, <br /> Rabbit Creek Lake is anticipated to overtop and fail the road embankment in the <br /> 2006/2007 rainy season. <br /> To prevent overtopping of the road embankment,the District plans to install a 7-foot- <br /> diameter corrugated metal pipe spillway in the area of the east abutment. The invert of <br /> the spillway pipe will be at Elevation 230',approximately 12 feet below the embankment <br /> crest. The construction needs to be completed by the end of November 2006. Up to one <br /> month of road closure will be necessary to perform this construction. After the spillway <br /> construction,the roadway will be restored to its pre-existing conditions. <br /> Schedule for Construction <br /> Start—November 1, 2006 <br /> Estimated Completion with no rain delays—November 30, 2006 <br /> Traffic Control per attached Vicinity Maps <br /> 1) Lakeview Drive—Road Closed—with turnaround (3-Type 3 barricades) <br /> 2) Curran Road—Detour- directing Camanche N Parkway to Curran Rd/Jackson <br /> Valley Road <br /> 3) Quiver Drive—Detour- directing Camanche N Parkway to Curran Rd/Jackson <br /> Valley Road <br /> 4) Rabbit Creek Causeway(East)— (3- Type 3 Barricades) <br /> 5) Liberty Road(East)—Road Closed Ahead—Local traffic permitted. <br /> 6) County Line-Amador County/San Joaquin County—Road Closed—with <br /> turnaround (3-Type 3 barricades) <br /> 7) Rabbit Creek Causeway(West)—(3-Type 3 Barricades) <br /> Barricades—Type 3 (8"X6' One side reflective)(with Flashing Barricade lights) <br /> Traffic Signs—(Road Closed, Detour)—30"per MUTCD as amended by State of <br /> California. <br /> Information Signs: (Black on Orange 3'X4')All wording based on EBMUD plan as <br /> approved by Amador County <br /> Road Closed Ahead for Causeway Construction from Nov. 1 to Nov. 30"' <br /> P:IDATAIMSOFFICEIWINWORD1Camanche CausewayWraffic Control Plan Temp Spillway.doc <br />