US Bridges

County Road 1 over Crosby Creek

Fair

Jackson County, Colorado · 2.5 MI S of CR 24 · Structure no. 0570S0102.50027

Built
1987
38 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
9
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 1 over Crosby Creek is a steel stringer/multi-beam or girder carrying County Road 1 over Crosby Creek in Jackson County, Colorado. It was built in 1987, so it is 38 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 6 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 9 vehicles a day, roughly 21% of them trucks, projected to reach 12 by 2042. The structure is 25 ft (7.7 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 1
CrossesCrosby Creek
Location2.5 MI S of CR 24
RouteCounty Highway 0
CountyJackson County
StateColorado
Coordinates40.5294, -106.58136
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.8 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span21 ft (6.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2023)
Projected traffic12 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 1 over Crosby Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road 1 over Crosby 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 1 over Crosby Creek carry?

About 9 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is County Road 1 over Crosby Creek?

The structure is 25 ft (7.7 m) long with a longest span of 21 ft (6.5 m) and a deck 24 ft wide.

Who owns County Road 1 over Crosby Creek?

It is owned by the County Highway Agency.