US Bridges

County Road 40 over Willow Creek Spillway

FairPosted for load

Grand County, Colorado · 8 MI from Granby CO · Structure no. ECA-BT-003

Built
1953
72 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
45 ft
1 main span
Daily traffic
50
2019 count
Owner
Federal
Bureau of Reclamation

About this bridge

County Road 40 over Willow Creek Spillway is a concrete tee beam carrying County Road 40 over Willow Creek Spillway in Grand County, Colorado. It was built in 1953, so it is 72 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 60 by 2041. The structure is 45 ft (13.8 m) long and 14 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesCounty Road 40
CrossesWillow Creek Spillway
Location8 MI from Granby CO
RouteCounty Highway 40
CountyGrand County
StateColorado
Coordinates40.14784, -105.94098
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating22.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length45 ft (13.8 m)
Longest span43 ft (13 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic60 by 2041
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 40 over Willow Creek Spillway built?

It was built in 1953, making it 72 years old in 2025.

What condition is County Road 40 over Willow Creek Spillway 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 April 2023.

How much traffic does County Road 40 over Willow Creek Spillway carry?

About 50 vehicles per day (2019 count).

How long is County Road 40 over Willow Creek Spillway?

The structure is 45 ft (13.8 m) long with a longest span of 43 ft (13 m) and a deck 14 ft wide.

Who owns County Road 40 over Willow Creek Spillway?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.