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Neighborhood Revitalization

April 12, 2024

Neighborhood Revitalization

Paved Asphalt Street

Neighborhood Revitalization

Infrastructure Replacement in Dell Rapids

Project Owner:
City of Dell Rapids, SD

Unique Project Challenges:

  • Phasing of construction to minimize disturbance to residents in project area
  • Coordination and communication with 200-plus residents, property owners, and business owners impacted
  • Removal of over 3,000 cubic yards of quartzite bedrock for utility replacement, which often
    required blasting
  • Relocating the water mains that were in the alleys, which involved directional drilling of service lines and backyard connections
  • Replacement of a large box culvert originally built from quartzite rock, which involved both precast and cast-in-place concrete
  • New ADA-compliant sidewalks and curb ramps throughout the project, including many areas that did not have sidewalks before
  • Improving the drainage through the project area while matching into existing driveways, which required extensive design effort

Key Features:

  • Nearly 30 city blocks of total infrastructure replacement throughout residential neighborhood
  • Replacement of existing sanitary sewer, water, and storm sewer utilities at four railroad crossings
  • Two construction contracts, combined total cost of more than $8.5 million
  • Funding for the project included:
    - $600,000 SDDOT Community   Access Grant
    - Grants and loans through SRF
      programs
    - City of Dell Rapids local funds
civil collage
Storm Sewer Near Box Culvert
culvert replacement collage
Concrete Paving 2
sfo quote

Replacement of deteriorating infrastructure has been a high priority for the City of Dell Rapids for many years, and in 2016 the City decided to take on a neighborhood reconstruction project that would be their largest yet. When it came to determining the area of town that needed the improvements the most, it did not take long for the answer to become clear. In the years prior, the City Public Works department had spent considerable time fixing water main breaks and sanitary sewer issues in an older neighborhood located in the southeast quadrant of town. DGR Engineering (DGR) assisted the City with their annual capital improvement planning process, which helped to identify the scope of the nearly 30 city block reconstruction project that would ultimately be referred to as the Southeast Infrastructure Improvements.

DGR worked closely with the City to develop the project design, and also provided construction administration and observation services. The project was constructed in multiple phases over a three-year period, which helped limit the impact to the residents in the area. Construction occurred under two separate contracts with the first phase commencing in 2019 and project completion occurring in 2022. The improvements included complete replacement of the sanitary sewer collection system, drinking water distribution system, storm drainage system, streets, and sidewalks within the limits of the project. The borings completed during the initial design indicated quartzite bedrock was less than 6 feet below the surface throughout much of the project area, with some areas having bedrock less than two feet below the surface. Rock blasting was needed to provide sufficient depth on the new water mains and adequate slope on the new sewer mains. More than 3,000 cubic yards of quartzite rock was excavated for the project. The rock blasting operations required greater communication than normal with the nearby residents and the natural gas company.

The project included other unique elements in addition to the rock blasting. There were over 1,800 feet of existing sanitary sewer and water mains that were installed in narrow alleys, and there was not enough space to replace and maintain both utilities in the alleys. Thus, the new water mains were installed in the street and new water services were directional drilled from the street to the backyards where the connections were made. The project also included replacement of a shallow box culvert that was built masonry style from quartzite rock. A new precast box culvert was installed across the street, which involved rock blasting followed by cast-in-place concrete transition sections on each end to tie into the existing masonry quartzite rock drainage channel.

New ADA-compliant sidewalks and curb ramps were installed throughout the project to improve pedestrian travel. New streets were constructed with asphalt pavement in the residential areas and with concrete pavement along the truck route. All streets were constructed with concrete curb and gutter. Storm drainage in the area was greatly enhanced by improving the slopes of the streets and installing new storm drainage systems. Coordination with the local railroad entity was required for replacement of the existing sanitary sewer, water, and storm sewer utilities at four railroad crossings.

