The following is from the executive summary of the findings by DuBois & King Consultants and the VTrans inspection team presented at the meeting held in the VTrans Dewey Conference Room led by J.B. McCarthy, and DuBois & King Engineers, attended by the Historic Covered Bridge Committee members (including VCBS members John Weaver and Joe Nelson).
The Warren Covered Bridge . . . has experienced deterioration to several components, most notably the west abutment. Recent VTrans inspection reports have stated that the covered bridge roof is in need of replacement, bearing blocks have developed decay, and the West abutment has heavy concrete facing deterioration. The Town has received a Transportation Enhancement Grant to fund replacement of the west abutment and other necessary repairs.
DuBois & King has performed a site inspection, reviewed inspection records, completed a hydraulic and hydrologic study [and] developed construction cost estimates and identified a series of alternatives.
The results of the hydraulic and hydrologic study were that the existing bridge is sized to pass the 100-year storm with at least 1 foot of freeboard. The recommendations made for the rehabilitation of the bridge are:
Because the total cost of all the improvements exceeds the Town's funding, DuBois & King will work with the town and VTrans to prioritize the improvements.
Note: The VCBS attendees recommended that the Town use steel standing ridge roofing rather than cedar because of the experience of the Town of Johnson losing their bridge to snow load: Cedar shingles do not shed snow readily.
For the complete DuBois & King project study, go to: http://www.vermontbridges.com/warren_covered_bridge_report_draft - november 2013.pdf.
This article was originally posted December 7, 2013