US Bridges

Truly Cutoff RD over Smith River 033

FairPosted for load

Cascade County, Montana · 7M SE Ulm · Structure no. L07410000+01001

Built
1908
117 years old
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
172 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Truly Cutoff RD over Smith River 033 is a steel truss - thru carrying Truly Cutoff RD over Smith River 033 in Cascade County, Montana. It was built in 1908, so it is 117 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 172 ft (52.4 m) long and 16 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesTruly Cutoff RD
CrossesSmith River 033
Location7M SE Ulm
RouteCounty Highway 7410
CountyCascade County
StateMontana
Coordinates47.35689, -111.44068
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating9.6 US tons
Inventory rating7.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length172 ft (52.4 m)
Longest span112 ft (34.1 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$380,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Truly Cutoff RD over Smith River 033 built?

It was built in 1908, making it 117 years old in 2025.

What condition is Truly Cutoff RD over Smith River 033 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 July 2024.

How much traffic does Truly Cutoff RD over Smith River 033 carry?

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

How long is Truly Cutoff RD over Smith River 033?

The structure is 172 ft (52.4 m) long with a longest span of 112 ft (34.1 m) and a deck 16 ft wide.

Who owns Truly Cutoff RD over Smith River 033?

It is owned by the County Highway Agency.