Client:
City of Sioux City, Iowa

Sioux City, IA

Key Features:

  • 10,069 L.F. of 24” and 30” gravity sewer
  • 4,628 feet of twin 10” force main
  • VFD pump controls
  • Flow Meter Installation

Key Experience:

  • Lift Station Improvements
  • Large diameter sewer design
  • Gravity siphon design
  • Directional bore sewer installation
  • Low water crossing

SE Morningside Sanitary Sewer

The City of Sioux City needed a large diameter trunk sewer to carry flows from new residential development and future development on the east side of town to the existing Southeast Morningside Lift Station. The upper end of this gravity sewer will also serve as new discharge point for twin 10″ sanitary force main installed from the Whispering Creek Lift Station. The gravity sewer starts at the Southeast Morningside Lift Station and runs south and east along an existing drainage way and then north in an abandoned railroad right of way to Old Highway 141. The gravity sewer continues north through portions of the new Eagle Ridge and Whispering View Subdivisions. The Whispering Creek Lift Station was retrofitted with VFD pump controls to allow for more efficient pump operation and a new flow meter was installed to meet current DNR requirements. Force main installation included a 1,000 foot long directional bore of the twin 10″ force mains under portions of the Whispering Creek Golf Course. A granular access road was constructed along much of the gravity sewer to provide for maintenance access.

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Site Development

DGR Engineering (DGR) worked with the City and the project architect for all aspects of the project including topographic survey, site design, construction survey, construction observation and administration.

Site Development
Sioux City, Iowa

Sanitary Sewer Rehabilitation

The project was bid and came in under budget. Manhole lids were raised to provide better access in some areas, and rehabilitation of the sewer system was completed to give another 50 years of life to the City’s much-needed infrastructure.

Sanitary Sewer Rehabilitation
Rembrandt, IA

Wastewater Treatment Facility

MBBR technology was chosen based on cost, operational flexibility and most importantly, limited land availability.

Wastewater Treatment Facility
Sanborn, IA

Floodplain Analysis

DGR employed a Geographic Information System (GIS) in conjunction with the U.S. Army Corps of Engineers to first determine the 100-year flood elevations and delineate the floodway boundaries.

Floodplain Analysis
Sutherland, IA

Distribution Conversion

Due to concerns with the age and condition of the structures, along with safety clearances to energized equipment and conductors, a project was undertaken to replace the old infrastructure with new underground lines and associated padmount equipment.

Distribution Conversion
Redwood Falls, MN

Street & Utility Improvements

Morningside Avenue was reconstructed totaling approximately 1,300 linear feet. The project included new sanitary sewer, water main, storm sewer, fiber conduits, decorative street lighting, and 9-inch concrete paving with colored concrete sidewalks.

Street & Utility Improvements
Sioux City, IA