US Bridges

Poplar River RD over Poplar River 015

Poor

Roosevelt County, Montana · 22M N Poplar · Structure no. L43202021+06001

Built
1985
40 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete
Length
105 ft
8 main spans
Daily traffic
563
2023 count
Owner
County
County Highway Agency

About this bridge

Poplar River RD over Poplar River 015 is a concrete slab carrying Poplar River RD over Poplar River 015 in Roosevelt County, Montana. It was built in 1985, so it is 40 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 563 vehicles a day, roughly 3% of them trucks, projected to reach 594 by 2043. The structure is 105 ft (31.9 m) long and 22 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesPoplar River RD
CrossesPoplar River 015
Location22M N Poplar
RouteCounty Highway 43102
StateMontana
Coordinates48.40587, -105.21016
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length105 ft (31.9 m)
Longest span13 ft (4 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic563 (2023)
Projected traffic594 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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$216,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Poplar River RD over Poplar River 015 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Poplar River RD over Poplar River 015 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Poplar River RD over Poplar River 015 carry?

About 563 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Poplar River RD over Poplar River 015?

The structure is 105 ft (31.9 m) long with a longest span of 13 ft (4 m) and a deck 22 ft wide.

Who owns Poplar River RD over Poplar River 015?

It is owned by the County Highway Agency.