US Bridges

US 287 Ml over Dry Creek

Fair

Boulder County, Colorado · 2.7 MI No of JCT SH 52 · Structure no. D-16-DN

Built
1990
35 years old
Condition
Fair
inspected September 2021
Type
Culvert
Concrete
Length
39 ft
2 main spans
Daily traffic
24,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 287 Ml over Dry Creek is a concrete culvert carrying US 287 Ml over Dry Creek in Boulder County, Colorado. It was built in 1990, so it is 35 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 24,000 vehicles a day, roughly 5% of them trucks, projected to reach 30,960 by 2040. The structure is 39 ft (11.9 m) long and 87 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 287 Ml
CrossesDry Creek
Location2.7 MI No of JCT SH 52
RouteU.S. Route 287C
Coordinates40.13238, -105.10238
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.2 US tons
Inventory rating33.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width87 ft (26.4 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,000 (2020)
Projected traffic30,960 by 2040
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Dry Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is US 287 Ml over Dry Creek 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 September 2021.

How much traffic does US 287 Ml over Dry Creek carry?

About 24,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is US 287 Ml over Dry Creek?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 87 ft wide.

Who owns US 287 Ml over Dry Creek?

It is owned by the State Highway Agency.