US Bridges

Old HWY 10 over Irrigation Ditch 022

Fair

Treasure County, Montana · 9M E Hysham · Structure no. L52086008+03001

Built
2011
14 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
111 ft
1 main span
Daily traffic
219
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 10 over Irrigation Ditch 022 is a prestressed concrete stringer/multi-beam or girder carrying Old HWY 10 over Irrigation Ditch 022 in Treasure County, Montana. It was built in 2011, so it is 14 years old, younger 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 219 vehicles a day, roughly 16% of them trucks, projected to reach 230 by 2043. The structure is 111 ft (33.8 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesOld HWY 10
CrossesIrrigation Ditch 022
Location9M E Hysham
RouteState Highway 81018
CountyTreasure County
StateMontana
Coordinates46.29078, -107.05395
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
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 rating40 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length111 ft (33.8 m)
Longest span111 ft (33.8 m)
Deck width29 ft (8.9 m)
Roadway width27 ft (8.1 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 Irrigation Ditch 022 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Old HWY 10 over Irrigation Ditch 022 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 February 2025.

How much traffic does Old HWY 10 over Irrigation Ditch 022 carry?

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

How long is Old HWY 10 over Irrigation Ditch 022?

The structure is 111 ft (33.8 m) long with a longest span of 111 ft (33.8 m) and a deck 29 ft wide.

Who owns Old HWY 10 over Irrigation Ditch 022?

It is owned by the State Highway Agency.