The Montgomery County Engineer’s Office plans to replace the Ridge Avenue Bridge over the Stillwater River in Dayton, calling it structurally deficient.
“The bridge is near the end of its servicable life,” Stephanie Goff, a senior engineer for the county said.
The bridge will be closed for the $6.3 million rebuild from Feburary of 2014 until October of 2015.
Federal funds will pay for $5 million of the project, 80 percent of the cost. About $650,000 will come from the county engineer’s gas tax and basic vehicle license fee distributions. The balance, $600,000, will come from Permissive Funds which also come from vehicle license fees, County Engineer Paul Gruner said.
The 220-foot bridge extends between DeWeese Park to the north, Triangle Park to the South and Riverside Drive to the West. About 4,900 vehicles per day cross the bridge.
According to county records, the current bridge’s efficiency rating is 45.1 out of 100, deeming it structurally deficient. The bridge, constructed in 1927, was designed for 20 ton trucks, less than the current design standard of 40 tons.
“Failure to address the condition of the structure will result in it’s continued deterioration, leading to the posting of load limits and the eventual closure of the bridge,” Goff said.
The new bridge will have three spans and it will be wider to accommodate a separate left-turn lane at Riverside Drive and 10-foot wide sidewalks on each side. The city of Dayton requested the enhancements and in return, completed work on the Broadway Street bridge over Wolf Creek for the county, Gruner said.
As part of the improvements, Ridge Avenue will be realigned between Riverside Drive and DeWeese Parkway to soften the curve and to transition from two lanes to three on the bridge, Goff said. It also will be necessary to widen Ridge Avenue on the west side of Riverside drive in order to align the through lanes and to provide a left-turn lane at the intersection.
The bus stop on the northeast corner of the intersection also will be improved.
The World War I memorial on the bridge — honoring D Battery, 134th Field Artillery, 37th Division — and, a cannon will be moved off-site during the bridge construction. Both will be replaced, when the job is completed.
Because of federal requirements, about 0.12 acres of permanent right-of-way and 0.21 acres of temporary right-of-way will be taken from Triangle Park. The city of Dayton has agreed to convert three lots on Delaware Avenue to park use as compensation for the 0.33 acres to Triangle Park.