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Town engineering: Centerville wastewater plant operating near 80% of design capacity; allocations monitored annually
Summary
Public works staff reported on March 20 that Centerville wastewater flows have declined modestly over recent years after pipe repairs and I&I work; town now estimates roughly 468 EDUs in use, placing the plant at about 80% of the design flow used for planning and allocation.
Public‑works staff on March 20 presented the town’s annual sewer‑capacity estimate, showing Centerville’s wastewater treatment plant is operating at about 80% of the facility’s design flow based on the three‑year rolling calculation the state requires for capacity management.
Staff explained the decline in average flows compared with a few years ago stems in part from sewer‑line repairs, lateral work to property lines, and recent inflow & infiltration (I&I) fixes. The memo presented to council shows the plant’s design daily flow figure and an EDU (equivalent dwelling unit) calculation that accounts for vacant lots, approved projects and developments pending before the town. Staff reported the current allocation tally as roughly 468 EDUs.
Public‑works staff said the 542,000‑gallon‑per‑day figure in previous materials is a design rating, not a numerical state permit limit, and noted permit enforcement and allocation policy rely on the three‑year flow calculation methodology specified by state regulators. Staff said the town will continue to update its capacity‑management document annually and planned to return with recommendations for any allocation‑fee adjustments tied to future plant construction estimates.
Council asked follow‑up questions about specific projects on the allocations table, for example the YMCA’s additional EDU needs. Staff said the YMCA’s phase‑2 allocation is in the tally and that any request for additional EDU for the existing facility will be processed through the allocation policy. Staff also said the North interceptor and several localized spots remain maintenance priorities and that access and equipment needs complicate repairs in some wooded areas.
Ending: Staff will finalize the annual capacity‑management paperwork and bring an updated allocation policy and fee recommendation to the council when the town has completed legal review of the allocation policy revisions.
