US Bridges

US 50 Ml over Gunnison/Blue Mesa Res

FairPosted for load

Gunnison County, Colorado · 3 MI E/Sapinero/Mid Bridg · Structure no. K-07-B

Built
1963
62 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
1,530 ft
3 main spans
Daily traffic
2,800
2020 count
Owner
State
State Highway Agency

About this bridge

US 50 Ml over Gunnison/Blue Mesa Res is a steel continuous girder and floorbeam system carrying US 50 Ml over Gunnison/Blue Mesa Res in Gunnison County, Colorado. It was built in 1963, so it is 62 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. Its operating status is: posted for other load-capacity restriction.

It carries about 2,800 vehicles a day, roughly 13% of them trucks, projected to reach 3,108 by 2040. The structure is 1,530 ft (466.4 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesUS 50 Ml
CrossesGunnison/Blue Mesa Res
Location3 MI E/Sapinero/Mid Bridg
RouteU.S. Route 50A
Coordinates38.46599, -107.25417
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.
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+7 approach)
Design loadHS 20
Structure length1,530 ft (466.4 m)
Longest span361 ft (109.9 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2020)
Projected traffic3,108 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 over Gunnison/Blue Mesa Res built?

It was built in 1963, making it 62 years old in 2025.

What condition is US 50 Ml over Gunnison/Blue Mesa Res 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 September 2024.

How much traffic does US 50 Ml over Gunnison/Blue Mesa Res carry?

About 2,800 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is US 50 Ml over Gunnison/Blue Mesa Res?

The structure is 1,530 ft (466.4 m) long with a longest span of 361 ft (109.9 m) and a deck 34 ft wide.

Who owns US 50 Ml over Gunnison/Blue Mesa Res?

It is owned by the State Highway Agency.