US Bridges

County Road 12 over Marvine Creek

Fair

Rio Blanco County, Colorado · 2.47 MI E of CO RD 8 · Structure no. RIOB-012-02.47

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
86
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 12 over Marvine Creek is a steel stringer/multi-beam or girder carrying County Road 12 over Marvine Creek in Rio Blanco County, Colorado. It was built in 1985, so it is 40 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 5 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 86 vehicles a day, roughly 37% of them trucks, projected to reach 103 by 2043. The structure is 31 ft (9.3 m) long and 28 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesCounty Road 12
CrossesMarvine Creek
Location2.47 MI E of CO RD 8
RouteCounty Highway 0
CountyRio Blanco County
StateColorado
Coordinates40.03875, -107.48802
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.3 US tons
Inventory rating16.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86 (2023)
Projected traffic103 by 2043
Trucks37%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 12 over Marvine Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road 12 over Marvine 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 September 2024.

How much traffic does County Road 12 over Marvine Creek carry?

About 86 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is County Road 12 over Marvine Creek?

The structure is 31 ft (9.3 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns County Road 12 over Marvine Creek?

It is owned by the County Highway Agency.