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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
PREWITT OUTLET CANAL Colorado Fair 1941 85 1,000
CROOKED CREEK Colorado Poor 1941 85 11,000
CLEAR CREEK Colorado Fair 1941 85 38,000
UP RR Colorado Poor 1941 85 1,600
COCHETOPA CREEK Colorado Poor 1941 85 470
DRAW Colorado Fair 1941 85 470
CATLIN CANAL Colorado Fair 1941 85 650
OTERO CANAL Colorado Fair 1941 85 650
HIGHLINE CANAL Colorado Fair 1941 85 460
ROCKY FORD CANAL Colorado Fair 1941 85 596
Green Mtn Dam Spillway Colorado Fair 1942 84 100
DRAINAGE Colorado Poor 1942 84 1,100
DRAINAGE Colorado Fair 1942 84 1,100
DRAINAGE Colorado Poor 1942 84 1,100
UP RR Colorado Poor 1942 84 3,500
FRASER RIVER Colorado Fair 1942 84 11,000
MCINTYRE GULCH Colorado Fair 1942 84 101,000
FARMERS HIGHLINE CANAL Colorado Fair 1942 84 3,803
OHIO CREEK Colorado Poor 1942 84 45
SAN MIGUEL RIVER Colorado Fair 1942 84 1,800
SIX MILE CREEK Colorado Poor 1942 84 2,000
E. Fork of Turkey Creek Colorado Fair 1942 84 50
Drainage Ditch Colorado Fair 1942 84 5,600
B Ditch Colorado Poor 1942 84 30
DRAW Colorado Poor 1943 83 2,300
Dolores River Colorado Fair 1945 81 50
LOS PINOS RIVER Colorado Fair 1945 81 2,112
BOULDER CREEK Colorado Fair 1945 81 43
BEAR CREEK Colorado Fair 1945 81 27
UNNAMED CREEK Colorado Fair 1945 81 9
SOUTH ARKANSAS RIVER Colorado Fair 1945 81 277
OAK CREEK Colorado Fair 1945 81 242
COLORADO RIVER Colorado Poor 1945 81 1,200
Colorado N. Channel Colorado Fair 1945 81 1,200
West Divide Creek Colorado Fair 1945 81 27
WILLIS CREEK Colorado Good 1945 81 280
GURULE ARROYO Colorado Poor 1945 81 14
FEEDER DITCH Colorado Poor 1945 81 47
BEAR CREEK Colorado Fair 1945 81 102
ROCKY FORD HIGHLINE CANA Colorado Fair 1945 81 64
WASH Colorado Fair 1946 80 550
FINDLEY GULCH Colorado Fair 1946 80 550
DRAW Colorado Good 1946 80 550
TURKEY CREEK Colorado Fair 1946 80 4,100
DRY CREEK Colorado Fair 1947 79 305
NORTH STERLING CANAL Colorado Fair 1947 79 3,500
GREELEY-LOVELAND DITCH Colorado Good 1947 79 38,000
GREELEY CANAL NO 3 Colorado Fair 1947 79 4,350
CONEJOS RIVER Colorado Poor 1947 79 136
CONEJOS RIVER Colorado Fair 1947 79 68

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