US Bridges

County Road 39 over Colorado River

FairPosted for load

Grand County, Colorado · 0.8 MI So of US HWY 40 · Structure no. 49003900.80009

Built
1953
72 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
86
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Colorado River is a steel stringer/multi-beam or girder carrying County Road 39 over Colorado River in Grand County, Colorado. It was built in 1953, so it is 72 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 load restriction.

It carries about 86 vehicles a day, roughly 25% of them trucks, projected to reach 101 by 2042. The structure is 120 ft (36.7 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Road 39
CrossesColorado River
Location0.8 MI So of US HWY 40
RouteCounty Highway 0
CountyGrand County
StateColorado
Coordinates40.05369, -106.28964
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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.6 US tons
Inventory rating16 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length120 ft (36.7 m)
Longest span40 ft (12.1 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86 (2023)
Projected traffic101 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 39 over Colorado River built?

It was built in 1953, making it 72 years old in 2025.

What condition is County Road 39 over Colorado 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 September 2023.

How much traffic does County Road 39 over Colorado River carry?

About 86 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is County Road 39 over Colorado River?

The structure is 120 ft (36.7 m) long with a longest span of 40 ft (12.1 m) and a deck 20 ft wide.

Who owns County Road 39 over Colorado River?

It is owned by the County Highway Agency.