Our Work
- All
- Aviation
- Civil
- Electrical Power
- Survey
- Water & Wastewater
Substation Construction
DGR assisted SMU in all aspects of the project, from initial evaluation, to design and financing, through final construction.
Stanhope, IA
Airport Electrical Expertise
DGR Engineering collaborated with a long-standing airport engineering partner at the Brookings, SD Regional Airport to provide unique airport-electrical expertise and designed the $2.3 million airport electrical and instrument landing system.
Brookings, SD
Campus Improvements
DGR worked with college staff to improve the surface drainage surrounding the East Campus apartments as well as enhancing the Campus Green Space.
Sioux Center, IA
Site Design, Survey & Staking
DGR performed the site design as well as the topographic surveying and construction staking of new Kuyper Residence Hall on the campus of Dordt College.
Sioux Center, IA
Site Development
Coordination between multiple entities to create a mutually satisfying layout of buildings, parking area, utilities and street access was a main element of the planning process.
Sioux City, IA
Mainline Distribution Circuits
The project included the construction of three new mainline 13.8 kV circuits on the City’s distribution system to increase capacity and reliability.
Sioux Falls, SD
Wastewater Treatment Facility
City of Orange City, IA prepared for the future by adding a mechanical treatment facility to meet both capacity and compliance.
Orange City, IA
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 Water Distribution System
The City’s residents enjoy high quality water that comes to them in a new and reliable distribution system.
Revere, MN
Broadway Generation Plant
The project included full services for the construction of a new generation plant.
St. Peter, MN
Parking Upgrade
Upgrading Parking Lots 5 and 6 enhances the daily experience for students, faculty and staff.
Sioux City, IA
Arc Flash Hazard Study
DGR provided a detailed arc flash hazard study for the electric distribution system for Milford Municipal Utilities.
Milford Municipal Utilities
Athletic Field Site Design
Project planning by Augustana University and DGR Engineering to upgrade Bowden Field to a championship level began in 2018, and eventually culminated in a new facility which opened for the 2023 season.
Sioux Falls, SD
Water Supply Development
DGR Engineering worked with LCRWS to diversify their water supply options for their future growth.
Harrisburg, SD
Street and Utility Improvements
The City of Irene invested tax dollars and utility fees into significant reconstruction work, and successfully obtained a funding package which covered 74% of project costs.
Irene, SD
Water Main Replacement
Work included water main replacement, sanitary manhole repair, replacement of surfacing over trenches, and boulevard restoration.
Sioux Falls, SD
Double Circuit Line
The project included full services for a 1.7 mile, double-circuit 115 kV line.
Marshall, MN
Hospital Site Development
Sioux Center Community Hospital relocated their hospital facility, which required the completion of several smaller projects in conjunction with the overall hospital construction project.
Sioux Center, IA
Water Main Extension
This project included water main installation, asphalt removal and replacement, and site restoration and grading.
Sioux Falls, SD
Water System Expansion
Tremendous demand for new service connections made this expansion project the largest ever undertaken by Kingbrook Rural Water, Inc.
Southeastern SD
Water Treatment Plant
DGR Engineering worked with Clay Rural Water System to construct a reverse osmosis water treatment plant to take water with raw water combined radium 226 + 228 of 12.4 pCi/L down to below detection limits.
North Sioux City, SD
Low Head Dam Design & Survey
DGR performed the topographic survey as well as the design of the low head dam.
Sioux Center, IA
Site Survey & Development
DGR performed the boundary and topographic surveying as well as the planning and site design of new Kids Club facility.
Rock Rapids, IA
Wastewater Treatment Facility
The City of Huron planned for future needs with Wastewater Treatment Facility Expansion.
Huron, SD
Wastewater Treatment Facility
LemTec™ system allows the City to meet more stringent permit limits utilizing a robust, easy-to-operate, affordable technology.
Schleswig, IA
Site Development
Hendricks Community Hospital added to their hospital facility, which required the completion of several smaller projects in conjunction with the overall construction project.
Hendricks, MN
Runway Rehab / Apron Expansion
This multi-phase project included apron expansion, runway rehabilitation, hangar area expansion, as well as design and construction services for a new runway and taxiway.
Luverne, MN
Tracks & Sports Complexes
DGR has performed the planning and design of multiple Athletic Tracks and Sports Complexes for several communities in the region. The competition facilities are used by little leaguers up to NAIA college events.
