US Bridges

US 93 over Spring Creek

Good

Lake County, Montana · 3M S Ravalli · Structure no. P00005023+02251

Built
2006
19 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
99 ft
1 main span
Daily traffic
8,775
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Spring Creek is a prestressed concrete stringer/multi-beam or girder carrying US 93 over Spring Creek in Lake County, Montana. It was built in 2006, so it is 19 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,775 vehicles a day, roughly 5% of them trucks, projected to reach 9,214 by 2043. The structure is 99 ft (30.3 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 93
CrossesSpring Creek
Location3M S Ravalli
RouteU.S. Route 93
StateMontana
Coordinates47.22771, -114.14665
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating68 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length99 ft (30.3 m)
Longest span99 ft (30.3 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,775 (2023)
Projected traffic9,214 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Spring Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 93 over Spring Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does US 93 over Spring Creek carry?

About 8,775 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 93 over Spring Creek?

The structure is 99 ft (30.3 m) long with a longest span of 99 ft (30.3 m) and a deck 43 ft wide.

Who owns US 93 over Spring Creek?

It is owned by the State Highway Agency.