US Bridges

US 87 over RR

Good

Judith Basin County, Montana · 2M SE Moccasin · Structure no. P00057056+09601

Built
2012
13 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
3 main spans
Daily traffic
2,650
2023 count
Owner
State
State Highway Agency

About this bridge

US 87 over RR is a steel stringer/multi-beam or girder carrying US 87 over RR in Judith Basin County, Montana. It was built in 2012, so it is 13 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,650 vehicles a day, roughly 18% of them trucks, projected to reach 2,783 by 2043. The structure is 161 ft (49 m) long and 44 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 87
CrossesRR
Location2M SE Moccasin
RouteU.S. Route 87
StateMontana
Coordinates47.02824, -109.88037
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length161 ft (49 m)
Longest span68 ft (20.7 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2023)
Projected traffic2,783 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 US 87 over RR built?

It was built in 2012, making it 13 years old in 2025.

What condition is US 87 over RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does US 87 over RR carry?

About 2,650 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is US 87 over RR?

The structure is 161 ft (49 m) long with a longest span of 68 ft (20.7 m) and a deck 44 ft wide.

Who owns US 87 over RR?

It is owned by the State Highway Agency.