Numerous Locations
Commercial Park Development
46-acre Highway Commercial Development fronting U.S. Highway 75.
Sioux Center, IA
Street & Utility Improvements
This project consisted of 3,700 L.F. of street improvements on 15th Street from Old Highway 77 to Clark Avenue in Dell Rapids. Also included in this project were improvements to the water main, sanitary sewer and storm sewer in conjunction with street improvements.
Dell Rapids, SD
Electrical Generation Plant
The project included full services for the construction of a new generation plant and substation.
Madison, SD
Recreational Trail
Five-phase, 7.5 mile recreational trail around the city of Luverne.
Luverne, MN
Pond Closure
Assisted the City of Luverne in abandoning the industrial wastewater treatment facility formerly owned by Iowa Beef Producers.
Luverne, MN
River Crossing/Street Improvements
This project consisted of 4,200 L.F. of street improvements and 4,400 feet of water main, 2,000 feet of sanitary sewer, and two directionally drilled river crossings approximately 350 feet each.
Dell Rapids, SD
Street Improvements
The City selected DGR to reconstruct water mains, sanitary and storm sewer and pavement for their typical recurring infrastructure project.
Windom, MN
Street Improvements
DGR assisted the City in coordinating this major infrastructure overhaul in the heart of the town.
Hendricks, MN
Site Development
Planning started with site plan design for the new facility to offer maximum exposure to traffic on Highway 75.
Rock Rapids, IA
Downtown Street Reconstruction
The City of Orange City adopted a long-term plan to replace the streets in the downtown business and government district.
Orange City, IA
Neighborhood Reconstruction
Health, safety and public welfare were all improved by this project.
Brandon, SD
Ground Storage Reservoir
Construction of a 500,000 gallon prestressed concrete ground storage reservoir, site work and site piping.
Orange City, IA
Water System Improvements
The water tower serves as both a critical piece of Sheldon’s drinking water infrastructure and as a welcome beacon for the City.
Sheldon, IA
Street & Utility Improvements
These projects encompassed eight downtown alley blocks over a single construction season.
Madison, SD
Substation Expansion
DGR Engineering designed a joint 161 kV project with OPU and SMMPA, OPU’s power supplier.
West Owatonna, MN
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.
Redwood Falls, MN
Water Treatment Plant Expansion
Construction of a water treatment plant expansion of 1200 gpm capacity, filter cells; masonry building; yard and process piping; line shaft turbine high service and backwash pumps; horizontal split case transfer pumps; HVAC; electrical and control; site work and miscellaneous appurtenant work.
Estherville, IA
Sewer Extension
The SE Sanitary Sewer Extension project provided sanitary sewer service to a previously un-serviced area southeast of Dell Rapids, SD
Dell Rapids, SD
Street and Utility Improvements
The City of Hawarden partnered with DGR Engineering to develop a comprehensive approach for improving Avenue L for the long-term benefit of the community.
Hawarden, IA
New Water Treatment Plant
New water treatment plant for SLRW meets growth and water quality needs with innovative treatment plant design.
Beresford, SD
Water Treatment Plant
The new facility has become Red Rock’s primary water source.
Jeffers, MN
Wastewater Treatment Facility (SBR)
The new SBR system utilizes the existing aeration lagoon for equalization and another lagoon cell for sludge storage, which reduced the cost of the project for the City and provided more operational flexibility.
Dell Rapids, SD
Sanitary Sewer
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 & Utility Improvements
The City selected DGR to reconstruct water mains, sanitary and storm sewer and the highway pavement on Jefferson Street and TH 68.
Minneota, MN
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.
Southwest Minnesota
Recreational Trail
This project consisted of one and a half miles of 8’ wide recreational trail along the Big Sioux River and in the City Park in Dell Rapids, South Dakota.
Dell Rapids, SD
Parking Lot, Booth Improvements
Site improvements including ticket booth, parking lot, concourse area, sidewalk/trails, and drainage
Sioux City, IA
Site Development
Sanford Hospitals of Sioux Falls, SD built a new Luverne hospital, which required the completion of several smaller projects.
Luverne, MN
Wastewater Treatment Facility
MBBR technology was chosen based on cost, operational flexibility and most importantly, limited land availability.
