US Bridges

SH 17 Ml over Br. of Conejos River

Fair

Conejos County, Colorado · 4.6 MI W of Antonito · Structure no. P-12-G

Built
1958
67 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
70 ft
3 main spans
Daily traffic
960
2020 count
Owner
State
State Highway Agency

About this bridge

SH 17 Ml over Br. of Conejos River is a concrete tee beam carrying SH 17 Ml over Br. of Conejos River in Conejos County, Colorado. It was built in 1958, so it is 67 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 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 960 vehicles a day, roughly 7% of them trucks, projected to reach 979 by 2040. The structure is 70 ft (21.3 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSH 17 Ml
CrossesBr. of Conejos River
Location4.6 MI W of Antonito
RouteState Highway 17A
Coordinates37.06105, -106.09629
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.5 US tons
Inventory rating21.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length70 ft (21.3 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic960 (2020)
Projected traffic979 by 2040
Trucks7%
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

OwnerState Highway Agency
Maintained byState 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 SH 17 Ml over Br. of Conejos River built?

It was built in 1958, making it 67 years old in 2025.

What condition is SH 17 Ml over Br. of 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 July 2023.

How much traffic does SH 17 Ml over Br. of Conejos River carry?

About 960 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SH 17 Ml over Br. of Conejos River?

The structure is 70 ft (21.3 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns SH 17 Ml over Br. of Conejos River?

It is owned by the State Highway Agency.