US Bridges

Three Corners RD over Smoke Creek 024

Good

Roosevelt County, Montana · 30M N Poplar · Structure no. L43254000+04001

Built
2016
9 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Three Corners RD over Smoke Creek 024 is a steel stringer/multi-beam or girder carrying Three Corners RD over Smoke Creek 024 in Roosevelt County, Montana. It was built in 2016, so it is 9 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 70 ft (21.3 m) long and 24 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesThree Corners RD
CrossesSmoke Creek 024
Location30M N Poplar
RouteCounty Highway 43219
StateMontana
Coordinates48.56319, -105.07214
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating47 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 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 closed28 mi (45 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$103,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Three Corners RD over Smoke Creek 024 built?

It was built in 2016, making it 9 years old in 2025.

What condition is Three Corners RD over Smoke Creek 024 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 August 2024.

How much traffic does Three Corners RD over Smoke Creek 024 carry?

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

How long is Three Corners RD over Smoke Creek 024?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.

Who owns Three Corners RD over Smoke Creek 024?

It is owned by the County Highway Agency.