| Reverse Curve Tunnel |
Glenwood Spgs, CO |
Colorado DOT |
Umbrella |
60 mil non-reinforced PVC |
50.000 |
| LaSalle Tunnels |
Hyattsville, MD |
WMATA |
Closed |
80 mil reinforced PVC |
600.000 |
| Greenbelt Tunnels |
College Pk, MD |
WMATA |
Closed |
80 mil non-reinforced PVC |
700.000 |
| Lehigh Tunnel #2 |
Slatington, PA |
Pennsylvania Turnpike Comm. |
Umbrella |
60 mil non-reinforced PVC |
390.000 |
| Hanging Lakes |
Colorado |
Colorado DOT |
Umbrella |
60 mil non-reinforced PVC |
180.000 |
| Lafayette Tunnel |
Duluth, MN |
Minn. DOT |
Umbrella |
60 mil non-reinforced PVC |
85.000 |
| Silver Cliff Tunnel |
Duluth, MN |
Minn. DOT |
Umbrella |
60 mil non-reinforced PVC |
145.000 |
| Cumberland Gap Tunnel |
Middlesboro, KY |
US Dept. of Interior |
Umbrella |
60 mil non-reinforced PVC |
700.000 |
| H3 Halawa Tunnels |
Oahu, HI |
Hawaii DOT |
Umbrella |
60 mil non-reinforced PVC |
540.000 |
| Shot Tower Tunnels |
Baltimore, MD |
Maryland Trans. |
Closed |
80 mil non-reinforced PVC and HDPE |
100.000 |
| Hoover Dam Shaft |
Boulder City, NV |
US Bureau of Reclamation |
Closed |
60 mil non-reinforced PVC |
27.000 |
| Calumet Tunnels |
S. Holland, IL |
W. Rec. Dist of Chicago |
Closed |
80 mil non-reinforced PVC |
110.000 |
| DART Tunnels |
Dallas, TX |
Dallas Area Rapid Transit |
Umbrella |
60 mil non-reinforced PVC |
1.000.000 |
| B-251 Shaft |
Los Angeles, CA |
LA METRO |
Closed |
60 mil XR5 |
15.000 |
| Kenen Dume Tunnel |
Malibu, CA |
|
Umbrella |
60 mil non-reinforced PVC |
20.000 |
| Lehigh Tunnel Rehab. No. 1 |
Slatington, PA |
Pennsylvania Turnpike Comm. |
Umbrella |
60 mil-reinforced PVC |
150.000 |
| WMATA B11a |
Wheaton, MD |
WMATA |
Umbrella |
60 mil non-reinforced PVC |
500.000 |
| Glenmont Station |
Wheaton, MD |
WMATA |
Umbrella |
100 mil non-reinforced PVC |
200.000 |
| Petworth Station |
Washington, D.C. |
WMATA |
Closed |
100 mil non-reinforced PVC |
300.000 |
| Columbia Heights |
Washington, D.C. |
WMATA |
Closed |
100 mil non-reinforced PVC |
300.000 |
| 14th Street Tunnels |
Washington, D.C. |
WMATA |
Closed |
80 mil non-reinforced PVC |
235.000 |
| 14th Street Tunnels |
Washington, D.C. |
WMATA |
Closed |
100 mil non-reinforced |
100.000 |
| 14th Street Tunnels |
Washington, D.C. |
WMATA |
Closed |
120 mil reinforced PVC |
110.000 |
| Park Road Tunnels |
Washington, D.C. |
WMATA |
Closed |
80 mil reinforced |
270.000 |
| Park Road Tunnels |
Washington, D.C. |
WMATA |
Closed |
100 mil non-reinforced |
90.000 |
| Park Road Tunnels |
Washington, D.C. |
WMATA |
Closed |
120 mil reinforced |
130.000 |
| H3 Trans-Koolau Finish Contract |
Oahu, Hawaii |
Hawaii DOT |
Umbrella |
60 mil non-reinforced |
240.000 |
| Bunyard Tunnels |
Fort Smith, AR |
Arkansas DOT |
Umbrella |
60 mil non-reinforced |
240.000 |
| Berry St. Tunnels |
Pittsburgh, PA |
Penn DOT |
Umbrella |
60 mil non-reinforced |
150.000 |
| Congress Heights EPBM Tunnels |
Washington, D.C. |
WMATA |
Closed |
80 mil non-reinforced |
230.000 |
| Congress Heights EPBM Tunnels |
Washington, D.C. |
WMATA |
Closed |
120 mil reinforced |
90.000 |
| Cong. Hts. Sta. & NATM Tunnels |
Washington, D.C. |
WMATA |
Closed |
80 mil non-reinforced |
180.000 |
| Cong. Hts. Sta. & NATM Tunnels |
Washington, D.C. |
WMATA |
Closed |
100 mil non-reinforced |
285.000 |
| Mendenhall Glacier |
Juneau, AK |
USDA |
Umbrella |
80 mil Non-reinforced |
7.000 |
| S. Boston Piers Transitway Contract SOCN09 |
Boston, MA |
MBTA |
Closed |
100 mil non-reinforced |
65.000 |
| S. Boston Piers Transitway Contract E02CN14 |
Boston, MA |
MBTA |
Closed/Partial |
100mil non-reinforced |
300.000 |
| S. Boston Piers Transitway Contract E02CN14 |
Boston, MA |
MBTA |
Closed/Partial |
80 mil Reinf.-Polypropylene |
45.000 |
| Rio Piedras Contract |
Rio Piedras, PR |
ACT Tren Urbano |
Closed |
80 mil non-reinforced |
150.500 |
| Rio Piedras Contract |
Rio Piedras, PR |
ACT Tren Urbano |
Closed |
100 mil non-reinforced |
446.500 |
| St. George Tunnel Rehabilitation |
New York, NY |
Staten Island Rapid Transit |
Closed |
100 mil non-reinforced |
22.000 |
| Dulles Airport Walkback Tunnel |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
80 mil non-reinforced |
90.000 |
| Dulles Airport Walkback Tunnel |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
30.000 |
| Weehawken Tunnel Project |
North Bergen, NJ |
NJ Transit, Hudson Bergen Lt. Rail Project |
Umbrella |
80 mil non-reinforced |
260.000 |
| Weehawken Tunnel Project |
North Bergen, NJ |
NJ Transit, Hudson Bergen Lt. Rail Project |
Umbrella |
100 mil non-reinforced |
60.000 |
| Dulles Airport West Utility Building Tunnel |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
95.000 |
| Dulles Airport APM West Tunnel |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
395.000 |
| Dulles Airport APM East Tunnel |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
750.000 |
| Dulles Airport Pedestrian Walkback Package |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
85.000 |
| Dulles Airport Taxi Way F |
Herndon, VA |
Metropolitan Washington Airports Authority |
Closed |
100 mil non-reinforced |
195.000 |
| South Boston Piers-Russia Warf |
Boston, MA |
MBTA |
Closed |
100 mil non-reinforced |
125.000 |
| Pattiki Mine Shaft |
IL |
White County Coal Mine |
Closed |
100 mil non-reinforced |
45.000 |
