US Bridges

Old HWY 10 over Drainage 015

Fair

Treasure County, Montana · 6M E Hysham · Structure no. L52086004+08001

Built
1933
92 years old, rebuilt 1954
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
2 main spans
Daily traffic
219
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 10 over Drainage 015 is a wood or timber stringer/multi-beam or girder carrying Old HWY 10 over Drainage 015 in Treasure County, Montana. It was built in 1933 and reconstructed in 1954, so it is 92 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 219 vehicles a day, roughly 16% of them trucks, projected to reach 230 by 2043. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesOld HWY 10
CrossesDrainage 015
Location6M E Hysham
RouteState Highway 81018
CountyTreasure County
StateMontana
Coordinates46.29266, -107.12623
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic219 (2023)
Projected traffic230 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Drainage 015 built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1954.

What condition is Old HWY 10 over Drainage 015 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 2023.

How much traffic does Old HWY 10 over Drainage 015 carry?

About 219 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Old HWY 10 over Drainage 015?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Old HWY 10 over Drainage 015?

It is owned by the State Highway Agency.