US Bridges

US 50 Ml Ebnd over Thompson Arroyo

Fair

Otero County, Colorado · 2.6 MI E of JCT SH 109 · Structure no. M-23-E

Built
1957
68 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
93 ft
3 main spans
Daily traffic
1,600
2020 count
Owner
State
State Highway Agency

About this bridge

US 50 Ml Ebnd over Thompson Arroyo is a concrete tee beam carrying US 50 Ml Ebnd over Thompson Arroyo in Otero County, Colorado. It was built in 1957, so it is 68 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 1,600 vehicles a day, roughly 9% of them trucks, projected to reach 1,648 by 2040. The structure is 93 ft (28.3 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 50 Ml Ebnd
CrossesThompson Arroyo
Location2.6 MI E of JCT SH 109
RouteU.S. Route 50B
Coordinates37.99464, -103.4878
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating46.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span29 ft (8.8 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2020)
Projected traffic1,648 by 2040
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 50 Ml Ebnd over Thompson Arroyo built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 50 Ml Ebnd over Thompson Arroyo 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 August 2024.

How much traffic does US 50 Ml Ebnd over Thompson Arroyo carry?

About 1,600 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is US 50 Ml Ebnd over Thompson Arroyo?

The structure is 93 ft (28.3 m) long with a longest span of 29 ft (8.8 m) and a deck 34 ft wide.

Who owns US 50 Ml Ebnd over Thompson Arroyo?

It is owned by the State Highway Agency.