US Bridges

S 322 over Little Beaver Creek

Fair

Fallon County, Montana · 16M S Baker · Structure no. S00322011+01131

Built
1992
33 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
178 ft
2 main spans
Daily traffic
42
2023 count
Owner
State
State Highway Agency

About this bridge

S 322 over Little Beaver Creek is a prestressed concrete stringer/multi-beam or girder carrying S 322 over Little Beaver Creek in Fallon County, Montana. It was built in 1992, so it is 33 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 42 vehicles a day, projected to reach 44 by 2043. The structure is 178 ft (54.4 m) long and 30 ft wide. If it were closed, the detour would be 47.2 mi (76 km).

Location

Open in Google Maps
CarriesS 322
CrossesLittle Beaver Creek
Location16M S Baker
RouteState Highway 322
CountyFallon County
StateMontana
Coordinates46.14072, -104.24239
Functional classRural Major 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 protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length178 ft (54.4 m)
Longest span89 ft (27.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42 (2023)
Projected traffic44 by 2043
Trucks0%
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

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 S 322 over Little Beaver Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is S 322 over Little Beaver 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 October 2023.

How much traffic does S 322 over Little Beaver Creek carry?

About 42 vehicles per day (2023 count).

How long is S 322 over Little Beaver Creek?

The structure is 178 ft (54.4 m) long with a longest span of 89 ft (27.1 m) and a deck 30 ft wide.

Who owns S 322 over Little Beaver Creek?

It is owned by the State Highway Agency.