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Planning Board flags unapproved plastic drainage pipe at Riverrun; asks town engineer to inspect
Summary
Board members found a plastic culvert in the Riverrun subdivision that does not appear on approved plans and is within the right of way. The board directed staff to ask the town engineer (TEC) to inspect and report and to notify the developer if the feature lacks approval.
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Planning Board members raised concerns March 18 after on-site photos show a plastic drainage pipe and a drainage feature at the Riverrun subdivision that are not depicted on the approved plan and lie in the town right of way.
Mark Kennedy, Brentwood’s land-use administrator, showed photographs and said the pipe was “clearly plastic pipe” and that several drainage features observed outside the right of way used plastic, but the feature in question lies in the public right of way and therefore must comply with town ordinances. Lehi Greenwood, the town planner, said she reviewed the electronic plan set available to her and “could not find that drainage feature on the plan.”
Board members discussed the town’s contract with TEC, its engineering consultant, which calls for “independent observation and monitoring of construction activity.” Members said they are uncertain how frequently TEC visits construction sites and whether TEC had inspected or approved that change on Riverrun. The board agreed to ask TEC to visit the site, confirm whether the engineer had previously directed the modification, and report back. Mark Kennedy said he would contact the town engineer, share the photos and follow up promptly.
The Planning Board stressed that concrete culverts are the specified material for drainage within rights of way because they become the town’s maintenance responsibility; installing a different material without approval is not consistent with the town’s standards. The board agreed to use its upcoming meeting with TEC to clarify inspection frequency, reporting expectations and invoice oversight under the TEC contract.
No enforcement notice or formal stop-work order was issued at the meeting; the board’s next step is directing staff to obtain TEC’s inspection and a written confirmation of whether the installed drainage feature was approved.

