RED RIVER VALLEY | TRENCHLESS
To match the overall phasing and funding of the
RRVWSP program, the project has been divided into two elements: the Missouri River Intake System and the Pipeline System.
MISSOURI RIVER INTAKE SYSTEM The Missouri River Intake (MRI) is located in central North Dakota, approximately five miles southeast of the city of Washburn, and consists of a conventional submerged intake structure, a conveyance tunnel, and the MRI Pump Station (MRIPS) wet well/shaft. The system is being constructed in a series of three contracts, as shown in Figure 2. Contract 1 consisted of constructing a 42-ft diameter
by 65-ft deep concrete wet well shaft, site and site access improvements and maintenance of access road, grading, clearing and grubbing, and drainage improvements. The contract was completed in Fall 2021 to facilitate access for Contract 2. Contract 2 consisted of constructing the foundation
and installation of piping in the Missouri River for the future submerged passive intake screen. This included the installation of approximately 1,600-ft of 72-inch diameter tunnel connecting the existing wet well/shaft on the riverbank to the screen structure foundation in the river. Contract 2 also included installation of the final liner for the MRIPS wet well and was substantially completed in Spring 2023. Contract 3 will include work associated with
installing mechanical and electrical equipment that are required to make the Intake System operable near the end of the decade.
PIPELINE SEGMENTS In order to convey water from the Intake System to the Discharge Structure at the Sheyenne River, a series of buried pipelines will be constructed under separate smaller segments as part of the RRVWSP program. Contract 5 constitutes approximately 28 miles of
pipeline spanning from the intersection of 1st Street NE and 57th Avenue NE near Sykeston, ND in eastern Wells County and continues east approximately midway into Foster County to end near the intersection of 1st Street SE and 83rd Avenue SE near Kensal, ND. Contract 5 is further divided into the following contracts: ● Contract 5a: construction of ~1-1/4 miles of 72-inch diameter steel water pipeline, including one 96-inch diameter trenchless crossing under U.S. Highway 52/281 and the Red River Valley and Western Railroad.
● Contract 5b: construction of ~9 miles of 72-inch diameter steel water pipeline, including one 96-inch diameter trenchless crossing under the Canadian Pacific Railway.
● Contract 5c: construction of ~8 miles of 72-inch diameter steel water pipeline, including two 96-inch diameter trenchless creek/river crossings and one 96- inch diameter trenchless gas line crossing.
● Contract 5d: construction of ~10 miles of 72-inch diameter steel water pipeline, including two 96-inch diameter trenchless wetland crossings.
Contract 6 constitutes ~25 miles of 72-inch diameter steel pipeline spanning from east of Carrington, ND to southwest of Cooperstown, ND. Contract 6 consists of 12 trenchless crossings under several wetlands,
Left, figure 3:
Preparing to launch the MTBM ‘Pamela’ for the 72-in diameter RRVWSP CT. 2 Missouri River Intake Microtunnel
Fall 2023
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