US Bridges

US 93 over Big Creek

Fair

Ravalli County, Montana · 2M N Victor · Structure no. P00007061+06031

Built
2010
15 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
186 ft
2 main spans
Daily traffic
10,026
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Big Creek is a prestressed concrete stringer/multi-beam or girder carrying US 93 over Big Creek in Ravalli County, Montana. It was built in 2010, so it is 15 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 10,026 vehicles a day, roughly 2% of them trucks, projected to reach 10,878 by 2043. The structure is 186 ft (56.8 m) long and 76 ft wide. If it were closed, the detour would be 78.3 mi (126 km).

CarriesUS 93
CrossesBig Creek
Location2M N Victor
RouteU.S. Route 93
StateMontana
Coordinates46.45028, -114.13391
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length186 ft (56.8 m)
Longest span92 ft (28 m)
Deck width76 ft (23.2 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,026 (2023)
Projected traffic10,878 by 2043
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed78.3 mi (126 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$308,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Big Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is US 93 over Big 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 March 2024.

How much traffic does US 93 over Big Creek carry?

About 10,026 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 93 over Big Creek?

The structure is 186 ft (56.8 m) long with a longest span of 92 ft (28 m) and a deck 76 ft wide.

Who owns US 93 over Big Creek?

It is owned by the State Highway Agency.