US Bridges

County Road 46.5 over Little Thompson River

Fair

Weld County, Colorado · 0.4 MI E of CO RD 17 · Structure no. JSTWN-003

Built
1993
32 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
1,368
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

County Road 46.5 over Little Thompson River is a steel stringer/multi-beam or girder carrying County Road 46.5 over Little Thompson River in Weld County, Colorado. It was built in 1993, so it is 32 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 1,368 vehicles a day, roughly 16% of them trucks, projected to reach 1,942 by 2042. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Road 46.5
CrossesLittle Thompson River
Location0.4 MI E of CO RD 17
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.32719, -104.90002
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,368 (2023)
Projected traffic1,942 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 County Road 46.5 over Little Thompson River built?

It was built in 1993, making it 32 years old in 2025.

What condition is County Road 46.5 over Little Thompson River 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 April 2024.

How much traffic does County Road 46.5 over Little Thompson River carry?

About 1,368 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is County Road 46.5 over Little Thompson River?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.5 m) and a deck 32 ft wide.

Who owns County Road 46.5 over Little Thompson River?

It is owned by the City or Municipal Highway Agency.