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Water & Sewer

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A Mainline Contracting sewer work site with heavy machinery in a ditch
Water & Sewer

Trenchless Sanitary Sewer – Jackson Blvd

A Mainline Contracting work site with heavy machinery, pipes and workers in a hole
Water & Sewer

Elk Vale Lift Station Gravity Main & Force Main Upgrade

Mainline Contracting Drainage Project in South Dakota
Water & Sewer

North Middle School Drainage Improvements

Mainline Contracting Dam Dewatering Project in South Dakota
Water & Sewer

Howes & Buffalo Dam Dewatering

Mainline Contracting Water & Sewer Projects in South Dakota
Water & Sewer

Water Meter Facility Relocation

Mainline Contracting Street Reconstruction Project in South Dakota
Water & Sewer

9th Street Reconstruction, Columbus To Fulton

Mainline's crew that was assigned to our project were professional throughout the project and assured that the City's expectations were met and exceeded. In spite of numerous project challenges which included confined site conditions, groundwater/creek seepage, deep bore pits, large cobble to bore through and period of extreme cold weather, Mainline Contracting completed the project with quality workmanship, on time and on budget. 
Kyle Mathis, PE
Mainline Contracting Inc did an excellent job working with the residents affected by the project and providing the resources required to overcome the harsh weather conditions. They kept a positive attitude and were able to meet the substantial completion date set for the project without sacrificing the quality or workmanship of the construction. 
Pennington County
Last summer we had the experience of reconstruction on our street. Fortunately for the city, Mainline Construction and Complete Concrete made it as painless as possible. I hope the city continues to use these two fine companies often. 
Milton & Rhonda Wright
Mainline Contracting made an outstanding effort to exceed compliance expectations for the installation of the drainage improvements, crossings and box culverts for the Back 9 holes at the Elkhorn Ridge Golf Course. The site compliance record at this time is outstanding and is clearly a result of good team effort. 
Wyss Associates

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MAINLINE CONTRACTING
A leader in heavy utility construction

605.348.7068

4900 South Highway 79
Rapid City, SD 57709
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