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
LOUDEN DITCH Colorado Fair 1933 93 8,300
BARNES INLET CANAL Colorado Poor 1933 93 12,500
LA JARA CREEK Colorado Fair 1933 93 35
MIDDLE BOULDER CREEK Colorado Fair 1933 93 5,800
ELK CREEK Colorado Poor 1933 93 2,200
GYPSUM CREEK Colorado Fair 1933 93 9,390
DRAW Colorado Good 1933 93 9,390
SAND CREEK Colorado Fair 1933 93 21
DRAW Colorado Fair 1933 93 3,000
DEER CREEK Colorado Fair 1933 93 9,800
KING CREEK Colorado Fair 1933 93 9,800
DRAW Colorado Fair 1933 93 3,300
DRAW Colorado Fair 1933 93 3,300
DRAW Colorado Good 1933 93 3,300
DRAW Colorado Fair 1933 93 3,800
QUARTZ CREEK Colorado Fair 1933 93 3,000
RED CREEK Colorado Fair 1933 93 1,000
CUCHARAS RIVER Colorado Fair 1933 93 2,000
BEAR CREEK Colorado Poor 1933 93 1,900
BESSEMER DITCH Colorado Fair 1933 93 2,732
BESSEMER DITCH Colorado Fair 1933 93 403
FRENCHMAN CREEK Colorado Poor 1934 92 1,500
DRAW Colorado Poor 1934 92 1,500
DRY CREEK Colorado Poor 1934 92 35
LOVELAND-GREELEY CANAL Colorado Fair 1934 92 43,000
MILL CREEK SR Colorado Fair 1934 92 1,081
BLACK SQUIRREL CREEK Colorado Fair 1934 92 1,273
ALKALI CREEK Colorado Fair 1934 92 6,491
DRAW Colorado Fair 1934 92 4,000
PARACHUTE CREEK SR Colorado Poor 1934 92 3,100
KYLE RR Colorado Fair 1934 92 1,600
DRAW SR Colorado Fair 1934 92 86
DRAW Colorado Poor 1934 92 5,200
DRAW Colorado Fair 1934 92 3,000
DRAW Colorado Fair 1934 92 3,000
SPRING CREEK Colorado Fair 1934 92 5,600
DRAW Colorado Fair 1934 92 3,600
DRAW Colorado Fair 1934 92 3,600
CHERRY CREEK Colorado Fair 1934 92 3,600
DRAW Colorado Fair 1934 92 3,600
DRAW Colorado Fair 1934 92 3,600
DRAW Colorado Fair 1934 92 3,600
HOWARD CREEK Colorado Fair 1934 92 3,600
STOUT CREEK Colorado Fair 1934 92 3,600
TURKEY CREEK Colorado Fair 1934 92 4,900
MEREDITH CANAL Colorado Fair 1934 92 1,600
ROCKY FORD CANAL Colorado Fair 1934 92 2,300
Cache La Poudre River Colorado Fair 1934 92 240
CANAL Colorado Fair 1934 92 6,700
TOBE CREEK Colorado Fair 1934 92 130

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.