US Bridges

US 287 Ml over Little Thompson River

Good

Larimer County, Colorado · 5.1 MI N of JCT SH 66 · Structure no. C-16-DK

Built
1999
26 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
124 ft
1 main span
Daily traffic
18,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 287 Ml over Little Thompson River is a prestressed concrete stringer/multi-beam or girder carrying US 287 Ml over Little Thompson River in Larimer County, Colorado. It was built in 1999, so it is 26 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 18,000 vehicles a day, roughly 3% of them trucks, projected to reach 27,000 by 2040. The structure is 124 ft (37.9 m) long and 92 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 287 Ml
CrossesLittle Thompson River
Location5.1 MI N of JCT SH 66
RouteU.S. Route 287C
Coordinates40.27719, -105.10239
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.8 US tons
Inventory rating51.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length124 ft (37.9 m)
Longest span122 ft (37.1 m)
Deck width92 ft (27.9 m)
Roadway width89 ft (27.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2020)
Projected traffic27,000 by 2040
Trucks3%
Lanes on structure6
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 Little Thompson River built?

It was built in 1999, making it 26 years old in 2025.

What condition is US 287 Ml over Little Thompson River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does US 287 Ml over Little Thompson River carry?

About 18,000 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is US 287 Ml over Little Thompson River?

The structure is 124 ft (37.9 m) long with a longest span of 122 ft (37.1 m) and a deck 92 ft wide.

Who owns US 287 Ml over Little Thompson River?

It is owned by the State Highway Agency.