The bridge that carries Loggin Road over Marsh Stream at the Frankfort/Winterport town line will close Monday, Aug. 15 for repairs and reconstruction, according to the contractor for the project.

John Stetson, owner of Stetson & Watson of Holden, said some work has already been done this summer, including work around the abutments and putting riprap around the base of the bridge abutments in order to prevent erosion.

That work, said Stetson, did not require the road to be closed. But the upcoming work — which includes work on the bridge deck and retaining walls, along with reconstructing the approach roadway on each end — will require the bridge to be closed starting Aug. 15.

The construction work is scheduled to be completed by mid-October, according to Stetson, and signage has been put in place to indicate alternate routes around the closed span.

“Drivers familiar with the area won’t have any trouble knowing where to go,” said Stetson.

Stetson said the goal of the project is to extend the lifespan of the bridge, which was constructed in 1951. Stetson said he believed the Maine Department of Transportation originally considered replacing the bridge altogether, but that it decided instead to repair and rehabilitate it, deeming that approach more economical.

Stetson said from what he has heard, the hope is that the project will extend the life of the bridge by two or three decades.

Stetson & Watson was the low bidder on the project, according to Stetson, which was designed by MDOT.

According to Stetson, the current bridge was built on abutments that date back about a century.

According to information on MDOT’s website, $1.9 million was set aside for the 81-foot-long Marsh Stream bridge in the department’s 2009-2011 biennial work plan.