US Bridges

Fallon Tower RD over Sep I 94 003

Fair

Prairie County, Montana · 2M NE Fallon · Structure no. L40114002+01001

Built
1977
48 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
4 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Fallon Tower RD over Sep I 94 003 is a prestressed concrete stringer/multi-beam or girder carrying Fallon Tower RD over Sep I 94 003 in Prairie County, Montana. It was built in 1977, so it is 48 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 305 ft (93.1 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFallon Tower RD
CrossesSep I 94 003
Location2M NE Fallon
RouteState Highway 40114
StateMontana
Coordinates46.86531, -105.10453
Functional classRural Local

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating23 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length305 ft (93.1 m)
Longest span106 ft (32.3 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Fallon Tower RD over Sep I 94 003 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Fallon Tower RD over Sep I 94 003 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 January 2025.

How much traffic does Fallon Tower RD over Sep I 94 003 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Fallon Tower RD over Sep I 94 003?

The structure is 305 ft (93.1 m) long with a longest span of 106 ft (32.3 m) and a deck 30 ft wide.

Who owns Fallon Tower RD over Sep I 94 003?

It is owned by the State Highway Agency.