US Bridges

SH 142 Ml over Conejos River

Good

Conejos County, Colorado · 2 M E of Manassa · Structure no. P-13-AA

Built
1984
41 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
105 ft
2 main spans
Daily traffic
530
2020 count
Owner
State
State Highway Agency

About this bridge

SH 142 Ml over Conejos River is a steel continuous stringer/multi-beam or girder carrying SH 142 Ml over Conejos River in Conejos County, Colorado. It was built in 1984, so it is 41 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 530 vehicles a day, roughly 13% of them trucks, projected to reach 625 by 2040. The structure is 105 ft (32 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSH 142 Ml
CrossesConejos River
Location2 M E of Manassa
RouteState Highway 142A
Coordinates37.17367, -105.89804
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating104.3 US tons
Inventory rating62.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length105 ft (32 m)
Longest span52 ft (16 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2020)
Projected traffic625 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 142 Ml over Conejos River built?

It was built in 1984, making it 41 years old in 2025.

What condition is SH 142 Ml 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 February 2023.

How much traffic does SH 142 Ml over Conejos River carry?

About 530 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is SH 142 Ml over Conejos River?

The structure is 105 ft (32 m) long with a longest span of 52 ft (16 m) and a deck 36 ft wide.

Who owns SH 142 Ml over Conejos River?

It is owned by the State Highway Agency.