US Bridges

Shields Ave over RR

Fair

Silver Bow County, Montana · Butte-Shields Ave · Structure no. U01807001+01361

Built
1958
67 years old, rebuilt 1990
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
216 ft
4 main spans
Daily traffic
6,411
2023 count
Owner
State
State Highway Agency

About this bridge

Shields Ave over RR is a prestressed concrete stringer/multi-beam or girder carrying Shields Ave over RR in Silver Bow County, Montana. It was built in 1958 and reconstructed in 1990, so it is 67 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 6,411 vehicles a day, roughly 1% of them trucks, projected to reach 7,341 by 2043. The structure is 216 ft (65.8 m) long and 42 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesShields Ave
CrossesRR
LocationButte-Shields Ave
RouteCity Street 1807
CountySilver Bow County
StateMontana
Coordinates46.00556, -112.51561
Functional classUrban Minor Arterial

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 inspectionNovember 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 alignment6: Equal to present minimum criteria
Operating rating50.9 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length216 ft (65.8 m)
Longest span60 ft (18.3 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,411 (2023)
Projected traffic7,341 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
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 Shields Ave over RR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1990.

What condition is Shields Ave 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 November 2023.

How much traffic does Shields Ave over RR carry?

About 6,411 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Shields Ave over RR?

The structure is 216 ft (65.8 m) long with a longest span of 60 ft (18.3 m) and a deck 42 ft wide.

Who owns Shields Ave over RR?

It is owned by the State Highway Agency.