Haymarket, Virginia, United States
230kV Underground Transmission Line

Electrical conduits installed beneath Interstate Highway 66 enhance the eastern seaboard power grid.

Empowering Eastern Virginia

Four HDD installations under an interstate highway provided conduits for a 17-pipe bundle. 

The Gainesville to Haymarket project was executed to enhance electrical capacity for the eastern Virginia and urban D.C. area. The project involved four horizontal directional drilling (HDD) installations under Interstate Highway 66, east of Washington, D.C. A 48-inch-diameter HDPE casing was installed for each crossing, and a bundle of 17 HDPE conduits was pulled in for electrical and fiber optic cables. To counteract the heat generated by electrical cables, the annular space between the conduits and the casing was filled with specialized thermal grout.

  • Four HDD installations at two different sites.
  • 48-inch-diamter HDPE casing.
  • 17 conduit HDPE bundle pulled in after casing installation.
  • Thermal grouting to mitigate heat-induced ampacity reduction.
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Horizontal Directional Drilling

With 35 years of trenchless construction experience, we’re widely recognized as one of the most capable HDD providers for large-diameter and complex crossing projects.

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Direct Pipe

When site or permitting conditions make other methods impossible, we’re confident in implementing this unique, environmentally friendly, and capable technology with little risk of fracout.

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We integrate our in-house engineering expertise and construction experience to perform our projects safely.

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Engineering, Procurement, & Construction

We offer a comprehensive approach to EPC project delivery under a single contract to reduce interface risk for our clients. This translates into substantial time and cost savings for clients.

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