US Bridges

N Bench RD over West Fork Poplar R 026

FairPosted for load

Valley County, Montana · 9M NE Opheim · Structure no. L53336002+00001

Built
1975
50 years old, rebuilt 1998
Condition
Fair
inspected November 2024
Type
Girder and Floorbeam System
Steel
Length
158 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

N Bench RD over West Fork Poplar R 026 is a steel girder and floorbeam system carrying N Bench RD over West Fork Poplar R 026 in Valley County, Montana. It was built in 1975 and reconstructed in 1998, so it is 50 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 158 ft (48.2 m) long and 17 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesN Bench RD
CrossesWest Fork Poplar R 026
Location9M NE Opheim
RouteCounty Highway 53005
StateMontana
Coordinates48.93908, -106.2532
Functional classRural Minor Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24 US tons
Inventory rating15 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length158 ft (48.2 m)
Longest span95 ft (29.1 m)
Deck width17 ft (5.3 m)
Roadway width17 ft (5.2 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
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$245,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Bench RD over West Fork Poplar R 026 built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1998.

What condition is N Bench RD over West Fork Poplar R 026 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 2024.

How much traffic does N Bench RD over West Fork Poplar R 026 carry?

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

How long is N Bench RD over West Fork Poplar R 026?

The structure is 158 ft (48.2 m) long with a longest span of 95 ft (29.1 m) and a deck 17 ft wide.

Who owns N Bench RD over West Fork Poplar R 026?

It is owned by the County Highway Agency.