US Bridges

SH 17 Ml over Conejos River Ovflw

Good

Conejos County, Colorado · 5 MI W. of Antonito · Structure no. P-12-N

Built
1958
67 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
960
2020 count
Owner
State
State Highway Agency

About this bridge

SH 17 Ml over Conejos River Ovflw is a concrete culvert carrying SH 17 Ml over Conejos River Ovflw 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 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 960 vehicles a day, roughly 7% of them trucks, projected to reach 979 by 2040. The structure is 25 ft (7.6 m) long and 48 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSH 17 Ml
CrossesConejos River Ovflw
Location5 MI W. of Antonito
RouteState Highway 17A
Coordinates37.06411, -106.1001
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.8 US tons
Inventory rating32.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width48 ft (14.6 m)
Roadway width0 ft (0 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 Conejos River Ovflw built?

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

What condition is SH 17 Ml over Conejos River Ovflw 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 July 2023.

How much traffic does SH 17 Ml over Conejos River Ovflw carry?

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

How long is SH 17 Ml over Conejos River Ovflw?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 48 ft wide.

Who owns SH 17 Ml over Conejos River Ovflw?

It is owned by the State Highway Agency.