US Bridges

County Road 70 over Willow Creek

Fair

Moffat County, Colorado · 3.6 MI SW of CO RD 101 · Structure no. MOF70-03.59

Built
1955
70 years old, rebuilt 1990
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
35 ft
2 main spans
Daily traffic
14
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 70 over Willow Creek is a steel continuous stringer/multi-beam or girder carrying County Road 70 over Willow Creek in Moffat County, Colorado. It was built in 1955 and reconstructed in 1990, so it is 70 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 14 vehicles a day, roughly 33% of them trucks, projected to reach 16 by 2042. The structure is 35 ft (10.7 m) long and 17 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesCounty Road 70
CrossesWillow Creek
Location3.6 MI SW of CO RD 101
RouteCounty Highway 0
CountyMoffat County
StateColorado
Coordinates40.89878, -107.51271
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.4 US tons
Inventory rating12.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width17 ft (5.1 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14 (2023)
Projected traffic16 by 2042
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$125,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 70 over Willow Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1990.

What condition is County Road 70 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 2023.

How much traffic does County Road 70 over Willow Creek carry?

About 14 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is County Road 70 over Willow Creek?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m) and a deck 17 ft wide.

Who owns County Road 70 over Willow Creek?

It is owned by the County Highway Agency.