US Bridges

County Road 66 over I 25 Ml

Fair

Las Animas County, Colorado · 3.3 MI N. of Aguilar · Structure no. O-18-BN

Built
1959
66 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete Continuous
Length
232 ft
4 main spans
Daily traffic
3
2022 count
Owner
State
State Highway Agency

About this bridge

County Road 66 over I 25 Ml is a concrete continuous tee beam carrying County Road 66 over I 25 Ml in Las Animas County, Colorado. It was built in 1959, so it is 66 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3 vehicles a day, projected to reach 4 by 2042. The structure is 232 ft (70.7 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCounty Road 66
CrossesI 25 Ml
Location3.3 MI N. of Aguilar
RouteCounty Highway 25A
CountyLas Animas County
StateColorado
Coordinates37.47091, -104.66271
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.7 US tons
Inventory rating29.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span66 ft (20 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3 (2022)
Projected traffic4 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 66 over I 25 Ml built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road 66 over I 25 Ml in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does County Road 66 over I 25 Ml carry?

About 3 vehicles per day (2022 count).

How long is County Road 66 over I 25 Ml?

The structure is 232 ft (70.7 m) long with a longest span of 66 ft (20 m) and a deck 24 ft wide.

Who owns County Road 66 over I 25 Ml?

It is owned by the State Highway Agency.