US Bridges

Old HWY 10 over Wyant Coulee 044

Fair

Rosebud County, Montana · 7M W Forsyth · Structure no. L44311007+07001

Built
1932
93 years old, rebuilt 1941
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
3 main spans
Daily traffic
273
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 10 over Wyant Coulee 044 is a steel stringer/multi-beam or girder carrying Old HWY 10 over Wyant Coulee 044 in Rosebud County, Montana. It was built in 1932 and reconstructed in 1941, so it is 93 years old, older 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 5 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 273 vehicles a day, roughly 13% of them trucks, projected to reach 287 by 2043. The structure is 66 ft (20 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesOld HWY 10
CrossesWyant Coulee 044
Location7M W Forsyth
RouteState Highway 81018
CountyRosebud County
StateMontana
Coordinates46.25969, -106.84577
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length66 ft (20 m)
Longest span25 ft (7.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic273 (2023)
Projected traffic287 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Old HWY 10 over Wyant Coulee 044 built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1941.

What condition is Old HWY 10 over Wyant Coulee 044 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 September 2024.

How much traffic does Old HWY 10 over Wyant Coulee 044 carry?

About 273 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Old HWY 10 over Wyant Coulee 044?

The structure is 66 ft (20 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.

Who owns Old HWY 10 over Wyant Coulee 044?

It is owned by the State Highway Agency.