US Bridges

80th Avenue over Lost Creek Tributary

Good

Adams County, Colorado · 0.1 MI E of Converse RD · Structure no. ADA080-33.1N136

Built
1993
32 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
32
2021 count
Owner
County
County Highway Agency

About this bridge

80th Avenue over Lost Creek Tributary is a steel stringer/multi-beam or girder carrying 80th Avenue over Lost Creek Tributary in Adams County, Colorado. It was built in 1993, so it is 32 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32 vehicles a day, roughly 5% of them trucks, projected to reach 42 by 2041. The structure is 24 ft (7.4 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries80th Avenue
CrossesLost Creek Tributary
Location0.1 MI E of Converse RD
RouteCounty Highway 0
Coordinates39.83963, -104.43069
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.7 US tons
Inventory rating29.2 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span23 ft (6.9 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2021)
Projected traffic42 by 2041
Trucks5%
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 80th Avenue over Lost Creek Tributary built?

It was built in 1993, making it 32 years old in 2025.

What condition is 80th Avenue over Lost Creek Tributary in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does 80th Avenue over Lost Creek Tributary carry?

About 32 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is 80th Avenue over Lost Creek Tributary?

The structure is 24 ft (7.4 m) long with a longest span of 23 ft (6.9 m) and a deck 24 ft wide.

Who owns 80th Avenue over Lost Creek Tributary?

It is owned by the County Highway Agency.