US Bridges

Wilson Creek RD over Irrigation Canal

Good

Gallatin County, Montana · 4M S Gallatin Gateway · Structure no. 000000202008008

Built
2019
6 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Wilson Creek RD over Irrigation Canal is a concrete slab carrying Wilson Creek RD over Irrigation Canal in Gallatin County, Montana. It was built in 2019, so it is 6 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesWilson Creek RD
CrossesIrrigation Canal
Location4M S Gallatin Gateway
RouteCounty Highway 16813
StateMontana
Coordinates45.54498, -111.20722
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: 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 rating36 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Wilson Creek RD over Irrigation Canal built?

It was built in 2019, making it 6 years old in 2025.

What condition is Wilson Creek RD over Irrigation Canal 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 June 2024.

How much traffic does Wilson Creek RD over Irrigation Canal carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Wilson Creek RD over Irrigation Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns Wilson Creek RD over Irrigation Canal?

It is owned by the County Highway Agency.