The project was financed by multiple funding sources. The City was awarded a $600,000 grant through the SDDOT’s Community Access Grant program for the improvements along the truck route. Most of the project funding was received through the State Revolving Fund (SRF) programs that are administered by the South Dakota Department of Agriculture & Natural Resources. Both grant and loan funds were received through the SRF programs. The City also contributed local funds for a portion of the project costs.
DGR and the City of Dell Rapids have formed a strong working relationship over the last 30-plus years, which was key to the success of this project. DGR and the City emphasized coordination and communication with the 200-plus residents, property owners, business owners, and others affected by the project, from initial design concepts through final completion. This coordination and communication took place in many forms, including public open houses, various mailed letters, individual meetings, bi-weekly progress meetings and newsletters throughout construction. Replacing existing infrastructure in a developed residential neighborhood is challenging for all involved, but exceptional coordination and communication again proved to limit the difficulties in the process.

The Southeast Infrastructure Improvements project was an investment by the City of Dell Rapids into one of the older neighborhoods in town. The project revitalized the neighborhood by replacing dilapidated infrastructure with new, dependable infrastructure that will serve the community for many years to come.

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Neighborhood Revitalization

The Southeast Infrastructure Improvements project revitalized the neighborhood by replacing dilapidated infrastructure with new, dependable infrastructure.

Neighborhood Revitalization
Dell Rapids, SD

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The infrastructure investment will significantly improve and benefit the community and all residents with many years ahead with reliable infrastructure.

Infrastructure Improvements
Chancellor, SD

Water Treatment Plant

The building is expandable to add future treatment equipment that can double the treatment capacity as water demands increase in the future. With three times more water available and enough annual water appropriation to operate at full capacity all year long, the new facility has become Red Rock’s primary water source.

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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.

Water System Improvements
Sheldon, IA

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.

Drainage Channel Improvements
Sioux Falls, SD

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.

Athletic Field Site Design
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Infrastructure Improvements

April 8, 2024

DGR Engineering (DGR) and the Town of Chancellor worked together to plan an infrastructure improvements project. Ultimately, solutions were divided into three project phases. Phase 1 included Main Street and the west half of the community. The Town of Chancellor received funding which included nearly 89% in grants and principal loan forgiveness.

Phase 1 included the beginning of a new storm sewer system. DGR and the Town worked with landowners to acquire the needed land and easements for a new storm sewer outlet. It allowed the storm sewer to be extended across the southern end of town in each of the phases of construction, connecting each of the street’s drainage to a larger diameter storm pipe to improve drainage.
Chancellor was awarded Clean Water and Drinking Water State Revolving Funds for their planned Phase 2 project, which covered the central part of the community. They followed with funding for their Phase 3 project and were successful in securing approximately 85% grant and principal loan forgiveness for both Phase 2 and Phase 3 projects.

Each of the project phases included the replacement of sanitary sewer main and services with PVC pipe, replacement of all sanitary manholes with new concrete manholes, replacement and up-sizing of PVC pipe water main and water services as well as adding additional water services to areas that previously did not have existing water main. New street surfacing was placed after the underground improvements. While Main Street included concrete surfacing on the north two blocks, the remaining streets will maintain a rural section paved with asphalt surfacing. The rural section is designed with minor ditches graded along the roadways and culvert replacement at the driveways and intersections to allow the stormwater to flow to the storm sewer system, located at the southern portions of the streets, to reduce the stormwater ponding that had occurred.

The infrastructure investment will significantly improve and benefit the community and all residents. They are looking forward to project completion and many years ahead with reliable infrastructure to support their Town.

Drainage Channel Improvements

April 8, 2024

The City of Sioux Falls requested DGR Engineering’s (DGR) services in 2014 for improvements to a small drainage channel which was undersized, and some adjacent properties and structures had previously sustained flood damage during large rain events. After initial concepts were reviewed, the City opted to have DGR design the channel to handle more capacity, which required making the channel deeper and wider.

The project was put on hold for various reasons, but after almost ten years of coordination, design, and construction, this drainage channel project was finally completed in the summer of 2023. The contractor and subcontractors did an amazing job revitalizing an area that had been neglected and overgrown, and the property owners along Riverdale Road are now better protected against future flooding.

