US Bridges

Terrace Lake RD over Pablo Feeder Canal 022

FairPosted for load

Lake County, Montana · 2M E Ronan · Structure no. L24308002+03001

Built
2009
16 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
57 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Terrace Lake RD over Pablo Feeder Canal 022 is a wood or timber stringer/multi-beam or girder carrying Terrace Lake RD over Pablo Feeder Canal 022 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 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 57 ft (17.3 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesTerrace Lake RD
CrossesPablo Feeder Canal 022
Location2M E Ronan
RouteCounty Highway 24404
StateMontana
Coordinates47.5298, -114.03339
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33 US tons
Inventory rating24 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length57 ft (17.3 m)
Longest span30 ft (9.1 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.6 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 closed123.7 mi (199 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$161,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Terrace Lake RD over Pablo Feeder Canal 022 built?

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

What condition is Terrace Lake RD over Pablo Feeder Canal 022 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 April 2023.

How much traffic does Terrace Lake RD over Pablo Feeder Canal 022 carry?

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

How long is Terrace Lake RD over Pablo Feeder Canal 022?

The structure is 57 ft (17.3 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns Terrace Lake RD over Pablo Feeder Canal 022?

It is owned by the County Highway Agency.