Prosper - Celina | March 2026

Funding the flow From the cover

How it works

The gist

The Doe Branch Water Reclamation Plant collects wastewater, filters out debris, uses bacteria to eat harmful chemicals, then deposits the water back into Lake Lewisville.

Funding the flow Celina officials approved the project’s final price increase in December. months, of the plant increased by $13.5 million, while Prosper’s portion decreased by $20.5 million after the town reduced its flow allocation. The Doe Branch project will expand the water reclamation plant’s capacity from 4 million gallons per day to 12 million gallons per day, or mgd, and add a pipeline extension from the plant to Fishtrap Road. The plant was previously expanded in 2021, but local officials said continued population growth in both municipalities prompted the immediately started expansion,” UTRWD Communications Director Jason Pierce said. Construction was estimated to cost $209.9 million, but the project has seen price increases, primarily due to inflation. Celina’s share, which has seen increases in recent need for another expansion. “We finished construction and

Water treatment plant

Raw water

Lake

Drinking water

Reclaimed water

Homes and businesses

Water reclamation plant

Wastewater

SOURCE: UPPER TRINITY REGIONAL WATER DISTRICT/COMMUNITY IMPACT

Breaking it down

Celina: $135M

capacity, bringing the plant’s total capacity to 12 mgd. Doe Branch will treat an additional 4 mgd from Celina and 3 mgd from Prosper, leaving 1 mgd of new treatment capacity unclaimed. “We’d like to see what the actual usage is before we’re funding capacity that the town’s not going to use,” said Chuck Ewings, Prosper assistant town manager. Celina and Prosper will split the cost of the remaining 1 mgd until it is claimed, said Kim Brawner, Celina assistant city manager.

Doe Branch has a permit to process 4 mgd, but UTRWD Operations Supervisor Steven McHenry said that with the rapid growth in Prosper and Celina, Doe Branch is currently treating about 6 mgd, or 150% of its permitted capacity. Doe Branch treats 1.64 mgd of wastewater from Celina and 1.13 mgd from Prosper. The plant also helps provide wastewater treatment services for smaller communities such as Savannah and Arrowbrooke. The expansion will add 8 mgd of treatment

Prosper: $105M

Upper Trinity Regional Water District, other sources: $29M

SOURCES: CITY OF CELINA, TOWN OF PROSPER/COMMUNITY IMPACT

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