US Bridges

Main ST over Mancos River

Fair

Montezuma County, Colorado · 0.1 MI South of 160B · Structure no. MANCOS-1A

Built
2021
4 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
1,744
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Main ST over Mancos River is a prestressed concrete box beam or girders - multiple carrying Main ST over Mancos River in Montezuma County, Colorado. It was built in 2021, so it is 4 years old, younger 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 6 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 1,744 vehicles a day, roughly 4% of them trucks, projected to reach 2,476 by 2037. The structure is 56 ft (17.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain ST
CrossesMancos River
Location0.1 MI South of 160B
RouteCity Street 0
CountyMontezuma County
StateColorado
Coordinates37.34466, -108.28901
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
Deck9 ExcellentNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating57.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length56 ft (17.1 m)
Longest span50 ft (15.2 m)
Deck width43 ft (13.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,744 (2017)
Projected traffic2,476 by 2037
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Main ST over Mancos River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Main ST over Mancos 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 November 2024.

How much traffic does Main ST over Mancos River carry?

About 1,744 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is Main ST over Mancos River?

The structure is 56 ft (17.1 m) long with a longest span of 50 ft (15.2 m) and a deck 43 ft wide.

Who owns Main ST over Mancos River?

It is owned by the Town or Township Highway Agency.