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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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
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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
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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

Wastewater Treatment Facility (SBR)

The City ultimately determined a flow-through style SBR system to be the preferred choice based on the selection criteria and the ability to meet anticipated permit limits.

Wastewater Treatment Facility (SBR)
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Site Development

Planning started with site plan design for the new facility to offer maximum exposure to traffic on Highway 75.

Site Development
Rock Rapids, IA

Wastewater Treatment Facility (SBR)

The new plant, rated for 5.3 million gallons per day (MGD) peak day, doubles the capacity of its predecessor.

Wastewater Treatment Facility (SBR)
Sheldon, IA