Our Work

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Street Improvements

DGR assisted the City in coordinating this major infrastructure overhaul in the heart of the town.

Street Improvements
Hendricks, MN

Water Main Replacement

Work included water main replacement, sanitary manhole repair, replacement of surfacing over trenches, and boulevard restoration.

Water Main Replacement
Sioux Falls, SD

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.

Sludge Handling & Facility Expansion
Sanborn, IA

Low Head Dam Design & Survey

DGR performed the topographic survey as well as the design of the low head dam.

Low Head Dam Design & Survey
Sioux Center, IA

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.

Runway Rehab / Apron Expansion
Luverne, MN

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.

New Airport Development
Sioux County, IA

New Water Treatment Plant

New Water Treatment Plant delivers higher quality and more economical water.

New Water Treatment Plant
Osgood, IA

Ground Storage Reservoir

Construction of a 500,000 gallon prestressed concrete ground storage reservoir, site work and site piping.

Ground Storage Reservoir
Orange City, IA

Alley Surfacing

This pair of projects encompassed eight downtown alley blocks over two construction contracts in consecutive years.

Alley Surfacing
Madison, SD

Turbine Control System Upgrade

This project included full removal and replacement of the existing control panels within the turbine building control room.

Turbine Control System Upgrade
Marshall, MN

Arc Flash Hazard Study

DGR provided a detailed arc flash hazard study for the electric distribution system for Milford Municipal Utilities.

Arc Flash Hazard Study
Milford Municipal Utilities

Wastewater Treatment Facility

LemTec™ system allows the City to meet more stringent permit limits utilizing a robust, easy-to-operate, affordable technology.

Wastewater Treatment Facility
Schleswig, IA

Keystone Transmission Line

The project included full services for 58 miles of new 115 kV line and 5 miles of new 69 kV line.

Keystone Transmission Line
Madison, SD

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. 

Recreational Trail
Dell Rapids, 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.

Street and Utility Improvements
Irene, SD

Street Improvements

The City selected DGR to reconstruct water mains, sanitary and storm sewer and pavement for their typical recurring infrastructure project.

Street Improvements
Windom, MN

Street Reconstruction

This project involved the reconstruction of approximately 8,500 linear feet of residential street including replacement of all utilities.

Street Reconstruction
Sioux City, 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.

Downtown Street Reconstruction
Orange City, IA

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

Substation Expansion

DGR Engineering designed a joint 161 kV project with OPU and SMMPA, OPU’s power supplier.

Substation Expansion
West Owatonna, MN

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.

Digester Improvements Project
Estherville, IA

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.

Campus Improvements
Sioux Center, IA

Line Tap

The project included full services for a 1.4 mile 115 kV line.

Line Tap
Benson, 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. 

Pump Station & Storage Reservoirs
Southwest Minnesota

Water Supply Development

DGR Engineering worked with LCRWS to diversify their water supply options for their future growth. 

Water Supply Development
Harrisburg, SD

Runway & Taxiway Improvements

The project included coordination with the watershed district, environmental, land acquisition, and staging issues. DGR worked with the City, agencies and land owners to restore relationships and achieve a successful project.

Runway & Taxiway Improvements
Hector, MN

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.

Street Lighting Improvements
Hawarden, 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.

Site Design, Survey & Staking
Sioux Center, IA

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. 

Pipeline Construction
Murdo, SD

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.

Water Treatment Plant Expansion
Estherville, IA

Wastewater Treatment Facility

City of Orange City, IA prepared for the future by adding a mechanical treatment facility to meet both capacity and compliance.

Wastewater Treatment Facility
Orange City, IA

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.

Drainage Project
Sioux Falls, SD

Street & Utility Improvements

This project encompassed eight downtown alley blocks over a single construction season.

Street & Utility Improvements
Madison, 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.

Wastewater Treatment Facility
Hull, IA

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.

Sanitary Sewer
Sioux City, IA

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.

Wastewater Treatment Facility (SBR)
Dell Rapids, SD

Street Reconstruction

This project included new utilities (sanitary sewer, storm sewer and water main), new sidewalks, paving and traffic signals.

