US Bridges

S 13 over Drainage

Good

McCone County, Montana · 4M N Vida · Structure no. P00025034+01771

Built
1994
31 years old
Condition
Good
inspected March 2023
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
901
2023 count
Owner
State
State Highway Agency

About this bridge

S 13 over Drainage is a steel culvert carrying S 13 over Drainage in McCone County, Montana. It was built in 1994, so it is 31 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 901 vehicles a day, roughly 17% of them trucks, projected to reach 946 by 2043. The structure is 30 ft (9 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS 13
CrossesDrainage
Location4M N Vida
RouteState Highway 13
StateMontana
Coordinates47.89467, -105.49664
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length30 ft (9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic901 (2023)
Projected traffic946 by 2043
Trucks17%
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 13 over Drainage built?

It was built in 1994, making it 31 years old in 2025.

What condition is S 13 over Drainage in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does S 13 over Drainage carry?

About 901 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is S 13 over Drainage?

The structure is 30 ft (9 m) long with a longest span of 12 ft (3.7 m).

Who owns S 13 over Drainage?

It is owned by the State Highway Agency.