Sanborn, IA
Sandness Raw Water Main Project
DGR Engineering designed 27 miles of 12” – 24”, and used their knowledge of cost effective rural construction to save Marshall Municipal Utilities millions of dollars in construction costs, and providing capacity to deliver over 4 million gallons of additional water each day.
Marshall, MN
Infrastructure Improvements
The infrastructure investment will significantly improve and benefit the community and all residents with many years ahead with reliable infrastructure.
Chancellor, SD
Wastewater Treatment Facility
Designed a SAGR system to be utilized as a polishing step following the City’s aerated lagoon system. The system includes a synthetic liner, aeration lines, rock media, an insulating mulch layer, control structures, and related piping.
Hull, IA
Digester Improvements Project
Analyzed digester cover and mixing system alternatives due to condition of existing plant equipment. Selected cover and mixing system to best fit the City’s request for potential future digester gas re-use to reduce plant operational expenses.
Estherville, IA
Water Main Development
This project consisted of installing approximately 4,500 feet of 16” DIP water transmission main on Six Mile Road between 10th Street and 26th Street in Sioux Falls, SD.
Sioux Falls, SD
Neighborhood Revitalization
The Southeast Infrastructure Improvements project revitalized the neighborhood by replacing dilapidated infrastructure with new, dependable infrastructure.
Dell Rapids, SD
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
Turbine Control System Upgrade
This project included full removal and replacement of the existing control panels within the turbine building control room.
Marshall, MN
Land Acquisition Services
DGR Engineering offers a “one-stop shop” for planning, designing, permitting, right-of-way and easement acquisition services, and construction administration needs.
Site Design for Temporary Housing
Designed and implemented the necessary infrastructure to support temporary housing at two sites following severe flooding.
Rock Valley, IA
Site Design
Projects included were the expansion of the existing convention center, construction of a 150-room hotel, as well as construction of a 140-space parking deck.
Sioux City, IA
Site Development
Site improvements included demolition and removals, grading, utilities, paving of parking lots, retaining walls, sidewalks and playgrounds.
Sioux City, IA
New Water Treatment Plant
New Water Treatment Plant delivers higher quality and more economical water.
Osgood, IA
Street Reconstruction
This project involved the reconstruction of approximately 8,500 linear feet of residential street including replacement of all utilities.
Sioux City, IA
Search for High Capacity Wells
OCRWS rapid growth in water demands had pushed their existing wells to the limit, and it was now time to start looking for additional water supply.
Sutherland, IA
Ground Storage Reservoir
The ground storage reservoir is a critical component of the water treatment process, allowing surge capacity between the filtration process and the softening system.
Estherville, IA
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
“Circuit 13” Underground Power Line
Circuit 13 is a six-mile long underground power line project connecting critical facilities to the power grid, with built-in backup power for reliability.
Sioux Falls, SD
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.
Rembrandt, IA
Sludge Handling & Facility Expansion
In addition to doubling the capacity of the lift station by replacing the existing 7.5HP pumps with 15HP pumps, this project also addressed many deficiencies in the sludge collection, processing, and disposal operations.
Sanborn, IA
Connection to L-P Rural Water
DGR completed a preliminary engineering report that met all the requirements for Rural Development.
Edgerton, MN
Drainage Channel Improvements
DGR designed the channel to handle more capacity and protect the area from future flooding, which required making the channel deeper and wider.
Sioux Falls, SD
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.
Hawarden, 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.
Sutherland, IA
Traffic Roundabout
Sioux City’s first roundabout was designed to improve traffic flow and safety at a previously congested five-legged intersection.
Sioux City, IA
Mainline Distribution Circuits
The project included the construction of three new mainline 13.8 kV circuits on the City’s distribution system to increase capacity and reliability.
Sioux Falls, SD
Water Pipeline Construction
The North Core Pipeline project consisted of approximately 70 miles of pipeline from near Ft. Pierre to Philip, four ground storage reservoirs, and four pump stations.
Murdo, SD
Force Main Replacement
Designed a replacement force main that was installed under Split Rock Creek, and at the same time, a new 16” water main was designed to replace the existing water line to facilitate future development needs.
Brandon, SD
Water Storage Tank Coating
Removal and abatement of lead-based paint and intricate logo and logo lighting system design.
