Wipper Bridge Replacement
and to place rip rap around the footings. This fix is meant to last until a new bridge is constructed.
The existing bridge constricts the channel, which magnifies the scour effect of high flows. In order to permanently protect it from 100-year flows, the existing piers and abutments would need to be protected with larger rock to a depth of more than 10-feet. It is unfeasible to do these repairs for a 52-year old timber bridge nearing the end of its useful life. The FHWA approved Emergency Relief (ER) funding for a replacement bridge built to current standards for alignment and width. The new bridge will also create less of a backwater during high flows and may help to relieve some of the upstream flooding that occurs during these flows.
The County hired OBEC, an engineering firm, to do the design of the bridge and the road approaches. County staff will be communicating with the residents, the City of Turner, and any other stakeholders during the design and the right-of-way negotiation phases. Construction of the bridge will be done by a contractor hired by the County and monitored by County inspectors. The Estimated Total Project Cost is $2.2M and includes engineering, right-of-way, and construction. It is 89.73% funded through Federal ER funds, with a 10.27% local match funded by the County through the gas tax. No new taxes will result.
The new bridge will be built upstream of the existing bridge along a larger radius curve. In the next few months we will begin negotiations with the adjacent property owners for the purchase of right-of-way to construct the bridge. We will do our best to address any concerns they may have about the project.
Currently, we are planning to begin construction in the spring or early summer of 2014, though, environmental coordination and right-of-way negotiations may delay the construction starting date. Wipper Road will be open to the public with 1-lane during most of the construction period. However, since the new bridge will be higher than the existing road, there will be an approximately three-week period while constructing the new approach roadway when the road will only be open to emergency vehicles.
NotificationsJune 13, 2013 Public Meeting Annoucement