US Bridges

County Road 60.5 over Lone Tree Creek

Poor

Weld County, Colorado · 4.7 MI E of JCT US 85 Byp · Structure no. WEL060.5-049.0A

Built
1967
58 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
165 ft
3 main spans
Daily traffic
749
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 60.5 over Lone Tree Creek is a steel continuous stringer/multi-beam or girder carrying County Road 60.5 over Lone Tree Creek in Weld County, Colorado. It was built in 1967, so it is 58 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 749 vehicles a day, roughly 27% of them trucks, projected to reach 1,064 by 2042. The structure is 165 ft (50.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 60.5
CrossesLone Tree Creek
Location4.7 MI E of JCT US 85 Byp
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.42817, -104.58976
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length165 ft (50.4 m)
Longest span57 ft (17.4 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic749 (2022)
Projected traffic1,064 by 2042
Trucks27%
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 60.5 over Lone Tree Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is County Road 60.5 over Lone Tree Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does County Road 60.5 over Lone Tree Creek carry?

About 749 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is County Road 60.5 over Lone Tree Creek?

The structure is 165 ft (50.4 m) long with a longest span of 57 ft (17.4 m) and a deck 34 ft wide.

Who owns County Road 60.5 over Lone Tree Creek?

It is owned by the County Highway Agency.