Street Reconstruction
Sioux City, 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.

Site Design
Sioux City, IA

Site Development, Utility Improvements

A multi-phase plan for infrastructure projects was developed for the City of Alton.

Site Development, Utility Improvements
Alton, IA

Recreational Trail System

Two-phase, 3.16 mile recreational trail on the north and west side of Luverne.

Recreational Trail System
City of Luverne, MN

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.

Site Development
Sioux City, IA

New Water Distribution System

The City’s residents enjoy high quality water that comes to them in a new and reliable distribution system.

New Water Distribution System
Revere, MN

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

Box Culvert Bridge Replacement

DGR Engineering worked with the SWO and BIA staff to design an economically feasible replacement for the deficient bridge structure.

Box Culvert Bridge Replacement
Northeast South Dakota

Pipeline Improvements

56 mile pipeline project was designed, permitted, bid, installed, and started up in less than two years from the project’s inception.

Pipeline Improvements
May City, 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.

Floodplain Analysis
Sutherland, IA

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.

Sanitary Sewer Rehabilitation
Rembrandt, IA

Substation Construction

DGR assisted SMU in all aspects of the project, from initial evaluation, to design and financing, through final construction.

Substation Construction
Stanhope, IA

Wastewater Treatment Facility

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

Wastewater Treatment Facility
Sheldon, 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.

Mainline Distribution Circuits
Sioux Falls, SD

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. 

Search for High Capacity Wells
Sutherland, IA

Double Circuit Line

The  project included full services for a 1.7 mile, double-circuit 115 kV line. 

Double Circuit Line
Marshall Municipal Utilities

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.

Force Main Replacement
Brandon, SD

Site Development

Sanford Hospitals of Sioux Falls, SD built a new Luverne hospital, which required the completion of several smaller projects.

Site Development
Luverne, MN

Water System Expansion

Tremendous demand for new service connections made this expansion project the largest ever undertaken by Kingbrook Rural Water, Inc.

Water System Expansion
Southeastern SD

Fuel System, Terminal, Hangars

Design and construction services for support facilities at the new Sioux County Regional Airport. 

Fuel System, Terminal, Hangars
Sioux County, IA

Runway/Taxiway/Electrical Systems

DGR Engineering collaborated with a long-standing airport engineering partner at the Watertown, SD Regional Airport to provide electrical design and construction services for the airport including runway and taxiway lights, lighted signs and airport electrical systems upgrades.

Runway/Taxiway/Electrical Systems
Watertown, SD

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.

Site Development
Hendricks, MN

Site Development

DGR performed the boundary and topographic surveying as well as the site design of school building addition as a subconsultant.

Site Development
Sioux Center, IA

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.

Tracks & Sports Complexes
Numerous Locations

Commercial Park Development

46-acre Highway Commercial Development fronting U.S. Highway 75.

Commercial Park Development
Sioux Center, IA

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.

Upgrading Communications
Rock Rapids, IA

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. 

River Crossing/Street Improvements
Dell Rapids, SD

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.

Hospital Site Development
Sioux Center, IA

Pavement/Utility Improvements

The City selected DGR to reconstruct water mains, sanitary and storm sewer and the highway pavement on Jefferson Street and TH 68.

Pavement/Utility Improvements
Minneota, MN

Site Survey & Development

DGR performed the boundary and topographic surveying as well as the planning and site design of new Kids Club facility. 

Site Survey & Development
Rock Rapids, IA

GIS Mapping

DGR developed an electric GIS mapping system for the City of Madison, South Dakota. The project entailed obtaining high resolution, geo-referenced aerial imagery to serve as a base background to the system.

GIS Mapping
Madison, SD

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.

Water Source Development
Jeffers, MN

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.

Treatment Plant & Well Exploration
Northwest 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. 

Mainline Distribution Circuits
Sioux Falls, SD

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.

