US Bridges

E. 120th Ave. over Local Drainage

Good

Adams County, Colorado · 0.2 MI W of Haysmount RD · Structure no. ADA120-21.918

Built
2007
18 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
42 ft
2 main spans
Daily traffic
3,067
2021 count
Owner
County
County Highway Agency

About this bridge

E. 120th Ave. over Local Drainage is a concrete culvert carrying E. 120th Ave. over Local Drainage in Adams County, Colorado. It was built in 2007, so it is 18 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 3,067 vehicles a day, roughly 5% of them trucks, projected to reach 3,987 by 2041. The structure is 42 ft (12.7 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesE. 120th Ave.
CrossesLocal Drainage
Location0.2 MI W of Haysmount RD
RouteCounty Highway 0
CountyAdams County
StateColorado
Coordinates39.91386, -104.64417
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length42 ft (12.7 m)
Longest span20 ft (6.1 m)
Deck width53 ft (16.2 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,067 (2021)
Projected traffic3,987 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 E. 120th Ave. over Local Drainage built?

It was built in 2007, making it 18 years old in 2025.

What condition is E. 120th Ave. over Local Drainage 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 E. 120th Ave. over Local Drainage carry?

About 3,067 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is E. 120th Ave. over Local Drainage?

The structure is 42 ft (12.7 m) long with a longest span of 20 ft (6.1 m) and a deck 53 ft wide.

Who owns E. 120th Ave. over Local Drainage?

It is owned by the County Highway Agency.