US Bridges

S Billings Blvd over Sep Billings Blvd-I 90

Fair

Yellowstone County, Montana · Billings-S Billings Blvd · Structure no. U01013000+07771

Built
1963
62 years old, rebuilt 1992
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
215 ft
4 main spans
Daily traffic
15,780
2023 count
Owner
State
State Highway Agency

About this bridge

S Billings Blvd over Sep Billings Blvd-I 90 is a prestressed concrete stringer/multi-beam or girder carrying S Billings Blvd over Sep Billings Blvd-I 90 in Yellowstone County, Montana. It was built in 1963 and reconstructed in 1992, so it is 62 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 15,780 vehicles a day, roughly 2% of them trucks, projected to reach 16,885 by 2043. The structure is 215 ft (65.5 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesS Billings Blvd
CrossesSep Billings Blvd-I 90
LocationBillings-S Billings Blvd
RouteCity Street 1013
CountyYellowstone County
StateMontana
Coordinates45.75224, -108.53565
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating54 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length215 ft (65.5 m)
Longest span61 ft (18.7 m)
Deck width68 ft (20.8 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,780 (2023)
Projected traffic16,885 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 S Billings Blvd over Sep Billings Blvd-I 90 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1992.

What condition is S Billings Blvd over Sep Billings Blvd-I 90 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 S Billings Blvd over Sep Billings Blvd-I 90 carry?

About 15,780 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is S Billings Blvd over Sep Billings Blvd-I 90?

The structure is 215 ft (65.5 m) long with a longest span of 61 ft (18.7 m) and a deck 68 ft wide.

Who owns S Billings Blvd over Sep Billings Blvd-I 90?

It is owned by the State Highway Agency.