US Bridges

US 285 Ml over Willow Springs Road

Fair

Jefferson County, Colorado · 0.3 MI E of JCT SH 8 · Structure no. F-16-SH

Built
2008
17 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
96 ft
1 main span
Daily traffic
39,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 285 Ml over Willow Springs Road is a prestressed concrete stringer/multi-beam or girder carrying US 285 Ml over Willow Springs Road in Jefferson County, Colorado. It was built in 2008, so it is 17 years old, younger 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 39,000 vehicles a day, roughly 5% of them trucks, projected to reach 50,700 by 2040. The structure is 96 ft (29.3 m) long and 86 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesUS 285 Ml
CrossesWillow Springs Road
Location0.3 MI E of JCT SH 8
RouteU.S. Route 285D
CountyJefferson County
StateColorado
Coordinates39.62571, -105.18895
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating28.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length96 ft (29.3 m)
Longest span94 ft (28.5 m)
Deck width86 ft (26.2 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,000 (2020)
Projected traffic50,700 by 2040
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$2.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was US 285 Ml over Willow Springs Road built?

It was built in 2008, making it 17 years old in 2025.

What condition is US 285 Ml over Willow Springs Road 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 May 2023.

How much traffic does US 285 Ml over Willow Springs Road carry?

About 39,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is US 285 Ml over Willow Springs Road?

The structure is 96 ft (29.3 m) long with a longest span of 94 ft (28.5 m) and a deck 86 ft wide.

Who owns US 285 Ml over Willow Springs Road?

It is owned by the State Highway Agency.