US Bridges

County Road 12A over North Fork White River

Fair

Rio Blanco County, Colorado · 0.1 MI S of CO RD 8 · Structure no. RIOB-12A-01.80

Built
1986
39 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
73 ft
1 main span
Daily traffic
91
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 12A over North Fork White River is a steel stringer/multi-beam or girder carrying County Road 12A over North Fork White River in Rio Blanco County, Colorado. It was built in 1986, so it is 39 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 91 vehicles a day, roughly 42% of them trucks, projected to reach 109 by 2043. The structure is 73 ft (22.3 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 12A
CrossesNorth Fork White River
Location0.1 MI S of CO RD 8
RouteCounty Highway 0
Coordinates40.04411, -107.49689
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.4 US tons
Inventory rating11 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span72 ft (21.8 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic91 (2023)
Projected traffic109 by 2043
Trucks42%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 12A over North Fork White River built?

It was built in 1986, making it 39 years old in 2025.

What condition is County Road 12A over North Fork White 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 2024.

How much traffic does County Road 12A over North Fork White River carry?

About 91 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is County Road 12A over North Fork White River?

The structure is 73 ft (22.3 m) long with a longest span of 72 ft (21.8 m) and a deck 28 ft wide.

Who owns County Road 12A over North Fork White River?

It is owned by the County Highway Agency.