Title
AGREEMENT FOR EMERGENCY RECONSTRUCTION OF A BRIDGE ON 61ST ST. NORTH BETWEEN OLIVER AND WOODLAWN (BRIDGE NO. 604-30-1967). B-499. DISTRICT 1.
Presented by: David C. Spears, P.E., Director of Public Works/County Engineer.
RECOMMENDED ACTION: Make a finding that the road has been damaged as a result of a disaster, that the Governor has declared the County as a disaster area, that a hardship would result if the road is not immediately reconstructed, that the County Engineer has provided an estimate of the cost of reconstruction, and that it has been less than 60 days since the Governor's declaration of disaster. Approve the use of an expedited bid process to select a contractor. After hearing a recommendation from the County Engineer, select a contractor and award a contract for reconstruction of the bridge as deemed appropriate by the Board of County Commissioners. Authorize the Purchasing Director or his designee to sign the agreement and any corresponding documents.
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Flooding from storms on July 3, 2016, and September 9, 2016 has damaged a bridge on 61st St. North between Oliver and Woodlawn. The bridge consists of a pair of steel plate arch pipes (2 at 12' 7" x 7' 9") that have been in place since 1972. The initial storm damaged the bottom of one of the pipes by buckling up the bottom of the pipe for approximately 40 feet. The storm in September eroded supporting soils which resulted in about 10 inches of deformation in the sidewall. It is not possible to repair the existing pipes.
Major storms could erode out enough supporting soil to allow the pipe failure to continue, which would lead to settlement in the road bed. Public Works has posted the bridge at 3 Tons and implemented a monitoring program to detect settlement in the road. If settlement is detected or further damage is found after a major rain, the bridge will have to be closed. The road carries over 3,000 vehicles per day and is the major link between K-254 highway and t...
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