US Bridges

Lexington Ave over Sep Lexington ST 016

Fair

Silver Bow County, Montana · Butte-Lexington Ave · Structure no. M47018000+00011

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
224 ft
4 main spans
Daily traffic
3,768
2023 count
Owner
State
State Highway Agency

About this bridge

Lexington Ave over Sep Lexington ST 016 is a prestressed concrete stringer/multi-beam or girder carrying Lexington Ave over Sep Lexington ST 016 in Silver Bow County, Montana. It was built in 1960, so it is 65 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 3,768 vehicles a day, roughly 1% of them trucks, projected to reach 3,956 by 2043. The structure is 224 ft (68.2 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLexington Ave
CrossesSep Lexington ST 016
LocationButte-Lexington Ave
RouteCity Street 47018
CountySilver Bow County
StateMontana
Coordinates45.99151, -112.52911
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 inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length224 ft (68.2 m)
Longest span60 ft (18.3 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,768 (2023)
Projected traffic3,956 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 Lexington Ave over Sep Lexington ST 016 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Lexington Ave over Sep Lexington ST 016 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 August 2023.

How much traffic does Lexington Ave over Sep Lexington ST 016 carry?

About 3,768 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Lexington Ave over Sep Lexington ST 016?

The structure is 224 ft (68.2 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns Lexington Ave over Sep Lexington ST 016?

It is owned by the State Highway Agency.