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Sewer lagoon pumping and BOD concerns prompt outreach to local industries; state inspector to visit
Summary
Public works reported active pumping and sludge removal steps at the city lagoons, recorded about 2 feet of sludge in primary cells, and said a state pretreatment representative will visit; staff named local dairies and a slaughterhouse among likely contributors to elevated BOD.
Beaver City public works staff told the council Monday that crews have rented pumps and laid discharge pipe to move water out of primary lagoon cells and speed drying. Public works lead Brett Black said the lagoons show roughly 2 feet of sludge in cells designed for 6 feet of storage and that the city plans to pump and dry the cells over the coming days and weeks.
Black said a state pretreatment representative, Jen Robeson, was scheduled to visit the site and that once the review moves beyond the local contact it can lead to stricter state enforcement. He described the dairy and slaughterhouse as significant contributors to biochemical oxygen demand (BOD) spikes in the system and said one of the city's goals — driven by engineering design — is to target a BOD standard of roughly 400 mg/L, which could reduce required equipment and cost (for example, allowing three aerators instead of four in a redesign).
Council members asked whether private operators could be required to install pre‑treatment or joint treatment systems; staff said conversations with the meat plant and dairy were planned and emphasized that state involvement may compel compliance. Staff also discussed options for sludge removal, including local sludging and hauling, and noted that design and capacity work for a longer‑term lagoon improvement project will be required after the immediate dewatering and sludge handling are complete.
No regulatory enforcement action was announced at the meeting; staff said they will continue coordination with the state representative and affected businesses and will return to council with design and cost options for the longer‑term improvement project.
