US Bridges

County Road 73 over I 76 Ml

Fair

Weld County, Colorado · 16.4 MI NE of JCT SH 52 · Structure no. D-19-N

Built
1959
66 years old
Condition
Fair
inspected February 2025
Type
Tee Beam
Concrete Continuous
Length
268 ft
5 main spans
Daily traffic
731
2023 count
Owner
State
State Highway Agency

About this bridge

County Road 73 over I 76 Ml is a concrete continuous tee beam carrying County Road 73 over I 76 Ml in Weld County, Colorado. It was built in 1959, so it is 66 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 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 731 vehicles a day, roughly 10% of them trucks, projected to reach 1,037 by 2042. The structure is 268 ft (81.7 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesCounty Road 73
CrossesI 76 Ml
Location16.4 MI NE of JCT SH 52
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.16986, -104.37693
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span60 ft (18.4 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic731 (2023)
Projected traffic1,037 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 73 over I 76 Ml built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road 73 over I 76 Ml 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 February 2025.

How much traffic does County Road 73 over I 76 Ml carry?

About 731 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County Road 73 over I 76 Ml?

The structure is 268 ft (81.7 m) long with a longest span of 60 ft (18.4 m) and a deck 30 ft wide.

Who owns County Road 73 over I 76 Ml?

It is owned by the State Highway Agency.