US Bridges

Light RD over Pablo 31A Canal 036

Poor

Lake County, Montana · 5M S Polson · Structure no. L24029001+08001

Built
2009
16 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
292
2023 count
Owner
County
County Highway Agency

About this bridge

Light RD over Pablo 31A Canal 036 is a steel stringer/multi-beam or girder carrying Light RD over Pablo 31A Canal 036 in Lake County, Montana. It was built in 2009, so it is 16 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 292 vehicles a day, roughly 3% of them trucks, projected to reach 312 by 2043. The structure is 80 ft (24.4 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLight RD
CrossesPablo 31A Canal 036
Location5M S Polson
RouteCounty Highway 24232
CountyLake County
StateMontana
Coordinates47.61668, -114.15036
Functional classRural Local

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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating65.6 US tons
Inventory rating39.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span72 ft (21.9 m)
Deck width25 ft (7.5 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic292 (2023)
Projected traffic312 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Light RD over Pablo 31A Canal 036 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Light RD over Pablo 31A Canal 036 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 April 2024.

How much traffic does Light RD over Pablo 31A Canal 036 carry?

About 292 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Light RD over Pablo 31A Canal 036?

The structure is 80 ft (24.4 m) long with a longest span of 72 ft (21.9 m) and a deck 25 ft wide.

Who owns Light RD over Pablo 31A Canal 036?

It is owned by the County Highway Agency.