US Bridges

County Road 17.5 over N. Branch Conejos River

Fair

Conejos County, Colorado · .3 MI S of CR N · Structure no. CON04.5E-05.5NA

Built
1989
36 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
59
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 17.5 over N. Branch Conejos River is a steel stringer/multi-beam or girder carrying County Road 17.5 over N. Branch Conejos River in Conejos County, Colorado. It was built in 1989, so it is 36 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 59 vehicles a day, projected to reach 68 by 2042. The structure is 42 ft (12.7 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCounty Road 17.5
CrossesN. Branch Conejos River
Location.3 MI S of CR N
RouteCounty Highway 0
CountyConejos County
StateColorado
Coordinates37.16155, -105.93733
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.6 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length42 ft (12.7 m)
Longest span38 ft (11.7 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2022)
Projected traffic68 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 17.5 over N. Branch Conejos River built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Road 17.5 over N. Branch Conejos 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 March 2025.

How much traffic does County Road 17.5 over N. Branch Conejos River carry?

About 59 vehicles per day (2022 count).

How long is County Road 17.5 over N. Branch Conejos River?

The structure is 42 ft (12.7 m) long with a longest span of 38 ft (11.7 m) and a deck 31 ft wide.

Who owns County Road 17.5 over N. Branch Conejos River?

It is owned by the County Highway Agency.