US Bridges

County Road 17 over Conejos River

Good

Conejos County, Colorado · 2.0 MI S of CR M · Structure no. CON04.0E-03.1NA

Built
1991
34 years old
Condition
Good
inspected March 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
100 ft
3 main spans
Daily traffic
291
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 17 over Conejos River is a prestressed concrete box beam or girders - multiple carrying County Road 17 over Conejos River in Conejos County, Colorado. It was built in 1991, so it is 34 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 291 vehicles a day, roughly 2% of them trucks, projected to reach 335 by 2042. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 17
CrossesConejos River
Location2.0 MI S of CR M
RouteCounty Highway 0
Coordinates37.12361, -105.94647
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span36 ft (11.1 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic291 (2022)
Projected traffic335 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 17 over Conejos River built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 17 over Conejos River 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 2025.

How much traffic does County Road 17 over Conejos River carry?

About 291 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 17 over Conejos River?

The structure is 100 ft (30.5 m) long with a longest span of 36 ft (11.1 m) and a deck 30 ft wide.

Who owns County Road 17 over Conejos River?

It is owned by the County Highway Agency.