The Ann Arbor City Council voted 10-0 Monday night to award an $812,500 contract for concrete repairs at Barton Dam to the Gerace Construction Co.

Senior utilities engineer Brian Steglitz told council members in a memo the project involves repair of deteriorated concrete on various components at Barton Dam, including the downstream crest beams, sloped apron, piers, abutments and retaining wall.

The overall budget for the project is estimated at $1.15 million, which includes the contract with Gerace, project management and inspection services by city staff, concrete testing completed as part of the study phase of this project, contingency for change orders, a bond issue fee, and engineering services provided by a consultant.

The scope of the project was developed based on testing of concrete cores from more than 30 locations on the dam to determine the extent of the deterioration.

Steglitz noted the work was identified as a high priority for repair as part of a 2009 Federal Energy Regulatory Commission safety inspection, and the city is required to implement the recommendations to ensure compliance with federal dam safety regulations.

Gerace Construction's $812,500 bid was the second lowest of five received. The lowest bidder, Irish Construction, offered to do the work for $651,000, but later withdrew its bid.

Steglitz said because it has been determined the dam provides an equal benefit to both the general fund for hydropower generation and the water fund by providing impoundment, both funding sources will be tapped, and $366,250 will come from general fund reserves.

A timeline for completion of the project was not immediately available.

Council Member Tony Derezinski, D-2nd Ward, was absent.

Ryan J. Stanton covers government and politics for AnnArbor.com. Reach him at ryanstanton@annarbor.com or 734-623-2529. You also can follow him on Twitter or subscribe to AnnArbor.com's e-mail newsletters.