US Bridges

Animas ST over Purgatoire River

Fair

Las Animas County, Colorado · Btw Nevada Ave &modic · Structure no. TP-18-C

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
225 ft
3 main spans
Daily traffic
2,088
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Animas ST over Purgatoire River is a prestressed concrete tee beam carrying Animas ST over Purgatoire River in Las Animas County, Colorado. It was built in 1962, so it is 63 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 2,088 vehicles a day, roughly 7% of them trucks, projected to reach 2,568 by 2042. The structure is 225 ft (68.6 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAnimas ST
CrossesPurgatoire River
LocationBtw Nevada Ave &modic
RouteCity Street 0
CountyLas Animas County
StateColorado
Coordinates37.16906, -104.50959
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length225 ft (68.6 m)
Longest span71 ft (21.6 m)
Deck width37 ft (11.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,088 (2022)
Projected traffic2,568 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Animas ST over Purgatoire River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Animas ST over Purgatoire River 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 June 2023.

How much traffic does Animas ST over Purgatoire River carry?

About 2,088 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Animas ST over Purgatoire River?

The structure is 225 ft (68.6 m) long with a longest span of 71 ft (21.6 m) and a deck 37 ft wide.

Who owns Animas ST over Purgatoire River?

It is owned by the City or Municipal Highway Agency.