Street Lighting Improvements
Hawarden's Street Lighting
Gets a Makeover
Project improves energy efficiency and aesthetics
City of Hawarden, IA
- New LED lighting pattern meets and exceeds the brightness of the existing lights
Appearance of the lighting on the roadway is much more uniform than the legacy lighting
- Overall number of street lights was reduced
- Improved roadway visibility
- Reduced operating costs
- Enhanced appearance along Highway 10
The legacy street lights along Highway 10 in Hawarden, Iowa had reached the end of their useful life. Many of the mast structures were beginning to corrode and a few, which were too old for replacement parts, had been removed completely, resulting in poorly lit areas along the street.
The City wanted to replace the old lighting system with a modern LED based system to reduce operating cost. In addition, they preferred to use decorative style lighting units which would enhance the aesthetics of the downtown area, and match what had been utilized in other parts of the city.
For the residential area of the street, cobra head fixtures were desired. This type of fixture is used to reduce cost while also providing improved lighting levels.
To begin the process, existing emitted light patterns were modeled using VisualTM 2012, an Acuity Brands Lighting software package, to determine the photometric patterns of the existing lighting system. The City wished to maintain or exceed current lighting levels. Once existing levels were determined, the new street lighting system was designed based on the Illuminating Engineering Society’s (IES) RP-8 guidelines and to meet or exceed existing lighting intensity levels. After the layout was completed, construction plans were developed. Preparations were made to hire a contractor to install the system along with the related foundations, conduit, wiring, and grounding.
The City is pleased with the new lighting system performance improved intensity and uniformity, as well as the reduced energy consumption of the system.
- 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