US Bridges

Smith River Road over Sheep Creek 003

Fair

Meagher County, Montana · 10M N Fort Logan · Structure no. L30019010+01001

Built
1979
46 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
133
2023 count
Owner
County
County Highway Agency

About this bridge

Smith River Road over Sheep Creek 003 is a prestressed concrete tee beam carrying Smith River Road over Sheep Creek 003 in Meagher County, Montana. It was built in 1979, so it is 46 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 133 vehicles a day, roughly 3% of them trucks, projected to reach 142 by 2043. The structure is 70 ft (21.3 m) long and 27 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

CarriesSmith River Road
CrossesSheep Creek 003
Location10M N Fort Logan
RouteCounty Highway 30004
StateMontana
Coordinates46.80748, -111.15864
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating23.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133 (2023)
Projected traffic142 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.2 mi (76 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 Smith River Road over Sheep Creek 003 built?

It was built in 1979, making it 46 years old in 2025.

What condition is Smith River Road over Sheep Creek 003 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 June 2023.

How much traffic does Smith River Road over Sheep Creek 003 carry?

About 133 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Smith River Road over Sheep Creek 003?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 27 ft wide.

Who owns Smith River Road over Sheep Creek 003?

It is owned by the County Highway Agency.