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City manager outlines causes of discolored water, $5 million pipelining proposal included in budget
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Summary
City staff briefed the council on recurring discolored water tied to aging unlined cast‑iron pipes, explained a hydrant‑flushing schedule that may stir sediment through May 20 and proposed $5,000,000 in pipelining to line roughly 2.5 miles of pipe this fiscal year.
City Manager (referred to in discussion as Mears) told the Bowie City Council on April 6 that recurring discolored water events stem from unlined cast‑iron mains and tuberculation — iron oxide and internal pipe buildup that can be disturbed by main breaks, seasonal changes or planned valve work.
The manager said the city operates about 90 miles of distribution mains serving roughly 7,900 customers. “Because these lines were originally constructed decades ago as unlined cast‑iron, we are seeing iron oxide accumulation — tuberculation — that can be agitated by breaks or by planned system work,” the manager said. He emphasized that water treated at the plant meets state standards and is safe to drink despite temporary discoloration.
Staff described a hydrant‑flushing program beginning April 7 and running through about May 20 intended to move sediment out of the system; the city warned residents that flushing and valve testing may cause short‑term discoloration in adjacent neighborhoods. The manager also explained two major valve replacements scheduled to improve future reliability and outlined outreach efforts (door hangers and robocalls) for directly affected customers.
On funding, staff said the FY2027 capital budget proposes a $5,000,000 pipelining appropriation to line about 2.5 miles of pipe in a single fiscal year — the largest single‑year pipelining allocation the city has proposed. The city has lined a little over seven miles in the past five years and plans to line about 12 more miles over the next five years; staff said pipelining (cured‑in‑place liners) is more cost‑effective than full excavation and replacement.
Councilmembers asked about whether liners generate microplastics; staff replied that the cured‑in‑place method creates a solid sleeve that is not expected to shed microplastics. Members also pressed for clearer and frequent community communications about expected discoloration and for the city to seek additional federal funds; staff noted the city recently received $2,000,000 and expects another $1,000,000 in federal aid to apply to future projects.
What happens next: Staff will continue the hydrant‑flushing program and provide notices to directly affected residents; the $5,000,000 pipelining proposal appears in the budget the council will consider during the upcoming budget sessions.
