Wind Tunnel

Allegheny County Sanitary Authority

Work includes launch and retrieval shafts, and access shafts for construction; ort - main tunnel, 18' finished dia (segmental lining), approx. 20,000 LF long, 120 to 150 feet below ground surface; creek tunnel - river crossing, 14' finished dia approx 4,500 long; run tunnel - river crossing, 14' finished diameter, approx 1,600 LF long.

Colorado Springs Utilities

Homestake tunnel inspection.

Iowa Department of Administrative Services

Work includes replacement of the parking lot & tunnel cap, implementation of a sump pump system, replacement of utility lines, repairing the structural integrity of the tunnel walls and relocation of tunnel access hatches. See attached file.