Market Street in South Burlington.
The existing culvert that carries Tributary 3 of Potash Brook under Market Street is undersized relative to it’s upstream drainage area. Culverts that are undersized can cause flooding and property damage during high flow events. They can also cause scour and erosion of streambanks in the area surrounding the culvert. This erosion can have negative impacts on the stream’s water quality. In addition, culverts that are not properly sized and installed can reduce the ability of aquatic organisms to move freely between upstream and downstream habitat.
The existing Market Street culvert consists of a 4-foot diameter by 112-foot long reinforced concrete pipe with concrete walls on both ends. This culvert would be replaced with a 12-foot wide by 5-foot high by 64-foot long bottomless arch culvert supported by a cast-in-place concrete substructure. The new culvert will have sufficient capacity to convey flow from upstream areas and the natural bottom will facilitate passage of aquatic organisms.
Replacement of the Market Street culvert is scheduled to take place during the summer of 2017. During this time, the road may be reduced to a single lane prior to June 20, 2017. The road will be closed for some duration between June 20, 2017 and August 25, 2017, so that the construction crew can install the new culvert.
Market Street Culvert Replacement Plans (PDF, 7 MB)
Last updated 4/4/17