Sandness Raw Water Main Project
Marshall, MN

Lighting & Signing Project

DGR Engineering collaborated with a local engineering partner at the Ankeny, IA Regional Airport to provide electrical design and construction services including runway and taxiway lights, lighting signs and navigational aids including Precision Approach Path Indicators.

Lighting & Signing Project
Ankeny, IA

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. 

Street & Utility Improvements
Dell Rapids, SD

Water Main Extension

This project included water main installation, asphalt removal and replacement, and site restoration and grading. 

Water Main Extension
Sioux Falls, SD

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.

Site Development
Sioux City, Iowa

Broadway Generation Plant

The project included full services for the construction of a new generation plant.

Broadway Generation Plant
St. Peter, MN

Parking Lot, Booth Improvements

Site improvements including ticket booth, parking lot, concourse area, sidewalk/trails, and drainage

Parking Lot, Booth Improvements
Sioux City, IA

Generating Plant

The project included full services for the construction of a new generation plant and substation.

Generating Plant
Madison, SD

Pond Closure

Assisted the City of Luverne in abandoning the industrial wastewater treatment facility formerly owned by Iowa Beef Producers.

Pond Closure
Luverne, MN

Neighborhood Reconstruction

Health, safety and public welfare were all improved by this project.

Neighborhood Reconstruction
Brandon, SD

Lift Station, Control Panel, Valve Vault

The SE Sanitary Sewer Extension project provided sanitary sewer service to a previously un-serviced area southeast of Dell Rapids, SD.

Lift Station, Control Panel, Valve Vault
Dell Rapids, SD

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.

Water Storage Tank Repainting
Sioux City, 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.

Ground Storage Reservoir
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.

Water Main Development
Sioux Falls, 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.

Water Treatment Plant
North Sioux City, SD

Street Reconstruction

A multi-phase, multiple-year project to replace paving and aging utilities, install new sidewalks, decorative street lights and traffic signals.

Street Reconstruction
Sioux City, IA

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
Redwood Falls, MN

Site Development

Site improvements included demolition and removals, grading, utilities, paving of parking lots, retaining walls, sidewalks and playgrounds.

Site Development
Sioux City, IA

Subdivision Development

The addition of these new lots gave the City of Minneota opportunity for growth and an increased tax base.

Subdivision Development
Minneota, MN

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.

Airport Electrical Expertise
Brookings, SD

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.

Street & Utility Improvements
Dell Rapids, SD

Low Pressure Collection System

Analyzed collection and treatment alternatives. Designed a septic tank effluent pump (STEP) system for Superior’s residents. 

Low Pressure Collection System
Superior, IA

Lift Station, Control Panel, Valve Vault

The SE Sanitary Sewer Extension project provided sanitary sewer service to a previously un-serviced area southeast of Dell Rapids, SD

Lift Station, Control Panel, Valve Vault
Dell Rapids, SD

Coordination Study

DGR provided a device by device coordination study for the Willmar Municipal Utilities electric distribution system.

Coordination Study
Willmar Municipal Utilities

Connection to L-P Rural Water

DGR completed a preliminary engineering report that met all the requirements for Rural Development. 

Connection to L-P Rural Water
Edgerton, MN

Utility & Street Improvements

This project consists of approximately 1,500 feet of 6” water main replacement and 1,400 feet of 8” sewer replacement.

Utility & Street Improvements
Dell Rapids, SD

Wastewater Treatment Facility

MBBR technology was chosen based on cost, operational flexibility and most importantly, limited land availability.

Wastewater Treatment Facility
Sanborn, IA

Substation Conversion

DGR provided design, procurement, construction administration services for conversion of the existing substation needed to accommodate generation interconnection from the new Red Rock Hydro Project.  Project increased area transmission reliability and local load serving capability. 

Substation Conversion
Pella, IA

Track & Field Facility Improvements

DGR designed the track and field layout and improved drainage for the track and adjacent areas.

Track & Field Facility Improvements
Parkston, SD

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.

Electrical Distribution Conversion
Marshall Municipal Utilities

Site Development

DGR performed the boundary and topographic surveying as well as the site design of school building addition as a subconsultant.

Site Development
Rock Rapids, IA