US Bridges

Potter RD over Int Potter RD I 15 004

Fair

Toole County, Montana · 6M S Oilmont · Structure no. L51020000+00001

Built
1980
45 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
233 ft
2 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Potter RD over Int Potter RD I 15 004 is a prestressed concrete stringer/multi-beam or girder carrying Potter RD over Int Potter RD I 15 004 in Toole County, Montana. It was built in 1980, so it is 45 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 233 ft (71 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesPotter RD
CrossesInt Potter RD I 15 004
Location6M S Oilmont
RouteCounty Highway 51020
CountyToole County
StateMontana
Coordinates48.65322, -111.862
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length233 ft (71 m)
Longest span116 ft (35.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Potter RD over Int Potter RD I 15 004 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Potter RD over Int Potter RD I 15 004 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 October 2023.

How much traffic does Potter RD over Int Potter RD I 15 004 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Potter RD over Int Potter RD I 15 004?

The structure is 233 ft (71 m) long with a longest span of 116 ft (35.3 m) and a deck 34 ft wide.

Who owns Potter RD over Int Potter RD I 15 004?

It is owned by the State Highway Agency.