US Bridges

Imboden Road over Bear Gulch

Fair

Adams County, Colorado · 1.4 MI South of 88th Ave · Structure no. ADA25N-072.6132

Built
2002
23 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
1,895
2021 count
Owner
County
County Highway Agency

About this bridge

Imboden Road over Bear Gulch is a steel stringer/multi-beam or girder carrying Imboden Road over Bear Gulch in Adams County, Colorado. It was built in 2002, so it is 23 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 1,895 vehicles a day, roughly 10% of them trucks, projected to reach 2,463 by 2041. The structure is 30 ft (9.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesImboden Road
CrossesBear Gulch
Location1.4 MI South of 88th Ave
RouteCounty Highway 0
CountyAdams County
StateColorado
Coordinates39.83546, -104.58332
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
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 inspectionDecember 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length30 ft (9.2 m)
Longest span29 ft (8.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,895 (2021)
Projected traffic2,463 by 2041
Trucks10%
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 Imboden Road over Bear Gulch built?

It was built in 2002, making it 23 years old in 2025.

What condition is Imboden Road over Bear Gulch 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 December 2023.

How much traffic does Imboden Road over Bear Gulch carry?

About 1,895 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Imboden Road over Bear Gulch?

The structure is 30 ft (9.2 m) long with a longest span of 29 ft (8.7 m) and a deck 28 ft wide.

Who owns Imboden Road over Bear Gulch?

It is owned by the County Highway Agency.