US Bridges

Old HWY 10 over Irrigation Ditch 024

Fair

Treasure County, Montana · 10M E Hysham · Structure no. L52086009+09001

Built
1933
92 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
58 ft
3 main spans
Daily traffic
273
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 10 over Irrigation Ditch 024 is a wood or timber stringer/multi-beam or girder carrying Old HWY 10 over Irrigation Ditch 024 in Treasure County, Montana. It was built in 1933, 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 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 273 vehicles a day, roughly 13% of them trucks, projected to reach 287 by 2043. The structure is 58 ft (17.8 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesOld HWY 10
CrossesIrrigation Ditch 024
Location10M E Hysham
RouteState Highway 81018
CountyTreasure County
StateMontana
Coordinates46.29028, -107.02082
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating37 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length58 ft (17.8 m)
Longest span19 ft (5.9 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 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 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 Irrigation Ditch 024 built?

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

What condition is Old HWY 10 over Irrigation Ditch 024 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 Irrigation Ditch 024 carry?

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

How long is Old HWY 10 over Irrigation Ditch 024?

The structure is 58 ft (17.8 m) long with a longest span of 19 ft (5.9 m) and a deck 27 ft wide.

Who owns Old HWY 10 over Irrigation Ditch 024?

It is owned by the State Highway Agency.