US Bridges

County Road 45 over Lone Tree Creek

Fair

Weld County, Colorado · 0.6 MI N of ST HWY 392 · Structure no. WEL045.0-068.0B

Built
1976
49 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
133
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 45 over Lone Tree Creek is a steel stringer/multi-beam or girder carrying County Road 45 over Lone Tree Creek in Weld County, Colorado. It was built in 1976, so it is 49 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 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 133 vehicles a day, roughly 43% of them trucks, projected to reach 188 by 2043. The structure is 30 ft (9.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 45
CrossesLone Tree Creek
Location0.6 MI N of ST HWY 392
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.48799, -104.64013
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating51.3 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length30 ft (9.2 m)
Longest span28 ft (8.6 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2023)
Projected traffic188 by 2043
Trucks43%
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

OwnerCounty Highway Agency
Maintained byCounty 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 45 over Lone Tree Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is County Road 45 over Lone Tree 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 May 2024.

How much traffic does County Road 45 over Lone Tree Creek carry?

About 133 vehicles per day (2023 count), of which roughly 43% are trucks.

How long is County Road 45 over Lone Tree Creek?

The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.6 m) and a deck 32 ft wide.

Who owns County Road 45 over Lone Tree Creek?

It is owned by the County Highway Agency.