US Bridges

County Road 20.8 over I 25 Ml

Fair

Las Animas County, Colorado · In Trinidad · Structure no. P-18-AD

Built
1959
66 years old
Condition
Fair
inspected December 2024
Type
Frame
Concrete
Length
115 ft
2 main spans
Daily traffic
16,000
2018 count
Owner
State
State Highway Agency

About this bridge

County Road 20.8 over I 25 Ml is a concrete frame carrying County Road 20.8 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 5 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 16,000 vehicles a day, roughly 2% of them trucks, projected to reach 378 by 2034. The structure is 115 ft (34.9 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 20.8
CrossesI 25 Ml
LocationIn Trinidad
RouteCity Street 0
CountyLas Animas County
StateColorado
Coordinates37.16127, -104.51491
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.4 US tons
Inventory rating22.4 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length115 ft (34.9 m)
Longest span54 ft (16.5 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,000 (2018)
Projected traffic378 by 2034
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 20.8 over I 25 Ml built?

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

What condition is County Road 20.8 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 December 2024.

How much traffic does County Road 20.8 over I 25 Ml carry?

About 16,000 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is County Road 20.8 over I 25 Ml?

The structure is 115 ft (34.9 m) long with a longest span of 54 ft (16.5 m) and a deck 34 ft wide.

Who owns County Road 20.8 over I 25 Ml?

It is owned by the State Highway Agency.