Bridge conditions in Adams County, Colorado 544 inventoried bridges · 41 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions 2025 National Bridge Inventory, FHWA Compiled August 20, 2026
The federal inventory lists 544 bridges in Adams County: 232 rated good, 271 fair, and 41 poor.
41 of the 544 bridges in Adams County, Colorado, are rated in poor condition (7.5%) in the 2025 National Bridge Inventory, as of August 20, 2026 .232 bridges (42.6%) are rated good and 271 (49.8%) fair.
The median Adams County bridge was built in 1994 .
The busiest poor-rated bridge is I 270 Ml Wbnd over South Platte River (built 1969), carrying about 48,500 vehicles a day.
Good 42.6% · Fair 49.8% · Poor 7.5% of 544 bridges
Bridges rated poor Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
Bridge Built Vehicles/day Condition I 270 Ml Wbnd over South Platte River 1969 48,500 Poor I 270 Ml Ebnd over South Platte River 1969 48,500 Poor I 270 Ml Wbnd over Ditch Rd Burlington Cana 1969 48,500 Poor I 270 Ebnd over E 64TH Ave Burlington C 1969 48,500 Poor I 270 Ml Wbnd over SH 265 Ml UP RR BNSF RR 1969 48,500 Poor I 270 Ml Wbnd over Service Rd BNSF RR 1970 48,500 Poor SH 6 Ml over Sand Creek 1940 40,000 Poor SH6 Ditch Rider Rd over Burlington Canal SR 1948 27,925 Poor 88TH Avenue over South Platte River 1960 25,590 Poor Tower Road over Third Creek 1970 18,738 Poor I 70 Ml Wbnd over County Roads 26N 105 1960 13,000 Poor I 70 Ml Ebnd over County Roads 26N 105 1960 13,000 Poor I 70 Ml Wbnd over County Roads 28N 113 1960 13,000 Poor I 70 Ml Ebnd over County Roads 28N 113 1960 13,000 Poor I 70 Ml Wbnd over County Roads 31N 125 1960 13,000 Poor I 70 Ml Ebnd over County Roads 31N 125 1960 13,000 Poor Mckay Road over South Platte River 1965 12,861 Poor York Street over I 270 Ml 1970 11,998 Poor Dahlia Street over I 76 Ml 1967 9,516 Poor Henderson Road over South Platte River 1970 9,367 Poor York Street over South Platte River 1963 8,359 Poor Laredo Street over Highline Canal 1970 5,975 Poor Tennyson Street over Clear Creek 1965 2,700 Poor Picadilly Road over Hudson Canal 1960 2,480 Poor Picadilly Road over Burlington Canal 1992 2,480 Poor Explorador Calle over Niver Creek 1970 1,764 Poor 160TH Avenue over Seep Canal 1960 1,539 Poor US 36 Ml over East Bijou Creek 1966 1,100 Poor 144TH Avenue over Local Drainage 1960 987 Poor 88TH Ave over Lost Creek 1995 856 Poor E 88TH Ave | Irond over Wolf Creek 1960 569 Poor E 88TH Ave | Irond over Kiowa Creek 1950 532 Poor Strasburg Road over Kiowa Creek 1960 299 Poor Potomac Street over Obrian Canal 1940 190 Poor Calhoun-byers Road over Bijou Creek 1965 165 Poor N Converse Road over Lost Creek Tributary 1960 118 Poor 56TH Avenue over Comanche Creek 1975 80 Poor Bradbury-krebs Rd over Spring Gulch 1977 78 Poor Hanks Crossing Rd over Muddy Creek 1960 46 Poor 88TH Ave over Box Elder Creek 1935 44 Poor 144TH Avenue over Lost Creek 1960 – Poor
Busiest bridges in the county Bridge Built Vehicles/day Condition Hov Ramp over I25 Access 1993 242,000 Good I 25 Ramp over Hov Ramp R 1998 242,000 Good I 25 Ml over 62ND Ave 1993 196,000 Fair I 25 Ml over UP RR 1993 196,000 Fair US 36 Ebnd Ml over I 25 Ml Ramps Hov Lanes 1994 168,000 Good I 25 Ml over Pedestrian Underpass 1955 154,000 Fair US 36 Hov over I25 Sbnd Ml and I25 Hov 1972 144,000 Fair US 36 Ml over SH 224 Ml/n Broadway 1986 144,000 Fair I 25 Ml over Farmers Highline Canal 1954 135,000 Fair US 36 Ml over Pecos Street 2001 129,000 Fair
Source: FHWA National Bridge Inventory , 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Colorado: Colorado bridge conditions by county · every download on the data page .
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected .