US Bridges

Main Street over Carbonate Creek

Fair

Gunnison County, Colorado · Just East of 1st Street · Structure no. MARBLE-MAIN-A

Built
1987
38 years old
Condition
Fair
inspected June 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
436
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Main Street over Carbonate Creek is a prestressed concrete slab carrying Main Street over Carbonate Creek in Gunnison County, Colorado. It was built in 1987, so it is 38 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 436 vehicles a day, roughly 2% of them trucks, projected to reach 506 by 2042. The structure is 45 ft (13.7 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMain Street
CrossesCarbonate Creek
LocationJust East of 1st Street
RouteCity Street 0
Coordinates39.07183, -107.18686
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span42 ft (12.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic436 (2022)
Projected traffic506 by 2042
Trucks2%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main Street over Carbonate Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Main Street over Carbonate Creek 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 June 2024.

How much traffic does Main Street over Carbonate Creek carry?

About 436 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Main Street over Carbonate Creek?

The structure is 45 ft (13.7 m) long with a longest span of 42 ft (12.8 m) and a deck 24 ft wide.

Who owns Main Street over Carbonate Creek?

It is owned by the Town or Township Highway Agency.