Balancing a new project: Providing additional water storage

Fannin County, Texas — Upper Trinity Regional Water District has initiated work at the site of a future balancing reservoir for the Lake Ralph Hall project. This two-sided reservoir will be located 27 miles from the lake along the pipeline. It will sit at the highest point of the pipeline route, to separate the first section of pipe that pumps water uphill and the second section that uses gravity to carry the water downhill the remaining four miles to the Chapman Lake pipeline, an existing part of Upper Trinity’s system.

The balancing reservoir will have two sides, similar to a double-sided sink, each able to hold around 15 million gallons of water.

See full water-delivery graphic

Garney and subcontractor Thalle Construction are now moving dirt at the site. Crews will begin excavating thousands of cubic yards of dirt before using even more cubic yards of native clay to build the reservoir embankment. The reservoir’s interior sides and floor will be lined with roller-compacted concrete.

Next crews will pour structural concrete for the weir inlet that allows water to flow from the first part of pipeline into either side of the reservoir, and the outlets that release water back into the second part of pipeline. The inlet structure is designed so that water fills both sides of the reservoir evenly, unless one side is shut down temporarily. Having two, isolated sides will allow for regular and flexible maintenance. To maintain the best water quality, the balancing reservoir will be kept at a set water level.

The balancing reservoir is scheduled to be completed summer of 2025.

Piping water uphill:
Pump station construction

Twenty-seven miles of pipeline away from the balancing reservoir, a new pump station is under construction at Lake Ralph Hall. It is a critical component to help convey lake water back to UTRWD’s service area.

A year into construction, the contractor has completed all foundations and below-grade walls, and the crew is currently installing structural steel and precast panel walls. Crews are placing 530,000 tons of steel frame to house the station’s several, 20,000 lb. pumps. They also recently installed a suction pipe that will move lake water from the intake structure at the dam to the pump station. The pumps should begin to arrive onsite for installation this fall.

Source link

Translate »