US Bridges

Musselshell RD over Musselshell River 015

FairPosted for load

Musselshell County, Montana · 6M W Musselshell · Structure no. L33001027+08001

Built
1916
109 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
143 ft
1 main span
Daily traffic
34
2023 count
Owner
County
County Highway Agency

About this bridge

Musselshell RD over Musselshell River 015 is a steel truss - thru carrying Musselshell RD over Musselshell River 015 in Musselshell County, Montana. It was built in 1916, so it is 109 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 34 vehicles a day, roughly 3% of them trucks, projected to reach 36 by 2043. The structure is 143 ft (43.6 m) long and 16 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesMusselshell RD
CrossesMusselshell River 015
Location6M W Musselshell
RouteCounty Highway 33101
CountyMusselshell County
StateMontana
Coordinates46.50861, -108.21596
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16.1 US tons
Inventory rating9.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length143 ft (43.6 m)
Longest span140 ft (42.7 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck14 ft (4.2 m)

Traffic and service

Average daily traffic34 (2023)
Projected traffic36 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Musselshell RD over Musselshell River 015 built?

It was built in 1916, making it 109 years old in 2025.

What condition is Musselshell RD over Musselshell River 015 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 June 2024.

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

About 34 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Musselshell RD over Musselshell River 015?

The structure is 143 ft (43.6 m) long with a longest span of 140 ft (42.7 m) and a deck 16 ft wide.

Who owns Musselshell RD over Musselshell River 015?

It is owned by the County Highway Agency.