Luverne, MN
Pipeline Improvements
56 mile pipeline project was designed, permitted, bid, installed, and started up in less than two years from the project’s inception.
May City, IA
Water Storage Tank Repainting
In just under four months, the tank was drained, sandblasted, and nearly 1,900 gallons of paint applied to over 100,000 square feet of surface area. The tank was then returned to service.
Sioux City, IA
Utility & Street Improvements
This project consists of approximately 1,500 feet of 6” water main replacement and 1,400 feet of 8” sewer replacement.
Dell Rapids, SD
Street Reconstruction
A multi-phase, multiple-year project to replace paving and aging utilities, install new sidewalks, decorative street lights and traffic signals.
Sioux City, IA
New Track and Football Facility
Numerous design options were explored for this project in Wagner.
Wagner, SD
Airport Reconstruction
Full redesign of runway, taxiway, turnarounds and apron in compliance with FAA standards while optimizing pavement strength, drainage and grading for long-term performance.
Springfield, SD
Wastewater Treatment Facility
The new plant, rated for 5.3 million gallons per day (MGD) peak day, doubles the capacity of its predecessor.
Sheldon, IA
Electrical Distribution Conversion
The project included full services for the conversion of the utility’s distribution circuitry from overhead to underground. The conversion was completed in several project phases as part of a multi-year process.
Marshall Municipal Utilities
Subdivision Development
The addition of these new lots gave the City of Minneota opportunity for growth and an increased tax base.
Minneota, MN
Water Source Development
DGR and Red Rock Rural Water System teamed up with POET to perform a program of exploratory drilling, test pumping and well field development. Designed three production wells capable of supplying 1.4 MGD to the ethanol plant and 9 miles of 10” diameter raw water main.
Jeffers, MN
Drainage Project
DGR Engineering was hired to analyze and model 120 acres within the city that had experienced multiple flooding events in the recent past.
Sioux Falls, SD
Street Reconstruction
This project included new utilities (sanitary sewer, storm sewer and water main), new sidewalks, paving and traffic signals.
Sioux City, IA
Site Development, Utility Impr.
A multi-phase infrastructure improvements plan was developed for the City of Alton.
Alton, IA
Economical Filter Rehabilitation
Economical filter rehabilitation avoids costly plant expansion for OCRWS.
Keystone Transmission Line
The project included full services for 58 miles of new 115 kV line and 5 miles of new 69 kV line.
Madison, SD
Street & Utility Improvements
This project consisted of street improvements for the downtown business district in Dell Rapids. Also included in this project were improvements to the water main, sanitary sewer and storm sewer in conjunction with street improvements.
Dell Rapids, SD
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.
Northwest IA
Street & Utility Improvements
This large scale infrastructure project improved the route in the southern portion of the community.
Dell Rapids, SD
Upgrading Communications
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
Track & Field Facility Improvements
DGR designed the track and field layout and improved drainage for the track and adjacent areas.
Parkston, SD
Airport Box Hangar
New hangar provides four additional aircraft units. Project also included asphalt taxilane.
Luverne, MN
Water Treatment Plant Improvement
The improvements delivered a cost‑effective, long‑term solution that enhanced reliability, met regulatory requirements, and advanced system capacity goals.
Northwest Iowa
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.
Sioux City, Iowa
Fuel System, Terminal, Hangars
Design and construction services for support facilities at the new Sioux County Regional Airport.
Sioux County, IA
Control Systems & Automation
Our team of experts can cater custom SCADA solutions for any size project.
Coordination Study
DGR provided a device by device coordination study for the Willmar Municipal Utilities electric distribution system.
Willmar Municipal Utilities
Rock Riffle Dam
Rock riffle dam provides a cost-effective way to recharge aquifer water levels.
Avoca, IA
Apron Expansion Lighting
The goal of this project was to achieve adequate lighting levels for air cargo operations at the expanded cargo apron facilities.
Sioux Falls, SD
Industrial Area Revitalization
This comprehensive project enhanced utility and roadway infrastructure in Salem’s industrial area.
Salem, SD
Site Development
DGR performed the boundary and topographic surveying as well as the site design of school building addition as a subconsultant.
Sioux Center, IA
Low Pressure Collection System
Analyzed collection and treatment alternatives. Designed a septic tank effluent pump (STEP) system for Superior’s residents.
Superior, IA