US Bridges

US 93 over Agricultural Crossing

Good

Lake County, Montana · 2M N Ronan · Structure no. P00005049+02721

Built
2007
18 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
10,897
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Agricultural Crossing is a concrete culvert carrying US 93 over Agricultural Crossing in Lake County, Montana. It was built in 2007, so it is 18 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,897 vehicles a day, roughly 3% of them trucks, projected to reach 11,442 by 2043. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 93
CrossesAgricultural Crossing
Location2M N Ronan
RouteU.S. Route 93
StateMontana
Coordinates47.55694, -114.11306
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,897 (2023)
Projected traffic11,442 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 93 over Agricultural Crossing built?

It was built in 2007, making it 18 years old in 2025.

What condition is US 93 over Agricultural Crossing 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 January 2025.

How much traffic does US 93 over Agricultural Crossing carry?

About 10,897 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US 93 over Agricultural Crossing?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m).

Who owns US 93 over Agricultural Crossing?

It is owned by the State Highway Agency.