US Bridges

Old US 10 over Coulee Creek 023

Fair

Stillwater County, Montana · 7M E Reed Point · Structure no. L48244008+04001

Built
1931
94 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
67 ft
1 main span
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Old US 10 over Coulee Creek 023 is a concrete tee beam carrying Old US 10 over Coulee Creek 023 in Stillwater County, Montana. It was built in 1931, so it is 94 years old, older 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 67 ft (20.3 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesOld US 10
CrossesCoulee Creek 023
Location7M E Reed Point
RouteState Highway 48244
StateMontana
Coordinates45.69783, -109.40632
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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length67 ft (20.3 m)
Longest span30 ft (9.1 m)
Deck width23 ft (7 m)
Roadway width21 ft (6.4 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

OwnerState Highway Agency
Maintained byState 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 Old US 10 over Coulee Creek 023 built?

It was built in 1931, making it 94 years old in 2025.

What condition is Old US 10 over Coulee Creek 023 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 February 2024.

How much traffic does Old US 10 over Coulee Creek 023 carry?

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

How long is Old US 10 over Coulee Creek 023?

The structure is 67 ft (20.3 m) long with a longest span of 30 ft (9.1 m) and a deck 23 ft wide.

Who owns Old US 10 over Coulee Creek 023?

It is owned by the State Highway Agency.