MITCHELL BROOK ROAD CULVERT No . 9 REPLACEMENT PROJECT

2026-11-03

Culvert 9 will be replaced with two new culverts as follows : 1 . A new culvert will be required to handle the ditch conveyance and is to be a 30 - inch corrugated metal pipe ( CMP ). This pipe is to be an aluminized metal pipe with a minimum 12 - gauge thickness . The culvert will be approximately 35 feet in length . 2 . A new culvert will be required to handle the intermittent stream that comes off the hillside from the northwest and will require a separate CMP with a minimum 87 - inch x 63 - inch pipe arch providing 32 square feet of waterway area or similar . This pipe is to be an aluminized metal pipe with a minimum 10 - gauge thickness . The culvert will be approximately 35 feet in length . The existing metal Culvert No . 9 will be excavated , removed , and disposed of by the contractor . It is to be noted that there is bedrock ( ledge material ) in the area and was observed to be directly under the existing culvert . Removal of this bedrock material will likely be required for the new culvert installations . Existing backfill will be removed from the trench excavation site by the contractor . Trench bottoms containing bedrock , soft muck , refuse , or other material unable to provide long - term uniform pipe support are unacceptable .

Vermont

2026-04-28