US Bridges

US 85 Ml Nbnd over Co.Rd 39.5 UP RR

Fair

Weld County, Colorado · In Greeley · Structure no. C-18-BL

Built
1962
63 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
303 ft
4 main spans
Daily traffic
4,750
2020 count
Owner
State
State Highway Agency

About this bridge

US 85 Ml Nbnd over Co.Rd 39.5 UP RR is a steel continuous stringer/multi-beam or girder carrying US 85 Ml Nbnd over Co.Rd 39.5 UP RR in Weld County, Colorado. It was built in 1962, so it is 63 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 4,750 vehicles a day, roughly 16% of them trucks, projected to reach 5,605 by 2040. The structure is 303 ft (92.4 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 85 Ml Nbnd
CrossesCo.Rd 39.5 UP RR
LocationIn Greeley
RouteU.S. Route 85L
CountyWeld County
StateColorado
Coordinates40.44916, -104.69104
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.3 US tons
Inventory rating30.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length303 ft (92.4 m)
Longest span86 ft (26.2 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,750 (2020)
Projected traffic5,605 by 2040
Trucks16%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$557,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 85 Ml Nbnd over Co.Rd 39.5 UP RR built?

It was built in 1962, making it 63 years old in 2025.

What condition is US 85 Ml Nbnd over Co.Rd 39.5 UP 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 July 2023.

How much traffic does US 85 Ml Nbnd over Co.Rd 39.5 UP RR carry?

About 4,750 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is US 85 Ml Nbnd over Co.Rd 39.5 UP RR?

The structure is 303 ft (92.4 m) long with a longest span of 86 ft (26.2 m) and a deck 34 ft wide.

Who owns US 85 Ml Nbnd over Co.Rd 39.5 UP RR?

It is owned by the State Highway Agency.