US Bridges

County Road 66 over Lone Tree Creek

Fair

Weld County, Colorado · 0.2 MI E of CO RD 49 · Structure no. WEL066.0-049.1A

Built
1985
40 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
22
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 66 over Lone Tree Creek is a steel stringer/multi-beam or girder carrying County Road 66 over Lone Tree Creek in Weld County, Colorado. It was built in 1985, so it is 40 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 22 vehicles a day, roughly 38% of them trucks, projected to reach 32 by 2041. The structure is 46 ft (14.1 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 66
CrossesLone Tree Creek
Location0.2 MI E of CO RD 49
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.46418, -104.59826
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 rating49.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length46 ft (14.1 m)
Longest span45 ft (13.6 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22 (2021)
Projected traffic32 by 2041
Trucks38%
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 66 over Lone Tree Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road 66 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 June 2024.

How much traffic does County Road 66 over Lone Tree Creek carry?

About 22 vehicles per day (2021 count), of which roughly 38% are trucks.

How long is County Road 66 over Lone Tree Creek?

The structure is 46 ft (14.1 m) long with a longest span of 45 ft (13.6 m) and a deck 32 ft wide.

Who owns County Road 66 over Lone Tree Creek?

It is owned by the County Highway Agency.