US Bridges

Frenchman RD over Frenchman Rsv Spwy 124

FairPosted for load

Phillips County, Montana · 21M N Saco · Structure no. L36017015+03001

Built
1951
74 years old, rebuilt 1985
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
5 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Frenchman RD over Frenchman Rsv Spwy 124 is a steel stringer/multi-beam or girder carrying Frenchman RD over Frenchman Rsv Spwy 124 in Phillips County, Montana. It was built in 1951 and reconstructed in 1985, so it is 74 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 127 ft (38.7 m) long and 16 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

CarriesFrenchman RD
CrossesFrenchman Rsv Spwy 124
Location21M N Saco
RouteCounty Highway 36324
StateMontana
Coordinates48.69458, -107.23883
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating26.1 US tons
Inventory rating20 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans5
Design loadUnknown
Structure length127 ft (38.7 m)
Longest span25 ft (7.6 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Frenchman RD over Frenchman Rsv Spwy 124 built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1985.

What condition is Frenchman RD over Frenchman Rsv Spwy 124 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 October 2024.

How much traffic does Frenchman RD over Frenchman Rsv Spwy 124 carry?

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

How long is Frenchman RD over Frenchman Rsv Spwy 124?

The structure is 127 ft (38.7 m) long with a longest span of 25 ft (7.6 m) and a deck 16 ft wide.

Who owns Frenchman RD over Frenchman Rsv Spwy 124?

It is owned by the County Highway Agency.