Mni Waste’ Water Treatment Facility & Intake Modifications

Final Contract: $23,900,000

Actual Completion: 2017
Owner: Mni Waste' Water Company


Engineer: Banner Associates, Inc.

Project Details
  • Ground Storage Reservoir
    • Construction of a New 1.0 Million Gallon Cast-In-Place Concrete Storage Basin
  • Water Treatment Plant – Design Flow Capacity of 4.4 Million Gallons Per Day
    • Construction of a New Two Level Precast Water Treatment Plant
      • Wall Panels – 31,382 Sqft
      • Double Tees – 22,067 Sqft
      • Hollow Core Plank – 6,294 Sqft
    • Two (2) Clarifier Basins
      • Each Basin Consists of One (1) Flocculation System and One (1) Plate Settler System
      • One (1) Remote Terminal Unit Controls the Flocculators and the Sludge Collector Equipment
    • Three (3) Dual Media Gravity Filter Units
      • Each Units Consists of Two (2) Filter Cells With a Surface Area of 252 Sqft per Cell
      • Block Underdrain With 24” Anthracite Over 12” of Silica Sand
      • Backwash Process Consists of an Air Scour With Water Fluidization
    • Vertical Turbine Pumps
      • Four (4) High Service Pumps
        • 250 Hp With a Design Flow of 1,200 GPM
      • One (1) Backwash Pump
        • 60 Hp With a Design Flow of 4,500 GPM
      • Ductile Iron and Stainless Steel Process Piping, Valves, & Fittings
        • Size Ranging From 4” to 24”
      • Chemical Feed System Consisting of the following:
        • Sodium Permanganate Feed System
        • Aluminum Sulfate Feed System
        • Polymer Feed System
        • Fluoride Feed System
        • Chlorine Feed System
        • Ammonia Feed System
        • Power Activated Carbon Feed System
      • One (1) Hydropneumatic Surge Tank
        • Maximum Allowable Working Pressure of 375 PSIG
        • Maximum Steady State Operating Pressure of 320 PSIG
      • Three (3) Monorail Hoist Systems
        • Two (2) 2-Ton Electric Chain Hoist and Motorized Trolleys
        • One (1) 1-Ton Electric Chain Hoist and Motorized Trolley
      • New Lab, Breakroom, & Office
        • Plastic Laminate and Metal Casework
      • Intake Modifications
        • Removal of Existing Metal Intake Building
        • Removal of Existing Intake Process Piping and Pumps
        • Removal of Existing Wetwell Piping (177.9ft Depth)
        • Construction of a New Precast Intake Building
          • Wall Panels – 5,390 Sqft
          • Double Tees – 2,300 Sqft
        • One (1) Hydropneumatic Surge Tank
          • Maximum Allowable Working Pressure of 230 PSIG
          • Maximum Steady State Operating Pressure of 175 PSIG
        • Vertical Turbine Pumps
          • Three (3) Intake Pumps
            • 250 Hp With a Design Flow of 1,500 GPM
          • One (1) Bridge Crane System
            • One (1) 10-Ton Electric Wire Rope Hoist and Motorized Crane
          • Ductile Iron Process Piping, Valves, & Fittings
            • Size Ranging From 8” to 30”
  • Marine Work
    • Removal of 2,200 Linear Feet of 12” HDPE Submerged Pipe.
  • Site Work
    • RCP Buried Pipe
      • Size Ranging from 12” to 24”
    • PVC Buried Pipe
      • Size Ranging From 4” to 30”
    • Ductile Iron Buried Pipe
      • 24”
    • Cathodic Protection System
    • Two (2) Backwash Lagoons
    • New Sidewalks, Concrete Pavement Drives, Gravel Roads and Final Site Restoration.

This project site is located approximately 20 miles southeast of Eagle Butte, SD. This very remote site offers some amazing views of the countryside and Lake Oahe, but at the same time can present challenges, as the nearest construction supply house is located over 2.5hrs away. As with any project, coordination amongst the major suppliers and subcontractors was critical throughout the duration of the project. With a building footprint of 32,397 square feet, there were many areas that multiple disciplines had to match up perfectly. The utilization of the Trimble GPS system was continuously used to get the pinpoint accuracy PKG strives for. The finishing touches are currently wrapping up. The City of Eagle Butte will soon be getting water from this brand new facility!