US Bridges

Irr# SH 140 Ml over LA Plata River

Fair

La Plata County, Colorado · 9 MI North of Red Mesa · Structure no. P-04-A

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
108 ft
3 main spans
Daily traffic
1,500
2020 count
Owner
State
State Highway Agency

About this bridge

Irr# SH 140 Ml over LA Plata River is a steel continuous stringer/multi-beam or girder carrying Irr# SH 140 Ml over LA Plata River in La Plata 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 5 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 1,785 by 2040. The structure is 108 ft (32.9 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesIrr# SH 140 Ml
CrossesLA Plata River
Location9 MI North of Red Mesa
RouteState Highway 140A
Coordinates37.20041, -108.07844
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.7 US tons
Inventory rating29.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length108 ft (32.9 m)
Longest span39 ft (12 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2020)
Projected traffic1,785 by 2040
Trucks10%
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 Irr# SH 140 Ml over LA Plata River built?

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

What condition is Irr# SH 140 Ml over LA Plata 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 May 2023.

How much traffic does Irr# SH 140 Ml over LA Plata River carry?

About 1,500 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Irr# SH 140 Ml over LA Plata River?

The structure is 108 ft (32.9 m) long with a longest span of 39 ft (12 m) and a deck 26 ft wide.

Who owns Irr# SH 140 Ml over LA Plata River?

It is owned by the State Highway Agency.