City of Sioux City
Sioux City, Iowa
- Developing a site for a large 100,000 sq ft multi-use arena with a number of existing site constraints (gas, electrical and sanitary sewer easements, and street right-of-way that splits the site
- Parking lot design to utilize irregularly shaped open areas
- Site design to utilize irregularly shaped areas
- Utilizing existing storm sewer outfalls and designing a site storm sewer system that divided drainage areas based upon existing outfall capacities
- Designing pedestrian routes from multiple parking lots to front entrance of building
- Project coordination with different entities involved
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. With the goal of limiting impacts to the Floyd River, existing storm sewer outfalls from previous site developments were utilized along with bio-retention cells placed throughout the parking lots to improve storm water runoff quality. Parking lot and building designs were specifically matched to the irregular site shape for efficient use of the space. A parking lot along the south side of the building will provide for a shared parking option with future developments.
Site elevations were set to provide adequate surface drainage as well as pedestrian-friendly grades for building visitors and event goers. The final design utilizes the city’s proposed recreational trail adjacent to the site which will provide a pedestrian path to the building from the north parking lot. Truck turning movement modeling was used in parking lot design to provide for semitrailer routes around the building and to the proposed recessed loading docks.
DGR coordinated closely with the project’s landscape designer to develop workable solutions for complex areas of the design including acceptable height and placement of the landscape wall, as well as front entrance features which needed to allow adequate sight distance for the main parking lot and building driveway.
- Electrical Power
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.
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.
Wastewater Treatment Facility
MBBR technology was chosen based on cost, operational flexibility and most importantly, limited land availability.
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.
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.
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.
Sioux City, IA