Client:
Sioux City School District

Sioux City, IA

Key Features:

  • Maximize usable space in a tight area with steep terrain (26.5 feet of elevation difference across the site)

Key Experience:

  • High level of project coordination with entities involved, included school, city, neighbors, architects, engineers, private utility companies and contractors to layout and complete a schedule for a multi-year, multi-stage project with three bid packages within a proposed budget
  • Reconstruct surrounding streets during site work

Site Development

Bid Package 1 (BP1) included building and site demolition, utilities and grading which included over-excavation and re-compaction of soils below proposed building footings and foundation, retaining walls and paving. Also during this time, Jennings Street, 31st Street and Jones Street, which were similar in age to the existing school, were reconstructed in a partnership agreement with the City of Sioux City. Along with street reconstruction, the utilities were replaced. A total of approximately 1,675 linear feet of street including four intersections plus 200 linear feet of relocated City alley through the site was replaced. Work on BP1 was completed in fall of 2017.

Bid Package 2 (BP2) was also completed in year 2016 in coordination with BP1 and included two site geothermal well fields totaling 230 wells at approximately 300 feet deep. The geothermal well field will heat and cool the new school and has been the practice with all the new elementary schools in Sioux City since 2007.

Finally, Bid Package 3 (BP3) included the building construction with remaining site work (final grading, sidewalks, fencing, etc.) adjacent to the building.

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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