Client:
City of Hull

Hull, IA

Key Features:

  • Two multi-cell Submerged Aerated Gravel Reactor (SAGR) cells for ammonia removal
  • Ultraviolet disinfection for E. Coli removal
  • System designed to operate effectively during winter months.

Key Experience:

  • The system design utilized existing treatment components to save the City construction cost.
  • The components are designed to work during cold winter months while minimizing operator time on site.

Wastewater Treatment Facility

Designed a SAGR system to be utilized as a polishing step following the City’s aerated lagoon system. The system includes a synthetic liner, aeration lines, rock media, an insulating mulch layer, control structures, and related piping.

Following the SAGR system, a UV disinfection system eliminates bacteria. Also designed a standby generator and related system controls for the SAGR and UV equipment.

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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