NORTH HERO BRIDGE 5
REPLACE CONCRETE DECK OF BRIDGE NO. 5 ON US2 IN NORTH HERO, OVER ALBURGH PASSAGE.
Project Location: Approximately 0.2 miles east of the intersection of US Route 2 with VT Route 129 in the Town of North Hero
The North Hero BF 028‐1(30) Bridge 5 project will replace the existing bridge concrete deck, that is structurally deficient , with a new bridge deck that meets current design standards. The existing bridge is a seven span cast‐in‐place deck on steel plate girders constructed in 1954. The existing bridge is 826 feet long and 35 feet wide with a curb‐to‐curb width of 30 feet. The deck is in poor condition, the superstructure is in fair condition and the substructure is in satisfactory condition based on the most recent inspection.
VTrans evaluated alternatives for rehabilitation of North Hero VT US Route 2 in an engineering study completed in June 2016. The study assessed the proposed design criteria for the bridge, impacts to right‐of‐way, wildlife, hydraulics, historic and archeological resources, as well as the needs of the local community. Several alternatives were considered including, no action, deck replacement, superstructure replacement, full bridge replacement on‐alignment and full bridge replacement on the old alignment. Given the site constraints and current condition, VTrans is moving forward with replacing the concrete deck (including minor steel superstructure repairs) using phased construction.
The new bridge will have two 11‐foot lanes and two 5‐foot shoulders to meet Vermont State Design Standards, and accommodate pedestrians and bicyclists. The proposed new deck will be supported by the existing steel superstructure and existing substructure. The proposed bridge rehabilitation will require minimal approach roadway work and the vertical curve on the bridge shall remain the same to maintain the existing channel opening in the main span.
The maintenance of traffic options considered included bridge closure with an offsite detour, phased construction, temporary bridge and maintaining traffic on the existing bridge while building a new bridge on a new alignment. Based on cost, length of detour routes and minimizing impacts to ROW and resources, a phased construction was chosen as the best method for traffic control. A single lane will be maintained on the bridge with alternating one way traffic signals at each end. There will be emergency vehicles overrides in place at each end to minimize impacts to emergency response times between Alburgh and North Hero.
One lane alternating traffic with a traffic signal while the superstructure is constructed in phases.
Bridge Location Map
Link to project sharepoint site: https://outside.vermont.gov/agency/vtrans/external/Projects/Structures/13b264