Historic Bridges in Wyoming
191 bridges built before 1951 in Wyoming still in service today.
Bridges Built Before 1951
The United States has 191 bridges in Wyoming built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.
| Bridge | State | Condition | Year Built | Age (Years) | ADT |
|---|---|---|---|---|---|
| South Fork Powder River | Wyoming | Fair | 1932 | 94 | 79 |
| Dry Creek | Wyoming | Fair | 1932 | 94 | 26 |
| Twin Creek | Wyoming | Poor | 1932 | 94 | 8 |
| Beaver Creek | Wyoming | Poor | 1933 | 93 | 136 |
| Unnamed Draw | Wyoming | Poor | 1933 | 93 | 136 |
| OTTER CREEK | Wyoming | Poor | 1934 | 92 | 1,807 |
| CRAWFISH CREEK | Wyoming | Fair | 1934 | 92 | 3,952 |
| SODA BUTTE CREEK | Wyoming | Fair | 1934 | 92 | 1,982 |
| SODA BUTTE CREEK | Wyoming | Fair | 1934 | 92 | 1,982 |
| PEBBLE CREEK | Wyoming | Fair | 1934 | 92 | 1,982 |
| North Brush Creek | Wyoming | Fair | 1934 | 92 | 733 |
| UPRR | Wyoming | Poor | 1934 | 92 | 640 |
| Big Horn River | Wyoming | Poor | 1934 | 92 | 1,045 |
| ARIZONA CREEK | Wyoming | Fair | 1935 | 91 | 5,000 |
| NEZ PERCE CREEK | Wyoming | Fair | 1935 | 91 | 1,807 |
| TOWER CREEK | Wyoming | Fair | 1935 | 91 | 1,807 |
| THERMAL AREA DRAINAGE | Wyoming | Fair | 1935 | 91 | 1,500 |
| THERMAL AREA DRAINAGE | Wyoming | Poor | 1935 | 91 | 1,500 |
| THERMAL AREA DRAINAGE | Wyoming | Poor | 1935 | 91 | 1,500 |
| BNSF Railway | Wyoming | Poor | 1935 | 91 | 87 |
| Smiths Fork River | Wyoming | Fair | 1935 | 91 | 2,518 |
| Spring Creek | Wyoming | Fair | 1935 | 91 | 2,518 |
| North Fork Powder River | Wyoming | Fair | 1935 | 91 | 310 |
| Baxter Draw | Wyoming | Good | 1935 | 91 | 208 |
| Lodgepole Creek | Wyoming | Poor | 1935 | 91 | 481 |
| Wolf Creek | Wyoming | Fair | 1935 | 91 | 23 |
| Big Wind River | Wyoming | Fair | 1935 | 91 | 274 |
| Unnamed Draw | Wyoming | Fair | 1935 | 91 | 7,540 |
| Nowood River | Wyoming | Fair | 1935 | 91 | 16 |
| East Fork Sand Creek | Wyoming | Poor | 1935 | 91 | 4 |
| Spring Creek | Wyoming | Fair | 1935 | 91 | 26 |
| GIBBON RIVER | Wyoming | Fair | 1936 | 90 | 1,807 |
| YELLOWSTONE RIVER | Wyoming | Fair | 1936 | 90 | 1,286 |
| DRY CREEK | Wyoming | Fair | 1936 | 90 | 1,982 |
| DRY CREEK | Wyoming | Fair | 1936 | 90 | 1,982 |
| DRY CREEK | Wyoming | Fair | 1936 | 90 | 1,982 |
| Dry Wash | Wyoming | Good | 1936 | 90 | 417 |
| LITTLE POPO AGIE | Wyoming | Good | 1937 | 89 | 50 |
| Owl Creek | Wyoming | Fair | 1937 | 89 | 1,934 |
| Bitter Creek | Wyoming | Poor | 1937 | 89 | 1,493 |
| Horse Creek | Wyoming | Fair | 1937 | 89 | 450 |
| Big Cottonwood Creek | Wyoming | Poor | 1937 | 89 | 16 |
| Bull Lake Dam Spillway | Wyoming | Poor | 1938 | 88 | 5 |
| Flat Creek | Wyoming | Poor | 1938 | 88 | 15,780 |
| GARDNER RIVER | Wyoming | Fair | 1939 | 87 | 4,350 |
| Little Goose Creek | Wyoming | Fair | 1939 | 87 | 1,679 |
| BEAVER CREEK | Wyoming | Good | 1940 | 86 | 100 |
| N.FORK SHOSHONE | Wyoming | Good | 1940 | 86 | 25 |
| Muddy Creek | Wyoming | Good | 1940 | 86 | 1,817 |
| Dead Horse Canyon Creek | Wyoming | Fair | 1940 | 86 | 5,361 |
About Historic Bridge Data
Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.