US Bridges

County Road 4 over I 76 Ml BNSF RR

Fair

Weld County, Colorado · 2.8 Miles NE of JCT SH 7 · Structure no. D-18-BN

Built
1981
44 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
609 ft
5 main spans
Daily traffic
885
2023 count
Owner
State
State Highway Agency

About this bridge

County Road 4 over I 76 Ml BNSF RR is a steel continuous stringer/multi-beam or girder carrying County Road 4 over I 76 Ml BNSF RR in Weld County, Colorado. It was built in 1981, so it is 44 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 885 vehicles a day, roughly 10% of them trucks, projected to reach 1,256 by 2042. The structure is 609 ft (185.7 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 4
CrossesI 76 Ml BNSF RR
Location2.8 Miles NE of JCT SH 7
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.01503, -104.69977
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.4 US tons
Inventory rating20.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length609 ft (185.7 m)
Longest span151 ft (45.9 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic885 (2023)
Projected traffic1,256 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed6.2 mi (10 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 4 over I 76 Ml BNSF RR built?

It was built in 1981, making it 44 years old in 2025.

What condition is County Road 4 over I 76 Ml BNSF RR 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 November 2024.

How much traffic does County Road 4 over I 76 Ml BNSF RR carry?

About 885 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County Road 4 over I 76 Ml BNSF RR?

The structure is 609 ft (185.7 m) long with a longest span of 151 ft (45.9 m) and a deck 36 ft wide.

Who owns County Road 4 over I 76 Ml BNSF RR?

It is owned by the State Highway Agency.