US Bridges

County RD 75.1 over Purgatoire River

Fair

Las Animas County, Colorado · .3 MI S of CR 32.0 · Structure no. LA751-38-15-50B

Built
1998
27 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
200 ft
3 main spans
Daily traffic
353
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 75.1 over Purgatoire River is a steel continuous stringer/multi-beam or girder carrying County RD 75.1 over Purgatoire River in Las Animas County, Colorado. It was built in 1998, so it is 27 years old, younger 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 353 vehicles a day, roughly 2% of them trucks, projected to reach 434 by 2042. The structure is 200 ft (61 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty RD 75.1
CrossesPurgatoire River
Location.3 MI S of CR 32.0
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.21562, -104.46467
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating106.8 US tons
Inventory rating63.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span74 ft (22.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic353 (2022)
Projected traffic434 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 RD 75.1 over Purgatoire River built?

It was built in 1998, making it 27 years old in 2025.

What condition is County RD 75.1 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 County RD 75.1 over Purgatoire River carry?

About 353 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County RD 75.1 over Purgatoire River?

The structure is 200 ft (61 m) long with a longest span of 74 ft (22.7 m) and a deck 32 ft wide.

Who owns County RD 75.1 over Purgatoire River?

It is owned by the County Highway Agency.