US Bridges

Old HWY 10 over Reservation Creek 043

FairPosted for load

Rosebud County, Montana · 11M W Forsyth · Structure no. L44311012+01001

Built
1936
89 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
100 ft
4 main spans
Daily traffic
273
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 10 over Reservation Creek 043 is a wood or timber stringer/multi-beam or girder carrying Old HWY 10 over Reservation Creek 043 in Rosebud County, Montana. It was built in 1936, so it is 89 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. Its operating status is: posted for load restriction.

It carries about 273 vehicles a day, roughly 13% of them trucks, projected to reach 287 by 2043. The structure is 100 ft (30.5 m) long and 28 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesOld HWY 10
CrossesReservation Creek 043
Location11M W Forsyth
RouteState Highway 81018
CountyRosebud County
StateMontana
Coordinates46.27434, -106.92977
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
Deck7 GoodSome minor problems.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 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 Reservation Creek 043 built?

It was built in 1936, making it 89 years old in 2025.

What condition is Old HWY 10 over Reservation Creek 043 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 August 2024.

How much traffic does Old HWY 10 over Reservation Creek 043 carry?

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

How long is Old HWY 10 over Reservation Creek 043?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.

Who owns Old HWY 10 over Reservation Creek 043?

It is owned by the State Highway Agency.