US Bridges

US 287 Ml over Ditch

Fair

Adams County, Colorado · 120th Ave in Westminster · Structure no. E-16-GI

Built
1965
60 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
35,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 287 Ml over Ditch is a concrete culvert carrying US 287 Ml over Ditch in Adams County, Colorado. It was built in 1965, so it is 60 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 35,000 vehicles a day, roughly 4% of them trucks, projected to reach 39,200 by 2040. The structure is 30 ft (9.1 m) long and 107 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 287 Ml
CrossesDitch
Location120th Ave in Westminster
RouteU.S. Route 287C
Coordinates39.91411, -105.03708
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span14 ft (4.3 m)
Deck width107 ft (32.5 m)
Roadway width99 ft (30.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,000 (2020)
Projected traffic39,200 by 2040
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 287 Ml over Ditch built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 287 Ml over Ditch 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 US 287 Ml over Ditch carry?

About 35,000 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is US 287 Ml over Ditch?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m) and a deck 107 ft wide.

Who owns US 287 Ml over Ditch?

It is owned by the State Highway Agency.