US Bridges

Fish Creek RD over Int Fish Creek-I 90 009

Fair

Mineral County, Montana · 4M E Tarkio · Structure no. L31170003+05001

Built
1965
60 years old, rebuilt 1981
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
274 ft
4 main spans
Daily traffic
356
2023 count
Owner
State
State Highway Agency

About this bridge

Fish Creek RD over Int Fish Creek-I 90 009 is a prestressed concrete stringer/multi-beam or girder carrying Fish Creek RD over Int Fish Creek-I 90 009 in Mineral County, Montana. It was built in 1965 and reconstructed in 1981, so it is 60 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 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 356 vehicles a day, roughly 3% of them trucks, projected to reach 381 by 2043. The structure is 274 ft (83.5 m) long and 27 ft wide.

CarriesFish Creek RD
CrossesInt Fish Creek-I 90 009
Location4M E Tarkio
RouteCounty Highway 31170
StateMontana
Coordinates47.01795, -114.64629
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating27 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length274 ft (83.5 m)
Longest span77 ft (23.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic356 (2023)
Projected traffic381 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fish Creek RD over Int Fish Creek-I 90 009 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1981.

What condition is Fish Creek RD over Int Fish Creek-I 90 009 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 2023.

How much traffic does Fish Creek RD over Int Fish Creek-I 90 009 carry?

About 356 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Fish Creek RD over Int Fish Creek-I 90 009?

The structure is 274 ft (83.5 m) long with a longest span of 77 ft (23.5 m) and a deck 27 ft wide.

Who owns Fish Creek RD over Int Fish Creek-I 90 009?

It is owned by the State Highway Agency.