US Bridges

County Road 12W over Hell Creek

Fair

Jackson County, Colorado · 8.2 MI W of ST HWY 14 · Structure no. 057012W08.2007A

Built
1986
39 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
41 ft
3 main spans
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 12W over Hell Creek is a steel continuous stringer/multi-beam or girder carrying County Road 12W over Hell Creek in Jackson 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 110 vehicles a day, roughly 23% of them trucks, projected to reach 143 by 2043. The structure is 41 ft (12.4 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 12W
CrossesHell Creek
Location8.2 MI W of ST HWY 14
RouteCounty Highway 0
CountyJackson County
StateColorado
Coordinates40.73421, -106.42352
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.9 US tons
Inventory rating32.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length41 ft (12.4 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic143 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 12W over Hell Creek built?

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

What condition is County Road 12W over Hell 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 November 2024.

How much traffic does County Road 12W over Hell Creek carry?

About 110 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is County Road 12W over Hell Creek?

The structure is 41 ft (12.4 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns County Road 12W over Hell Creek?

It is owned by the County Highway Agency.