US Bridges

S Willow Creek RD over South Willow Creek 064

Fair

Madison County, Montana · 4M S Pony · Structure no. L29020004+03001

Built
2003
22 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

S Willow Creek RD over South Willow Creek 064 is a prestressed concrete tee beam carrying S Willow Creek RD over South Willow Creek 064 in Madison County, Montana. It was built in 2003, so it is 22 years old, younger than the Montana average of 47 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 53 ft (16.2 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS Willow Creek RD
CrossesSouth Willow Creek 064
Location4M S Pony
RouteCounty Highway 29020
StateMontana
Coordinates45.62018, -111.865
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span51 ft (15.5 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 S Willow Creek RD over South Willow Creek 064 built?

It was built in 2003, making it 22 years old in 2025.

What condition is S Willow Creek RD over South Willow Creek 064 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 September 2024.

How much traffic does S Willow Creek RD over South Willow Creek 064 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is S Willow Creek RD over South Willow Creek 064?

The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 26 ft wide.

Who owns S Willow Creek RD over South Willow Creek 064?

It is owned by the County Highway Agency.