US Bridges

120th Avenue over Farmers Highline Cnl

Fair

Adams County, Colorado · 0.36 MI E of I-25 · Structure no. THN-120GRT-HLC

Built
1975
50 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
43,499
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

120th Avenue over Farmers Highline Cnl is a prestressed concrete tee beam carrying 120th Avenue over Farmers Highline Cnl in Adams County, Colorado. It was built in 1975, so it is 50 years old, older 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 43,499 vehicles a day, roughly 5% of them trucks, projected to reach 56,549 by 2041. The structure is 25 ft (7.6 m) long and 105 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries120th Avenue
CrossesFarmers Highline Cnl
Location0.36 MI E of I-25
RouteCity Street 0
Coordinates39.91411, -104.98297
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span21 ft (6.3 m)
Deck width105 ft (32 m)
Roadway width80 ft (24.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,499 (2021)
Projected traffic56,549 by 2041
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 120th Avenue over Farmers Highline Cnl built?

It was built in 1975, making it 50 years old in 2025.

What condition is 120th Avenue over Farmers Highline Cnl 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 January 2024.

How much traffic does 120th Avenue over Farmers Highline Cnl carry?

About 43,499 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is 120th Avenue over Farmers Highline Cnl?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.3 m) and a deck 105 ft wide.

Who owns 120th Avenue over Farmers Highline Cnl?

It is owned by the City or Municipal Highway Agency.