US Bridges

County Road 37 over Antelope Creek

Fair

Baca County, Colorado · .9 MI N of CR Hh · Structure no. BA38-38-30.7-85

Built
1960
65 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
40 ft
2 main spans
Daily traffic
89
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 37 over Antelope Creek is a steel continuous stringer/multi-beam or girder carrying County Road 37 over Antelope Creek in Baca County, Colorado. It was built in 1960, so it is 65 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 89 vehicles a day, projected to reach 115 by 2042. The structure is 40 ft (12.3 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 37
CrossesAntelope Creek
Location.9 MI N of CR Hh
RouteCounty Highway 0
CountyBaca County
StateColorado
Coordinates37.45406, -102.40081
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.2 US tons
Inventory rating16.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length40 ft (12.3 m)
Longest span18 ft (5.5 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89 (2022)
Projected traffic115 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Road 37 over Antelope Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is County Road 37 over Antelope Creek 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 April 2024.

How much traffic does County Road 37 over Antelope Creek carry?

About 89 vehicles per day (2022 count).

How long is County Road 37 over Antelope Creek?

The structure is 40 ft (12.3 m) long with a longest span of 18 ft (5.5 m) and a deck 28 ft wide.

Who owns County Road 37 over Antelope Creek?

It is owned by the County Highway Agency.