Athletic Field Site Design

April 8, 2024

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.

The biggest challenge: fitting a new modern facility within the existing field’s footprint (circa 1991). To achieve this, home plate was shifted approximately 12 feet south to maintain existing fencing dimensions and provide room for chair back seating and a fan suite/press box behind home plate. Also, an extended planning process was necessary to balance donation momentum with the university’s facility expectations for a championship-level facility.

The final project plan balanced design goals with the funding while utilizing bid alternates for several features to allow the University flexibility in decision-making in the following areas:

• Lighting
• Outfield padding
• Dugout Cabinets
• Press box lift
• Home team dugout kitchenette
• Chairback seating – Potential future addition space

The final result is a state-of-the-art facility that all parties can be proud of and that will serve the needs of Augustana University’s softball team and its fans for many years.

New Water Treatment Plant

October 24, 2022

New Water Treatment Plant

DCIM100MEDIADJI_0650.JPG

Vision Becomes Reality

Iowa Lakes Regional Water's Osgood Water Treatment Plant

Project Owner:
Iowa Lakes Regional Water

Key Experience:

  • RD Water and Waste Disposal Loan and Grant Program Funding
  • Piloted technology to prove concept

Key Features:

  • Direct treatment reverse osmosis water treatment plant
  • 750,000 gpd capacity, expandable to 2.25 MGD
  • Utilizes shallow alluvial wells located approximately 2.5 miles away from the plant
  • Membraned system provides a modular style construction that allows for easy expansion

Iowa Lakes Regional Water (ILRW) provides water service to small communities and nearly 5,000 rural residents in northwest Iowa. The ILRW system encompasses over 200 square miles of service area in all or parts of Dickinson, Emmet, Clay, Palo Alto, Buena Vista, Sac and Cherokee Counties in Iowa and Jackson County in Minnesota. Water demands within the ILRW system are diverse, from high residential and tourism demands in the Lake Okoboji and Big Spirit Lake areas in the northern part of the system, to rural residential and large agricultural demands in the remainder of the system.

The Lakes area of the ILRW system has experienced significant growth as it has become a popular tourism location for residents of the upper Midwest. As ILRW developed the Lakes Area, they initially purchased water from a municipal system that treated surface water from Lake Okoboji. This source was an economical option to get the new distribution system started, but recent changes in surface water treatment has led to rising treatment costs and challenges with increasing disinfection byproduct concentrations. ILRW had the goal to provide this area and other rural customers with a higher quality and more economical water source than what they received from their bulk sources. A new treatment plant, the "Osgood" water treatment plant, fulfilled that goal.

The development of the Osgood water source has been a goal of ILRW for decades. As ILRW developed the eastern side of its system, ILRW and DGR Engineering (DGR) worked together to design and install transmission capacity capable of incorporating the Osgood water source, knowing that the new WTP would be needed in the future. The three goals of the project were as follows: to gain independence from purchased water sources, to provide high quality water to existing customers, and to accommodate system growth.

The plant is located along the Des Moines River between Graettinger and Emmetsburg, Iowa. The well field is in a shallow alluvial aquifer approximately 40 feet deep located 2.5 miles east of the water treatment plant and on the eastern side of the Des Moines River. The water treatment plant is located on the western side of the river at a much higher elevation and out of the flood plain of the river. Osgood has a capacity of 750,000 gallons per day and is easily expandable to 2.25 MGD.

The project was developed using the United States Department of Agriculture Rural Development’s (RD) Water and Waste Disposal Loan and Grant Program, which has been the primary funding source for many ILRW projects. ILRW was able to obtain a loan and grant package from RD that enabled the project to be affordable to existing ILRW customers without having to raise rates.

All of ILRW's existing sources provided softened water, so it was prudent that any process considered incorporate softening. Hardness removal can be achieved through precipitation within conventional processes (lime softening), ion exchange, or non-conventional processes such as electrodialysis and membranes.

