US Bridges

S 200 over Sagehen Creek

Fair

Garfield County, Montana · 3M E Mosby · Structure no. P00057161+02431

Built
1973
52 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
121 ft
2 main spans
Daily traffic
483
2023 count
Owner
State
State Highway Agency

About this bridge

S 200 over Sagehen Creek is a prestressed concrete stringer/multi-beam or girder carrying S 200 over Sagehen Creek in Garfield County, Montana. It was built in 1973, so it is 52 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 483 vehicles a day, roughly 15% of them trucks, projected to reach 507 by 2043. The structure is 121 ft (36.9 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 200
CrossesSagehen Creek
Location3M E Mosby
RouteState Highway 200
CountyGarfield County
StateMontana
Coordinates46.98946, -107.83141
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 rating61.9 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span60 ft (18.3 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic483 (2023)
Projected traffic507 by 2043
Trucks15%
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 200 over Sagehen Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is S 200 over Sagehen 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 April 2024.

How much traffic does S 200 over Sagehen Creek carry?

About 483 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is S 200 over Sagehen Creek?

The structure is 121 ft (36.9 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns S 200 over Sagehen Creek?

It is owned by the State Highway Agency.