US Bridges

Linshire RD over Rock Creek 005

Fair

Meagher County, Montana · 35M NW White Sulphur Spr · Structure no. L30001016+03001

Built
1981
44 years old
Condition
Fair
inspected June 2023
Type
Channel Beam
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
81
2023 count
Owner
County
County Highway Agency

About this bridge

Linshire RD over Rock Creek 005 is a prestressed concrete channel beam carrying Linshire RD over Rock Creek 005 in Meagher County, Montana. It was built in 1981, so it is 44 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.

It carries about 81 vehicles a day, roughly 3% of them trucks, projected to reach 87 by 2043. The structure is 31 ft (9.4 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesLinshire RD
CrossesRock Creek 005
Location35M NW White Sulphur Spr
RouteCounty Highway 30001
CountyMeagher County
StateMontana
Coordinates46.84132, -111.40545
Functional classRural Minor 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
Deck7 GoodSome minor problems.
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic81 (2023)
Projected traffic87 by 2043
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 Linshire RD over Rock Creek 005 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Linshire RD over Rock Creek 005 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 2023.

How much traffic does Linshire RD over Rock Creek 005 carry?

About 81 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Linshire RD over Rock Creek 005?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Linshire RD over Rock Creek 005?

It is owned by the County Highway Agency.