The North Texas Municipal Water District is planning a Lavon Lake pump station designed to draw water from below the reach of its existing intakes, with an estimated construction cost of $453 million.

A proposed $207,370 agreement with the U.S. Army Corps of Engineers appeared on the district’s Oct. 22 board agenda. The agreement would fund federal review associated with building on Corps-controlled land near the dam, according to the district’s staff memorandum.

The agenda also included a recommended $12.194 million contract for valve improvements at the Wylie Water Treatment Plant complex. The district’s meeting portal says minutes have not been finalized and voting results are unavailable, leaving approval of both items unconfirmed in the posted records.

Raw Water Pump Station No. 4 would have a pumping capacity of 350 million gallons per day and an intake at an elevation of 451 feet above mean sea level. That would put the intake below the lake’s designated dead-pool elevation of 453 feet.

The three existing stations draw water at elevations between 461 and 467 feet. Those intake levels and pumping capacities prevent the district from fully using its Lavon Lake water right, according to the project page.

The proposed station would improve drought resilience and operational flexibility. Transmission mains would connect it to the Wylie treatment complex.

The Corps agreement would support the federal land-use authorization process, including required environmental review. District staff and consulting engineer Arcadis recommended approval, with funding from the Regional Water System Capital Improvement Fund.

The $453 million figure is an engineer’s estimate of probable construction cost, rather than an awarded construction contract.

Separately, staff recommended Felix Construction Company for work involving six critical valves serving two North Garland pipelines, according to the valve project memorandum. The work includes removing, disabling, replacing and installing valves to make maintenance possible while maintaining service.

Felix was recommended as the best-value proposer among seven firms. Its $12.194 million proposal was $43,212 above the lowest bid.

The request also includes $537,000 for engineering services during construction and $245,250 for district inspection staff. A previously approved $556,042 valve procurement contract would be assigned to Felix.

The projects accompany the final expansion of Wylie Water Treatment Plant IV. In a February announcement, NTMWD said that three-year project would add 70 million gallons per day of treatment capacity.

Once the expansion is complete, the district’s seven treatment plants will have a combined permitted capacity exceeding one billion gallons per day.