US Bridges

County Road 39 over Oak Creek

GoodPosted for load

Routt County, Colorado · 0.2 MI S of CO RD 35 · Structure no. 107003900.20944

Built
1984
41 years old
Condition
Good
inspected October 2024
Type
Arch - Deck
Aluminum, Wrought Iron, or Cast Iron
Length
28 ft
1 main span
Daily traffic
39
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Oak Creek is a aluminum, wrought iron, or cast iron arch - deck carrying County Road 39 over Oak Creek in Routt County, Colorado. It was built in 1984, so it is 41 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 39 vehicles a day, roughly 36% of them trucks, projected to reach 46 by 2042. The structure is 28 ft (8.4 m) long and 30 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesCounty Road 39
CrossesOak Creek
Location0.2 MI S of CO RD 35
RouteCounty Highway 0
Coordinates40.38487, -106.86353
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.8 US tons
Inventory rating21.4 US tons

Structure

Structure typeArch - Deck
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length28 ft (8.4 m)
Longest span28 ft (8.4 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2023)
Projected traffic46 by 2042
Trucks36%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 39 over Oak Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Road 39 over Oak Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does County Road 39 over Oak Creek carry?

About 39 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is County Road 39 over Oak Creek?

The structure is 28 ft (8.4 m) long with a longest span of 28 ft (8.4 m) and a deck 30 ft wide.

Who owns County Road 39 over Oak Creek?

It is owned by the County Highway Agency.