During the preliminary engineering report phase, ILRW and DGR evaluated three alternatives to achieve the treated water quality goals:
• Lime softening
• Nanofiltration/reverse osmosis (RO) with pretreatment
• Nanofiltration/reverse osmosis direct treatment

Many alternatives were considered but a direct treatment reverse osmosis water treatment plant was selected due to the lowest initial capital investment and ease of operation. The membraned system also provides a modular style construction that allows for easy expansion as system demands increase.

Reverse osmosis treatment without pretreatment for iron and manganese removal may not always be successful, so the technology was piloted to prove the concept would work. The pilot demonstrated that the water source was a great fit for direct treatment by reverse osmosis. In addition to iron, manganese, and hardness removal, softening membranes have an added benefit of removing other contaminants, such as nitrate, which is always a concern with shallow alluvial aquifers in agricultural settings. Nitrate levels are currently below the EPA's MCL, but test drilling showed elevated levels near the well field.

Not all membrane equipment suppliers are advocates of direct treatment, and so to ensure a successful project, ILRW decided to procure the membrane equipment prior to final design. The equipment procurement process allowed ILRW to make a selection of the equipment manufacturer based on qualifications, construction cost and operating costs, and allowed the equipment manufacturer to join the design team for final design.

The project was bid at the beginning of the pandemic (April 23, 2020) with very competitive bids. Six bids were received on the project with all bids being within 5.5-percent of the low bidder. The project was awarded to John T. Jones Construction Company on June 26, 2020, and substantial completion on the project was granted on January 25, 2022.

While direct treatment with softening membranes is not uncommon in and of itself, this project was unique in that it utilized shallow alluvial wells located approximately 2.5 miles away from the treatment plant. Due to the long raw water pipeline, ILRW and DGR determined that best practices would be to include a means to pig (clean the inner walls of pipes) the raw water pipeline in the final layout.

Based on the pilot water quality results and operating pressures, a hybrid skid was designed which utilized two different styles of membranes in each stage to target different contaminants. The RO skid was also designed for two half-sized trains on one frame to minimize the footprint and reduce overall capital costs. The half-sized trains allowed the plant to operate for a longer duration during low demand and minimize the amount of water wasted during the raw water pipeline flush period between startups/shutdowns. Thirdly, two treatment trains on one skid allowed for redundancy of the treatment equipment.

Treated water quality from the new Osgood WTP is summarized in the following table:

As indicated in the table above, the Osgood WTP produces high quality water for the customers of ILRW, a quality unmatched by most water systems. The water quality produced by Osgood is equivalent to the water quality produced by ILRW’s other water treatment plant, providing customers with consistent water quality regardless of water source. The consistent water quality has significantly reduced taste and odor complaints because the use of other bulk water sources has been significantly reduced. Osgood has reduced ILRW’s dependency on outside water sources, reduced operational costs, and set ILRW up to provide water for future demand growth.

20220609_081758
20220609_080736edit copy

Featured Projects

All
  • All
  • Aviation
  • Civil
  • Electrical Power
  • Survey
  • Wastewater
  • Water

Neighborhood Revitalization

The Southeast Infrastructure Improvements project revitalized the neighborhood by replacing dilapidated infrastructure with new, dependable infrastructure.

Neighborhood Revitalization
Dell Rapids, SD

Infrastructure Improvements

The infrastructure investment will significantly improve and benefit the community and all residents with many years ahead with reliable infrastructure.

Infrastructure Improvements
Chancellor, SD

Water Treatment Plant

The building is expandable to add future treatment equipment that can double the treatment capacity as water demands increase in the future. With three times more water available and enough annual water appropriation to operate at full capacity all year long, the new facility has become Red Rock’s primary water source.

Water Treatment Plant
Jeffers, MN

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.

Water System Improvements
Sheldon, IA

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.

Drainage Channel Improvements
Sioux Falls, SD

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.

Athletic Field Site Design
Sioux Falls, SD