US Bridges

Scott ST over RR

Fair

Missoula County, Montana · Missoula-Scott ST · Structure no. U08109000+04771

Built
1979
46 years old, rebuilt 2009
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,024 ft
2 main spans
Daily traffic
6,636
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Scott ST over RR is a steel continuous stringer/multi-beam or girder carrying Scott ST over RR in Missoula County, Montana. It was built in 1979 and reconstructed in 2009, so it is 46 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 6,636 vehicles a day, roughly 1% of them trucks, projected to reach 7,233 by 2043. The structure is 1,024 ft (312.2 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesScott ST
CrossesRR
LocationMissoula-Scott ST
RouteCity Street 8109
CountyMissoula County
StateMontana
Coordinates46.883, -114.00625
Functional classUrban 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.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating45 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+10 approach)
Design loadHS 20
Structure length1,024 ft (312.2 m)
Longest span168 ft (51.2 m)
Deck width45 ft (13.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,636 (2023)
Projected traffic7,233 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Scott ST over RR built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2009.

What condition is Scott ST over RR 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 2023.

How much traffic does Scott ST over RR carry?

About 6,636 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Scott ST over RR?

The structure is 1,024 ft (312.2 m) long with a longest span of 168 ft (51.2 m) and a deck 45 ft wide.

Who owns Scott ST over RR?

It is owned by the City or Municipal Highway Agency.