Project Status

Work Accomplished in 2015-2016:
 
  • Missouri River Intake Investigation

    • The Garrison Diversion Conservancy District has initiated an effort to locate a recommended site for constructing a conventional water intake on the Missouri River as a potential water source for the Red River Valley Water Supply Project (RRVWSP). The investigation is focusing on a stretch of the Missouri River just south of the City of Washburn, ND.  A bathymetric survey of the stretch of river under consideration will be used to assess possible locations and in conjunction with historical river geomorphology records to recommend a preferred alternative. A permit level design of the preferred alternative site will be completed and submitted as part of a permit application with the Army Corps of Engineers.  If a permit for the intake is issued by the Corps, the project will proceed into the final design phase for the intake. 
 
  • Horizontal Collector/Intake Conceptual Design

    • The Garrison Diversion Conservancy District drafted an intake facilities technical memorandum in early 2016 to evaluate different conceptual water supply options for the Red River Valley Water Supply Project (RRVWSP). One of the concepts considered was a bank filtration system consisting of a series of horizontal collector wells located adjacent to the Missouri River. Horizontal collector wells utilize a deep wet well caisson with a number of laterals extended radially into an aquifer fed by an overlying river.  The radials are constructed to draw water indirectly from the river, using the natural soil to filter the water.  Each horizontal collector well also includes a pump station to lift water from the wet well and deliver it downstream through a pipeline.  In order to provide the needed capacity for the project, a total of up to 14 horizontal collector wells may be needed. 
 
  • Water Treatment Plant Option Evaluation

    • The Red River Valley Water Supply Project (RRVWSP) Engineering Team completed and submitted a series of three (3) Technical Memorandums addressing water treatment considerations, options, and concepts for the RRVWSP.  Technical Memorandum 1 considered the various potential impacts of source water quality on the configuration and operation of a RRVWSP water treatment plant. Technical Memorandum 2 developed treatment goals related to the RRVWSP water treatment plant.  Technical Memorandum 3 evaluated treatment processes and plant layouts based on source water obtained from a Bank Filtration system adjacent to the Missouri River, and a conventional river intake on the Missouri River.
 
  • Hydraulics and Structures Conceptual Design

    • The Garrison Diversion Conservancy District drafted a hydraulics and structures technical memorandum in early 2016 to develop conceptual options for necessary structures associated with the Red River Valley Water Supply Project (RRVWSP). Pipeline hydraulics were analyzed for various flows to develop pump horsepower requirements for both the main and intermediate booster pump stations along with optimization of pipeline sizing.  Operational scenarios including the use of a break tank were also evaluated.  Conceptual designs were prepared for the main pump station, intermediate booster station, break tanks, and the flow control valve structure. 
 
  • Pipeline Horizontal Alignment

    • The Garrison Diversion Conservancy District drafted a pipeline alignment technical memorandum in early 2016 to develop conceptual pipeline alignment options for the Red River Valley Water Supply Project (RRVWSP). The pipeline alignment was selected to minimize potential impacts to landowners, wetlands, Federal lands, and other environmentally sensitive areas.  Where possible, the alignment was adjusted to accommodate future access from existing roads and prairie trails.  The revised alignment also attempted to maximize the use of existing easement options where possible. Conceptual costs were developed for multiple routes and pipeline alternatives depending upon the location of the source of the water supply.

Work to be completed in 2016-2017:
  • Implementation Plan
  • Discharge System Conceptual Design
  • Initial Financial Modeling
  • Preliminary User Commitments
  • Missouri River Intake Permit Level Design
  • Pipeline 20% Design (Draft Horizontal Alignment)
    • Discharge Structure Preliminary Design