Bantrel, Inc
Bennet Technologies

Black & Veatch
Brown & Caldwell

Burlington Northern Rail Road

Caltrans
CH2M-Hill

Dawn Underground Engineering

Gannett - Fleming

Haley & Aldrich

Harris & Associates

Hatch, Mott, MacDonald

Jacobs-Sverdrup International

Jason Consultants

Lyman Henn, Inc.

Montgomery Watson/Harza

Norfolk & Southern Rail Road

Parson Brinckerhoff

Rocky Mountain Consultants

State of North Carolina, Dept. of Highways
State of Virginia, Department of Transportation

Union Pacific Rail Road
URS