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Historic Bridges in Colorado

857 bridges built before 1951 in Colorado still in service today.

Bridges Built Before 1951

The United States has 857 bridges in Colorado 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
Harmony No2 Return Canal Colorado Poor 1930 96 —
Transfer Ditch Colorado Fair 1930 96 6,800
North Poudre Canal Colorado Fair 1930 96 1,103
Larimer County Canal Colorado Poor 1930 96 91
WILLOW CREEK Colorado Fair 1930 96 1,800
DRAW Colorado Fair 1930 96 14,000
RIO GRANDE RIVER Colorado Fair 1930 96 47
Miller Creek Colorado Fair 1930 96 18
Skull Creek Colorado Poor 1930 96 23
GRANADA CREEK Colorado Poor 1930 96 29
White River Colorado Fair 1930 96 164
North Fork White River Colorado Fair 1930 96 114
HAY CREEK Colorado Fair 1930 96 2,901
Larimer and Weld Canal Colorado Poor 1930 96 304
Rifle Creek Colorado Fair 1931 95 3,547
LARIMER-WELD CANAL Colorado Fair 1931 95 4,250
BIG DRY CREEK Colorado Fair 1931 95 40,486
SODA CREEK Colorado Fair 1931 95 4,159
DRAW Colorado Poor 1931 95 3,400
RATTLESNAKE CREEK SR Colorado Poor 1931 95 383
DRAW Colorado Fair 1931 95 300
SPRING CREEK Colorado Fair 1931 95 350
FOUNTAIN CREEK Colorado Fair 1931 95 11,500
BURNT MILL ROAD Colorado Fair 1931 95 7,500
CF+I WATER LINES SR Colorado Fair 1931 95 474
SALT CREEK Colorado Fair 1931 95 474
LAMAR CANAL Colorado Fair 1931 95 13,000
KING ARROYO Colorado Fair 1931 95 1,844
ANDERSON ARROYO Colorado Poor 1931 95 3,981
THOMPSON ARROYO Colorado Fair 1931 95 1,600
WEST SALT WASH Colorado Poor 1931 95 131
MOORES CANYON CREEK Colorado Good 1931 95 3,033
BEAVER CREEK Colorado Fair 1932 94 1,400
DRAW Colorado Fair 1932 94 1,900
LITTLE COMANCHE CREEK Colorado Fair 1932 94 3,400
DRAW Colorado Good 1932 94 370
FOUNTAIN CREEK Colorado Fair 1932 94 1,300
DRAW Colorado Fair 1932 94 11,000
CHALK CREEK Colorado Fair 1932 94 7,553
DRAW Colorado Fair 1932 94 15,000
ROCKY FD. HIGHLINE CANAL Colorado Fair 1932 94 4,200
Dale Creek Colorado Poor 1932 94 16
FOUNTAIN CREEK Colorado Fair 1932 94 149
CANAL Colorado Poor 1932 94 380
Beaver Creek Colorado Fair 1932 94 55
ALAMOSA RIVER Colorado Fair 1933 93 18
GREGORY GULCH Colorado Fair 1933 93 3,289
HOME SUPPLY DITCH Colorado Fair 1933 93 4,900
HANDY DITCH Colorado Fair 1933 93 4,900
DRAW Colorado Fair 1933 93 4,900

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