US Bridges

Old Stage Road over Yellowstone River 077

Fair

Park County, Montana · 1M N Springdale · Structure no. S00563000+09061

Built
1980
45 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
472 ft
4 main spans
Daily traffic
104
2023 count
Owner
County
County Highway Agency

About this bridge

Old Stage Road over Yellowstone River 077 is a prestressed concrete stringer/multi-beam or girder carrying Old Stage Road over Yellowstone River 077 in Park County, Montana. It was built in 1980, so it is 45 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 5 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 104 vehicles a day, roughly 1% of them trucks, projected to reach 109 by 2043. The structure is 472 ft (143.8 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesOld Stage Road
CrossesYellowstone River 077
Location1M N Springdale
RouteCounty Highway 34563
StateMontana
Coordinates45.74396, -110.23277
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating28 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length472 ft (143.8 m)
Longest span121 ft (37 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104 (2023)
Projected traffic109 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Old Stage Road over Yellowstone River 077 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Old Stage Road over Yellowstone River 077 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 September 2024.

How much traffic does Old Stage Road over Yellowstone River 077 carry?

About 104 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Old Stage Road over Yellowstone River 077?

The structure is 472 ft (143.8 m) long with a longest span of 121 ft (37 m) and a deck 34 ft wide.

Who owns Old Stage Road over Yellowstone River 077?

It is owned by the County Highway Agency.