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.

Clear
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.