US Bridges

County Road 143 over Oak Creek

Fair

Fremont County, Colorado · 11.7 MI S of SH 115 · Structure no. FRCO 143-116A

Built
1945
80 years old, rebuilt 1991
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
242
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 143 over Oak Creek is a steel stringer/multi-beam or girder carrying County Road 143 over Oak Creek in Fremont County, Colorado. It was built in 1945 and reconstructed in 1991, so it is 80 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.

It carries about 242 vehicles a day, roughly 2% of them trucks, projected to reach 270 by 2042. The structure is 31 ft (9.5 m) long and 22 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesCounty Road 143
CrossesOak Creek
Location11.7 MI S of SH 115
RouteCounty Highway 0
CountyFremont County
StateColorado
Coordinates38.29802, -105.26216
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
Deck9 ExcellentNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating39.5 US tons
Inventory rating23.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span28 ft (8.4 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic242 (2022)
Projected traffic270 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 143 over Oak Creek built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1991.

What condition is County Road 143 over Oak 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 February 2025.

How much traffic does County Road 143 over Oak Creek carry?

About 242 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road 143 over Oak Creek?

The structure is 31 ft (9.5 m) long with a longest span of 28 ft (8.4 m) and a deck 22 ft wide.

Who owns County Road 143 over Oak Creek?

It is owned by the County Highway Agency.