US Bridges

County Road C over Rio San Antonio

Good

Conejos County, Colorado · .3 MI E of CR 12.5 · Structure no. CON00.1W-04OSA

Built
1988
37 years old
Condition
Good
inspected March 2023
Type
Truss - Thru
Steel
Length
94 ft
1 main span
Daily traffic
126
2022 count
Owner
County
County Highway Agency

About this bridge

County Road C over Rio San Antonio is a steel truss - thru carrying County Road C over Rio San Antonio in Conejos County, Colorado. It was built in 1988, so it is 37 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 126 vehicles a day, projected to reach 145 by 2042. The structure is 94 ft (28.5 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road C
CrossesRio San Antonio
Location.3 MI E of CR 12.5
RouteCounty Highway 0
CountyConejos County
StateColorado
Coordinates37.02046, -106.02274
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating22.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length94 ft (28.5 m)
Longest span88 ft (26.8 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126 (2022)
Projected traffic145 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 C over Rio San Antonio built?

It was built in 1988, making it 37 years old in 2025.

What condition is County Road C over Rio San Antonio in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does County Road C over Rio San Antonio carry?

About 126 vehicles per day (2022 count).

How long is County Road C over Rio San Antonio?

The structure is 94 ft (28.5 m) long with a longest span of 88 ft (26.8 m) and a deck 26 ft wide.

Who owns County Road C over Rio San Antonio?

It is owned by the County Highway Agency.