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 |
|---|---|---|---|---|---|
| Badwater Creek | Wyoming | Poor | 1940 | 86 | 22 |
| Elk Creek | Wyoming | Poor | 1940 | 86 | 343 |
| New Fork River | Wyoming | Poor | 1940 | 86 | 40 |
| Uinta Ditch No. 3 | Wyoming | Poor | 1940 | 86 | 73 |
| Greasewood Creek | Wyoming | Fair | 1940 | 86 | 259 |
| Mill Creek | Wyoming | Poor | 1940 | 86 | 2 |
| Bear River | Wyoming | Poor | 1941 | 85 | 2,961 |
| Burlington Supply Ditch | Wyoming | Fair | 1941 | 85 | 14,340 |
| First Sand Creek | Wyoming | Fair | 1942 | 84 | 458 |
| Unnamed Draw | Wyoming | Fair | 1942 | 84 | 2,401 |
| North Fork Powder River | Wyoming | Fair | 1942 | 84 | 229 |
| Grease Wood Draw | Wyoming | Poor | 1942 | 84 | 2,401 |
| Unnamed Draw | Wyoming | Fair | 1942 | 84 | 1,126 |
| Unnamed Draw | Wyoming | Good | 1942 | 84 | 648 |
| CRAZY WOMAN CREEK | Wyoming | Fair | 1945 | 81 | 62 |
| Little Big Horn River | Wyoming | Fair | 1945 | 81 | 116 |
| Horse Creek | Wyoming | Fair | 1946 | 80 | 44 |
| Little Bear Creek | Wyoming | Fair | 1946 | 80 | 47 |
| Unnamed Draw | Wyoming | Fair | 1946 | 80 | 3,127 |
| Blacks Fork River | Wyoming | Fair | 1946 | 80 | 1,126 |
| UPRR | Wyoming | Fair | 1946 | 80 | 3,065 |
| Hoback River | Wyoming | Fair | 1946 | 80 | 2,509 |
| Floodwater Creek | Wyoming | Poor | 1946 | 80 | 1,530 |
| Little Goose Creek | Wyoming | Fair | 1946 | 80 | 1,679 |
| BNSF Railway | Wyoming | Fair | 1946 | 80 | 105 |
| Unnamed Draw | Wyoming | Fair | 1946 | 80 | 7,222 |
| Unnamed Draw | Wyoming | Fair | 1946 | 80 | 7,563 |
| Unnamed Draw | Wyoming | Fair | 1946 | 80 | 7,222 |
| Unnamed Draw | Wyoming | Fair | 1946 | 80 | 741 |
| Sage Creek | Wyoming | Fair | 1947 | 79 | 2,086 |
| Unnamed Draw | Wyoming | Fair | 1947 | 79 | 648 |
| Little Piney Creek | Wyoming | Good | 1947 | 79 | 611 |
| Boysen Dam Spillway | Wyoming | Fair | 1948 | 78 | 5 |
| SHELL CREEK | Wyoming | Good | 1948 | 78 | 45 |
| Rock Creek | Wyoming | Poor | 1948 | 78 | 153 |
| Unnamed Draw | Wyoming | Good | 1948 | 78 | 85 |
| S Fork Sundance Creek | Wyoming | Fair | 1948 | 78 | 556 |
| UPRR | Wyoming | Fair | 1948 | 78 | 1,302 |
| Sand Draw | Wyoming | Fair | 1948 | 78 | 1,662 |
| Dry Draw | Wyoming | Good | 1948 | 78 | 1,387 |
| Alkali Creek | Wyoming | Fair | 1948 | 78 | 216 |
| Medicine Lodge Creek | Wyoming | Fair | 1948 | 78 | 216 |
| Cottonwood Creek | Wyoming | Fair | 1948 | 78 | 621 |
| Sundance Creek | Wyoming | Fair | 1948 | 78 | 556 |
| N Fork Sundance Creek | Wyoming | Fair | 1948 | 78 | 556 |
| Dry Draw | Wyoming | Good | 1948 | 78 | 774 |
| Austin Creek | Wyoming | Fair | 1948 | 78 | 123 |
| WIND RIVER | Wyoming | Good | 1949 | 77 | 50 |
| WARM SPRINGS CREEK | Wyoming | Good | 1949 | 77 | 50 |
| Smiths Fork River | Wyoming | Fair | 1949 | 77 | 782 |
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.