US Bridges

S 200S over Buffalo Spring Creek

Fair

McCone County, Montana · 4M SE Circle · Structure no. P00057283+06881

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
2 main spans
Daily traffic
971
2023 count
Owner
State
State Highway Agency

About this bridge

S 200S over Buffalo Spring Creek is a prestressed concrete stringer/multi-beam or girder carrying S 200S over Buffalo Spring Creek in McCone County, Montana. It was built in 1966, so it is 59 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 971 vehicles a day, roughly 18% of them trucks, projected to reach 1,029 by 2043. The structure is 93 ft (28.2 m) long and 38 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 200S
CrossesBuffalo Spring Creek
Location4M SE Circle
RouteState Highway 200
CountyMcCone County
StateMontana
Coordinates47.405, -105.50089
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length93 ft (28.2 m)
Longest span46 ft (14 m)
Deck width38 ft (11.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic971 (2023)
Projected traffic1,029 by 2043
Trucks18%
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 S 200S over Buffalo Spring Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is S 200S over Buffalo Spring 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 2023.

How much traffic does S 200S over Buffalo Spring Creek carry?

About 971 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is S 200S over Buffalo Spring Creek?

The structure is 93 ft (28.2 m) long with a longest span of 46 ft (14 m) and a deck 38 ft wide.

Who owns S 200S over Buffalo Spring Creek?

It is owned by the State Highway Agency.