US Bridges

River RD over Irrigation Ditch 020

FairPosted for load

Treasure County, Montana · 2M W Hysham · Structure no. L52006005+00001

Built
1978
47 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
17
2023 count
Owner
County
County Highway Agency

About this bridge

River RD over Irrigation Ditch 020 is a steel stringer/multi-beam or girder carrying River RD over Irrigation Ditch 020 in Treasure County, Montana. It was built in 1978, so it is 47 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 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 17 vehicles a day, roughly 3% of them trucks, projected to reach 18 by 2043. The structure is 53 ft (16.2 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesRiver RD
CrossesIrrigation Ditch 020
Location2M W Hysham
RouteCounty Highway 52014
CountyTreasure County
StateMontana
Coordinates46.2936, -107.2653
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating5 US tons
Inventory rating5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span46 ft (14 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17 (2023)
Projected traffic18 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$276,000
NavigationNo navigation control on waterway

Frequently asked questions

When was River RD over Irrigation Ditch 020 built?

It was built in 1978, making it 47 years old in 2025.

What condition is River RD over Irrigation Ditch 020 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 2024.

How much traffic does River RD over Irrigation Ditch 020 carry?

About 17 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is River RD over Irrigation Ditch 020?

The structure is 53 ft (16.2 m) long with a longest span of 46 ft (14 m) and a deck 31 ft wide.

Who owns River RD over Irrigation Ditch 020?

It is owned by the County Highway Agency.