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
The City of Sioux City needed a large diameter trunk sewer to carry flows from new residential development and future development on the east side of town to the existing Southeast Morningside Lift Station.
Sioux City, IA
Street Lighting Improvements
The City replaced the old lighting system with a modern LED based system to reduce operating cost. Decorative style lighting units were used, which enhanced the aesthetics of the downtown area, and match what had been utilized in other parts of the city.
Pump Station & Storage Reservoirs
The new Edgerton Pump Station (EPS) was constructed to facilitate bringing purchased water from Lewis & Clark Regional Water System (L&C) to the LPRW system.
Box Culvert Bridge Replacement
DGR Engineering worked with the SWO and BIA staff to design an economically feasible replacement for the deficient bridge structure.
Northeast South Dakota
New Airport Development
DGR led the design and construction phase engineering for the development of a new $30 million airport. Tasks included all phases of design and construction engineering activities.
Sioux County, IA
Turbine Control System Upgrade
This project included full removal and replacement of the existing control panels within the turbine building control room.