US Bridges

Wilder Trail over Sacagawea Riv 113

Fair

Fergus County, Montana · 11M NE Roy · Structure no. L14110001+01001

Built
2015
10 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Wilder Trail over Sacagawea Riv 113 is a steel stringer/multi-beam or girder carrying Wilder Trail over Sacagawea Riv 113 in Fergus County, Montana. It was built in 2015, so it is 10 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 51 ft (15.6 m) long and 20 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesWilder Trail
CrossesSacagawea Riv 113
Location11M NE Roy
RouteCounty Highway 14110
CountyFergus County
StateMontana
Coordinates47.43201, -108.72938
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length51 ft (15.6 m)
Longest span50 ft (15.3 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 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 closed24.9 mi (40 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$57,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilder Trail over Sacagawea Riv 113 built?

It was built in 2015, making it 10 years old in 2025.

What condition is Wilder Trail over Sacagawea Riv 113 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 July 2023.

How much traffic does Wilder Trail over Sacagawea Riv 113 carry?

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

How long is Wilder Trail over Sacagawea Riv 113?

The structure is 51 ft (15.6 m) long with a longest span of 50 ft (15.3 m) and a deck 20 ft wide.

Who owns Wilder Trail over Sacagawea Riv 113?

It is owned by the County Highway Agency.