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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
Smiths Fork River Wyoming Poor 1908 118 26
SNAKE RIVER Wyoming Fair 1911 115 1,800
Ft Laramie Canal Wyoming Fair 1913 113 2
North Piney Creek Wyoming Fair 1914 112 32
Ft Laramie Canal Wyoming Fair 1915 111 2
FIREHOLE RIVER Wyoming Fair 1915 111 250
North Platte River Wyoming Poor 1915 111 69
Encampment River Wyoming Poor 1915 111 71
Medicine Bow River Wyoming Poor 1915 111 59
BNSF Railway Wyoming Poor 1916 110 136
Little Sandy Creek Wyoming Fair 1920 106 25
Little Horse Creek Wyoming Fair 1920 106 29
Cheyenne River Wyoming Poor 1920 106 3
Wild Horse Creek Wyoming Fair 1920 106 8
Piney Creek Wyoming Fair 1920 106 241
Big Wind River Wyoming Poor 1920 106 40
Big Wind River Wyoming Poor 1921 105 81
Haymaker Draw Wyoming Poor 1921 105 140
Middle Fork Bear Creek Wyoming Fair 1922 104 182
North Fork Bear Creek Wyoming Fair 1922 104 182
Shoshone River Wyoming Poor 1924 102 100
Cloud Creek Wyoming Fair 1924 102 1,070
Interstate Canal Wyoming Fair 1924 102 155
FIREHOLE RIVER Wyoming Poor 1925 101 10
Wood River Wyoming Fair 1925 101 178
Wind River Wyoming Poor 1925 101 26
Fort Laramie Canal Wyoming Poor 1925 101 52
Little Tongue River Wyoming Fair 1926 100 738
Laprele Creek Wyoming Fair 1926 100 20
Antelope Creek Wyoming Fair 1926 100 343
Shoshone River Wyoming Poor 1926 100 119
Guernsey Dam Spillway Wyoming Fair 1927 99 100
Spring Creek Wyoming Fair 1927 99 58
Tensleep Creek Wyoming Poor 1929 97 164
BNSF Railway Wyoming Poor 1929 97 136
North Platte River Wyoming Poor 1929 97 50
Hogback Draw Wyoming Poor 1929 97 165
Mowrey Draw Wyoming Fair 1929 97 165
Spillway Hanover Canal Wyoming Poor 1929 97 119
North Platte River Wyoming Poor 1930 96 782
North Platte River Wyoming Poor 1930 96 97
Little Goose Creek Wyoming Fair 1930 96 116
Red Wall Draw Wyoming Fair 1930 96 13
Big Horn River Wyoming Poor 1930 96 88
Canal No 2 Wyoming Poor 1930 96 138
Rattlesnake Creek Wyoming Fair 1930 96 65
Canal No 1 Wyoming Fair 1931 95 138
Blacks Fork River Wyoming Poor 1931 95 42
Blacks Fork River Wyoming Fair 1931 95 42
LAVA CREEK Wyoming Fair 1932 94 1,807

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.

All Bridges Poor Condition Scour Critical Bridge Stats