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Board approves Willow Landing sewer crossing with conditions: concrete encasement, signage and hold-harmless
Summary
The board approved a sanitary sewer route for Willow Landing that crosses the Willow Pond legal drain on the condition the pipe be encased in concrete, covered by a FlexiMat, signed on both banks, and protected by a hold‑harmless and surveyor-approved bank extension to obtain at least 5 feet of cover where possible.
The Warrick County Drainage Board on Feb. 9 approved a conditional sanitary‑sewer crossing for the Willow Landing subdivision after engineers and the county surveyor described protective measures to prevent damage to the legal drain.
Engineers said capacity constraints with Newburgh Sewer required rerouting a new 10‑inch gravity sanitary line to cross the Willow Pond legal drain roughly mid‑subdivision. To protect the legal drain, the developer proposed encasing the ductile iron sewer pipe in concrete, placing a FlexiMat (armoring mat) beneath the channel to stabilize the flow line, adding conspicuous signage on both banks, and entering a hold‑harmless agreement with the county. The surveyor and counsel advised conditions to reduce risk, including increasing the encasement length until five feet of cover is achieved where feasible and county inspection during construction.
The surveyor advised the board that the crossing would be less than the standard five‑foot cover on part of the alignment but that a 1.3‑foot cover above the downstream pipe could be maintained if the applicant implemented the protections and a hold‑harmless were executed. Counsel recommended signage and a hold‑harmless agreement to protect the county from liability if the flow line changes or third‑party maintenance digs into the encasement.
A board member moved to approve the Willow Landing crossing contingent on the surveyor’s recommendation, the hold‑harmless agreement, FlexiMat installation, concrete encasement, required signage and county inspection; the motion was seconded and carried. The board asked that the county inspector and surveyor monitor construction and that the applicant provide a cross‑section profile and offsets for final review.
The approval permits the developer to proceed to construct the encased crossing under those conditions; the board emphasized careful coordination with Newburgh Sewer, the county surveyor’s office and the highway department during construction.
