US Bridges

County Road 64 over Willow Creek

Fair

Routt County, Colorado · 2.0 MI NW of CO RD 129 · Structure no. 107006402.30921

Built
1950
75 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
2 main spans
Daily traffic
487
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 64 over Willow Creek is a wood or timber stringer/multi-beam or girder carrying County Road 64 over Willow Creek in Routt County, Colorado. It was built in 1950, so it is 75 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 487 vehicles a day, roughly 19% of them trucks, projected to reach 579 by 2042. The structure is 53 ft (16.2 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 64
CrossesWillow Creek
Location2.0 MI NW of CO RD 129
RouteCounty Highway 0
CountyRoutt County
StateColorado
Coordinates40.73111, -106.87718
Functional classRural Minor 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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span23 ft (7.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic487 (2023)
Projected traffic579 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 64 over Willow Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Road 64 over Willow 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 October 2024.

How much traffic does County Road 64 over Willow Creek carry?

About 487 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is County Road 64 over Willow Creek?

The structure is 53 ft (16.2 m) long with a longest span of 23 ft (7.1 m) and a deck 25 ft wide.

Who owns County Road 64 over Willow Creek?

It is owned by the County Highway Agency.