US Bridges

Kingston Mine RD over C Canal 025

FairPosted for load

Pondera County, Montana · 1M W Valier · Structure no. L37057000+02001

Built
1960
65 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Kingston Mine RD over C Canal 025 is a wood or timber stringer/multi-beam or girder carrying Kingston Mine RD over C Canal 025 in Pondera County, Montana. It was built in 1960, so it is 65 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 25 ft (7.6 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesKingston Mine RD
CrossesC Canal 025
Location1M W Valier
RouteCounty Highway 37057
StateMontana
Coordinates48.31778, -112.27183
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating18 US tons
Inventory rating11 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.6 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 closed6.2 mi (10 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 Kingston Mine RD over C Canal 025 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Kingston Mine RD over C Canal 025 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 Kingston Mine RD over C Canal 025 carry?

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

How long is Kingston Mine RD over C Canal 025?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 22 ft wide.

Who owns Kingston Mine RD over C Canal 025?

It is owned by the County Highway Agency.