US Bridges

S 24 over Roanwood Creek

Fair

Valley County, Montana · 5M N Opheim · Structure no. P00031055+06501

Built
1957
68 years old
Condition
Fair
inspected November 2024
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
31
2023 count
Owner
State
State Highway Agency

About this bridge

S 24 over Roanwood Creek is a steel culvert carrying S 24 over Roanwood Creek in Valley County, Montana. It was built in 1957, so it is 68 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.

It carries about 31 vehicles a day, projected to reach 33 by 2043. The structure is 29 ft (8.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 24
CrossesRoanwood Creek
Location5M N Opheim
RouteState Highway 24
CountyValley County
StateMontana
Coordinates48.92642, -106.38807
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating52 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length29 ft (8.7 m)
Longest span17 ft (5.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2023)
Projected traffic33 by 2043
Trucks0%
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

OwnerState Highway Agency
Maintained byState 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 S 24 over Roanwood Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is S 24 over Roanwood Creek 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 S 24 over Roanwood Creek carry?

About 31 vehicles per day (2023 count).

How long is S 24 over Roanwood Creek?

The structure is 29 ft (8.7 m) long with a longest span of 17 ft (5.1 m).

Who owns S 24 over Roanwood Creek?

It is owned by the State Highway Agency.