East Devils Lake outlet is on schedule for spring 2012 completion


Governor Jack Dalrymple announced that construction of a pump-flow water outlet at East Devils Lake is on schedule to be completed in the spring of 2012.

‘This project is an important part of a larger, long-term strategy to begin lowering the lake’s level and to protect downstream interests,” Gov. Dalrymple said.

Workers install steel piping as part of the East Devils Lake water outlet project.

The outlet’s steel and concrete pipeline, measuring eight feet in diameter, will extend from East Devils Lake about 5.5 miles southeast to Tolna Coulee. Bartlett and West Engineers, the firm tasked with overseeing design and construction of the outlet, has installed 8,100 feet of steel pipe and 10,000 feet of concrete pipe.

Work will continue throughout the winter to install the remaining 10,000 feet of concrete piping and to complete construction of the water intake at East Devils Lake and the project’s water outfall into Tolna Coulee. When completed, five pumps will transfer up to 350 cubic feet of water per second (cfs) from the lake.

The East Devils Lake outlet is expected to be completed at below the project’s projected cost of $75 million, State Engineer Todd Sando said. The location of the East Devils Lake outlet was selected after comprehensive evaluation of all options. The east-end outlet plan offered the quickest and most efficient way to move additional water off the lake while minimizing environmental impacts.

Dalrymple, chairman of the State Water Commission, said the East Devils Lake outlet is part of a larger strategy to alleviate flooding in the Devils Lake Basin and to protect downstream interests. In addition to building an East Devils Lake outlet, the State Water Commission is working with the Devils Lake Basin Joint Water Resource Board and other stakeholders to build an emergency gravity flow outlet consisting of a one-mile-long, 40-foot-wide channel connecting west Stump Lake to Tolna Coulee.

Since 2005, the state has operated an outlet from the west end of Devils Lake. The west-end outlet was originally built with an operational capacity of 100 cfs. In June 2010, the state completed a major expansion to the outlet, increasing its capacity to 250 cfs. The west-end outlet consists of two pump stations, a rock filter, about four miles of pipeline, and 10 miles of open channel.

Source: Office of Governor Dalrymple