Regional Airport Water Transmission Main Loop

Regional Airport Water Transmission Main Loop


Rapid City, SD

Construction Cost

$ 5,067,427

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The project consists of approximately 5.7 miles of 16”-diameter pipe extending a second water main out to the airport. This project creates a looped system, increases fire protection at the airport, and will provide water service to the developing area between current City limits and the airport. The project was divided into five separate bid packages. The 5th phase includes rehabilitating a cathodic protection system for a 30”-diameter steel water main from the City’s water treatment plant to downtown Rapid City. 

The overall project includes 29,968' of restrained 16”-diameter water main, 1,270' of restrained 12”-diameter water main, and appurtenances including fittings, valves, hydrants and air release/vacuum valves. Portions of the new water main are currently in a pasture, so design had to incorporate considerations for the future arterial roadways and anticipated intersections. Design included preliminary road alignment and grade so that the water main could be appropriately located vertically as well as horizontally. Until future roadways are constructed in pasture areas, access for maintenance is being provided by gravel access roads with appropriately designed drainage features.

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Project Goal #1

Improve water supply to the Rapid City Regional Airport for fireflows and development on Airport property

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Project Goal #2

Provide a City water supply to facilitate development between the City's current eastern City limits and the Airport

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Project Goal #3

Replace/rehabilitate the cathodic protection system for the City's 30"-diameter steel water main from the Mountain View water treatment plant to downtown

Project Features

  • 16" diameter water transmission main
  • Two new semi-deep well cathodic protection systems for 30" diameter steel water transmission main

Services Provided

  • Preliminary/Final Design
  • Construction Documents
  • Bidding Services
  • Construction Contract Administration
  • Construction Observation

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