Bismarck Wastewater Treatment Facility Expansion & Upgrade

Project Number: 0605

Final Contract: $18,600,000

Actual Completion: 2009
Owner: City of Bismarck, North Dakota

Engineer: Short Elliot Hendrickson


Project Details
  • 24.0 MGD Plant Capacity … 9.25 MGD Average Daily Flow
  • Pretreatment Facility
    • Construction of a New 18,000sf Precast Concrete/Cast-In-Place Concrete Structure
    • Auger Cast Pile & Helical Pier Deep Foundation System
    • Grit Removal, Washing & Dewatering System
  • Primary Clarifier
    • Construction of a New 85’ Diameter Primary Clarifier w/Aluminum Domed Cover
    • Auger Cast Pile Deep Foundation System
  • Clarifier Gallery Building
    • Construction of a New 1,600sf Precast/Cast-In-Place Concrete Structure
    • Auger Cast Pile Deep Foundation System
  • Improvements to Existing Primary & Final Clarifiers Including Galleries
    • Replacement of Two (2) 85’ Diameter Primary Clarifier Mechanisms
    • Replacement of Three (3) 80’ Diameter Final Clarifier Mechanisms
    • New Sludge Pumps & Associated Piping Ranging in Size From 6” to 30”
  • Odor Control Facility
    • Construction of a New 2,200sf Precast/Cast-In-Place Concrete Structure
    • Helical Pile Deep Foundation System
    • Synthetic Media Odor Control System Including Over 9,000cf of Inorganic Biofilter Media
  • Improvements to Existing Flow Control Building
    • Sludge & Scum Pump Replacements
    • Replacement of Piping, Valves, and Meters Ranging in Size From 6” to 24”
  • Improvements to Existing Trickling Filter Building
    • Replacement of Piping & Valves Ranging in Size From 20” to 36”
  • Improvements to Existing Digesters, Gallery & Heat Exchanger Room
    • Construction of New Cast-In-Place Concrete Vault Structures Including Access Doors Into Digester Tanks
    • Replacement of FRP & Ductile Iron Inline Gas Piping Including Numerous Valves
    • Removal & Decommissioning of Existing Gas Purifier System
  • Existing Pretreatment Building
    • Decommissioning and Complete Demolition & Removal of Concrete & Masonry Structure
  • Site Improvements
    • Installation & Operation of a Deep Well Dewatering System Necessary to Lower the Ground Water Table 20’ Over a
    • 15 Month Duration
    • Site Piping Improvements Ranging in Size From 4” to 42”
    • Site Grading, Sidewalks, Curb & Gutter, Asphalt Drives and Final Site Restoration
  • Completion Notes:
    • We were directed by the Engineer to halt construction of the Pretreatment Building for approximately 6 months so that a structural review of the design could be performed, which resulted in a 6 month delay to the project.