Tunnel Counts by State
| State Name | Tunnel Count |
|---|---|
| ALABAMA | 4 |
| ALASKA | 3 |
| ARIZONA | 4 |
| ARKANSAS | 1 |
| CALIFORNIA | 90 |
| COLORADO | 41 |
| CONNECTICUT | 3 |
| DELAWARE | 0 |
| DISTRICT OF COLUMBIA | 17 |
| FLORIDA | 2 |
| GEORGIA | 1 |
| HAWAII | 11 |
| IDAHO | 10 |
| ILLINOIS | 4 |
| INDIANA | 5 |
| IOWA | 1 |
| KANSAS | 0 |
| KENTUCKY | 9 |
| LOUISIANA | 3 |
| MAINE | 0 |
| MARYLAND | 5 |
| MASSACHUSETTS | 44 |
| MICHIGAN | 9 |
| MINNESOTA | 5 |
| MISSISSIPPI | 0 |
| MISSOURI | 1 |
| MONTANA | 4 |
| NEBRASKA | 3 |
| NEVADA | 6 |
| NEW HAMPSHIRE | 0 |
| NEW JERSEY | 5 |
| NEW MEXICO | 3 |
| NEW YORK | 10 |
| NORTH CAROLINA | 29 |
| NORTH DAKOTA | 0 |
| OHIO | 1 |
| OKLAHOMA | 0 |
| OREGON | 14 |
| PENNSYLVANIA | 26 |
| PUERTO RICO | 3 |
| RHODE ISLAND | 1 |
| SOUTH CAROLINA | 0 |
| SOUTH DAKOTA | 7 |
| TENNESSEE | 13 |
| TEXAS | 5 |
| UTAH | 6 |
| VERMONT | 0 |
| VIRGINIA | 17 |
| WASHINGTON | 57 |
| WEST VIRGINIA | 10 |
| WISCONSIN | 0 |
| WYOMING | 10 |
| TOTAL | 503 |