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Larimer and Weld counties, Colorado

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Greeley

Staff expect Greeley’s $50 million wastewater upgrades to finish in November 2027

·Greeley·Weld County

From the Greeley Water and Sewer Board meeting of

The plant has continued operating during construction. The work adds backup power, new pumps that bring wastewater in and side-stream treatment processes addressing phosphorus and nitrogen.

Greeley’s $50 million wastewater plant upgrades are almost 60% complete and expected to finish in November 2027, a staff member told the Water and Sewer Board on Oct. 21.

Staff said findings of the 2018 master plan drove the upgrades, which generally follow its phasing. The work covers the front end of the plant’s primary processes and includes a generator, a blower and air header, and side stream treatment improvements. The plant has remained in operation during construction.

MagPrex, a new side stream treatment process, is intended to reduce phosphorus recirculated from the back of the treatment process to the front. The staff member said it “was based on projected new phosphorus levels” and could help the city reduce phosphorus over the long term. The work could also help with state voluntary incentive program credits, the staff member said.

Another side stream treatment process, Anita Mox, is being added to the plant. The work involves rehabilitating the centrate building and a tank. The process helps the plant meet regulatory requirements for nitrogen in its effluent, the staff member said.

A medium-voltage generator was planned for a previous major construction project but was delayed because of cost constraints, staff said. The wastewater facility is required to have backup power, staff said. The older generator was taken out of service with the new one, and masonry work in the former generator space was completed over the summer.

Two new pumps that bring wastewater into the plant have been installed. A third is coming. Staff said the pumps were sized according to population growth projections in the 2018 master plan.

More from this meeting

  1. Greeley Water and Sewer Board, Oct. 21, 2026

    Greeley raises Amrize water lease to 32 acre-feet a year; Greeley renews reservoir caretaker lease starting at $5,000 yearly; Greeley working on 175 planned lead and copper replacements.

  2. Item 5Greeley raises Amrize water lease to 32 acre-feet a year

    The lease costs $1,475 per acre-foot, with annual increases tied to the consumer price index. Its initial term runs through 2028, followed by two five-year renewal terms.

  3. Item 6Greeley renews reservoir caretaker lease starting at $5,000 yearly

    The 10-year agreement covers continued use of city-owned structures on 2.44 acres. Rent increases after five years to $5,250 or more, depending on the Consumer Price Index.

  4. Item 7Greeley working on 175 planned lead and copper replacements

    Phase 4 replacements are expected to finish by the end of the year. Final potholing is also expected to wrap up then, with any replacements identified in that phase planned for 2027; the loan-financed project totals $14 million.

  5. Item 10Greeley prepares pipeline work as $8.6 million grant reaches state

    The city plans to prepare procurement and federal grant paperwork by year-end, select a contractor and order long-lead materials. Construction could begin around May 2027.