US Bridges

County Road 17 over Little Thompson River

Fair

Weld County, Colorado · 0.9 MI N of CO RD 44 · Structure no. JSTWN-001

Built
1987
38 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
5,666
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

County Road 17 over Little Thompson River is a prestressed concrete tee beam carrying County Road 17 over Little Thompson River in Weld County, Colorado. It was built in 1987, so it is 38 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 5,666 vehicles a day, roughly 23% of them trucks, projected to reach 8,046 by 2043. The structure is 77 ft (23.5 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 17
CrossesLittle Thompson River
Location0.9 MI N of CO RD 44
RouteCity Street 0
Coordinates40.31889, -104.90594
Functional classUrban Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating28.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span72 ft (21.8 m)
Deck width43 ft (13.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,666 (2023)
Projected traffic8,046 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 17 over Little Thompson River built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road 17 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 17 over Little Thompson River carry?

About 5,666 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is County Road 17 over Little Thompson River?

The structure is 77 ft (23.5 m) long with a longest span of 72 ft (21.8 m) and a deck 43 ft wide.

Who owns County Road 17 over Little Thompson River?

It is owned by the City or Municipal Highway Agency.