US Bridges

IRR - S 13 over Drainage

Fair

McCone County, Montana · 10M N Vida · Structure no. P00025039+07001

Built
1995
30 years old
Condition
Fair
inspected March 2023
Type
Culvert
Steel
Length
38 ft
3 main spans
Daily traffic
985
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - S 13 over Drainage is a steel culvert carrying IRR - S 13 over Drainage in McCone County, Montana. It was built in 1995, so it is 30 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 985 vehicles a day, roughly 16% of them trucks, projected to reach 1,034 by 2043. The structure is 38 ft (11.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIRR - S 13
CrossesDrainage
Location10M N Vida
RouteState Highway 13
CountyMcCone County
StateMontana
Coordinates47.97292, -105.51722
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating103.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHL 93
Structure length38 ft (11.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic985 (2023)
Projected traffic1,034 by 2043
Trucks16%
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 IRR - S 13 over Drainage built?

It was built in 1995, making it 30 years old in 2025.

What condition is IRR - S 13 over Drainage 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 March 2023.

How much traffic does IRR - S 13 over Drainage carry?

About 985 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is IRR - S 13 over Drainage?

The structure is 38 ft (11.7 m) long with a longest span of 10 ft (3 m).

Who owns IRR - S 13 over Drainage?

It is owned by the State Highway Agency.