US Bridges

County Road 548 over Musselshell River 025

Fair

Musselshell County, Montana · Roundup · Structure no. L33548000+00001

Built
2013
12 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Prestressed Concrete
Length
116 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

County Road 548 over Musselshell River 025 is a prestressed concrete tee beam carrying County Road 548 over Musselshell River 025 in Musselshell County, Montana. It was built in 2013, so it is 12 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 116 ft (35.5 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road 548
CrossesMusselshell River 025
LocationRoundup
RouteCity Street 33548
CountyMusselshell County
StateMontana
Coordinates46.43928, -108.53669
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating41.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length116 ft (35.5 m)
Longest span112 ft (34 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.7 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 548 over Musselshell River 025 built?

It was built in 2013, making it 12 years old in 2025.

What condition is County Road 548 over Musselshell River 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 April 2023.

How much traffic does County Road 548 over Musselshell River 025 carry?

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

How long is County Road 548 over Musselshell River 025?

The structure is 116 ft (35.5 m) long with a longest span of 112 ft (34 m) and a deck 22 ft wide.

Who owns County Road 548 over Musselshell River 025?

It is owned by the County Highway Agency.