US Bridges

County Road 13 over Little Thompson River

Fair

Weld County, Colorado · 0.4 MI N of CO RD 44 · Structure no. WEL013.0-044.0B

Built
1966
59 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
4,115
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

County Road 13 over Little Thompson River is a steel stringer/multi-beam or girder carrying County Road 13 over Little Thompson River in Weld County, Colorado. It was built in 1966, so it is 59 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 5 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 4,115 vehicles a day, roughly 21% of them trucks, projected to reach 5,844 by 2042. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 13
CrossesLittle Thompson River
Location0.4 MI N of CO RD 44
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.31389, -104.94175
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span58 ft (17.8 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,115 (2023)
Projected traffic5,844 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$350,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 13 over Little Thompson River built?

It was built in 1966, making it 59 years old in 2025.

What condition is County Road 13 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 13 over Little Thompson River carry?

About 4,115 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is County Road 13 over Little Thompson River?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.8 m) and a deck 25 ft wide.

Who owns County Road 13 over Little Thompson River?

It is owned by the Town or Township Highway Agency.