Gas Main Replacement

Renewal Area #3, Botetourt County, Virginia

The Roanoke Gas Company selected Weston & Sampson to design and permit the replacement of about two miles of existing 2-inch, Aldyl A, plastic gas main that had been installed prior to 1973 and had become a potential risk to operations. The project in Botetourt County in western Virginia will replace the existing main with new 2-inch, high density polyethylene (HDPE) plastic gas main in four neighborhoods.

We began by surveying the project areas to capture the existing conditions within the Virginia Department of Transportation (VDOT) road right-of-way and preparing construction design plans for the installation of the new gas main. We coordinated permitting efforts for the project and performed construction staking of the alignment of the proposed new gas main. Weston & Sampson used the field survey data to supplement existing data provided by Roanoke Gas. This provided additional information as to the horizontal location of roadway structures, land features, property corners, roadway rights-of-way, edge of pavement, and existing utilities to facilitate the development of the linear alignment design plans for the project. Our subsequent construction plan set included the linear alignment design of the new gas main within the VDOT right-of-way in plan view as well as in profile view where the new gas main crossed existing utilities, along with erosion and sediment control and VDOT traffic management details. We also coordinated with VDOT for the approval of the Land Use Permit Application for the project.

The new HDPE gas main will have a much longer life than the original plastic main and will add to the safe operations of gas delivery in the four neighborhoods. Weston & Sampson’s work will also reduce ongoing operating costs for Roanoke Gas, allowing them to focus on other areas of system improvement.


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