WESTERN AVENUE DRAINAGE PROJECT
REDUCES FLOODING ISSUES IN SIOUX FALLS
City of Sioux Falls, SD
- Combination of improvements within basin to reduce flooding
- Limit flooding for adjacent properties
- Reestablish natural
- Utilized easements for
surface drainage and underground piping
through existing properties
- Coordinated with USACE to modify an existing weir within the Big Sioux
DGR Engineering (DGR) was hired by the City of Sioux Falls in 2016 to analyze and model 120 acres within the City that had experienced multiple flooding events in the recent past. Rain events had caused streets to flood which impacted adjacent private properties.
There was a natural drainage path that was filled in as the area was developed, and the existing storm drainage piping within the right-of-way was inadequate to handle the necessary flows. Furthermore, when the Big Sioux Levee system was built, the outlet for the drainage basin was controlled by piping and weirs, further limiting the discharge.
DGR presented multiple alternatives within the drainage analysis and ultimately the City decided to move forward with three options to improve the drainage and reduce the flood threat.
These options included: 1) Re-routing water further up the basin (at the corner of 46th Street and S. Western Ave.) to utilize existing piping that wasn’t flowing at full capacity. 2) Adding an overland flow channel and underground piping relief on the existing system between properties
(along S. Western Ave, north of 50th Street) to limit street and building flooding. 3) Modifying an existing weir within the Big Sioux Levee System to lower the maximum water elevation within the basin during rain events.
This combination of improvements and restoration of the natural drainage path provides a relief for flood water during rain events, thus reducing the impact to the adjacent properties.
- Electrical Power
DGR engineers helped L&O Power Cooperative improve communications on its electric transmission system using existing transmission lines, fiber and underground fiber line.
Rock Rapids, IA
Treatment Plant & Well Exploration
DGR Engineering worked closely with OCRWS to design a new Water Treatment Plant to target iron and manganese removal from a shallow groundwater source near the site.
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
Wastewater Treatment Facility
The new plant, rated for 5.3 million gallons per day (MGD) peak day, doubles the capacity of its predecessor.
Planning started with site plan design for the new facility to offer maximum exposure to traffic on Highway 75.
Rock Rapids, IA