US Bridges

US 87 over Otter Creek

Good

Judith Basin County, Montana · Raynesford · Structure no. P00057010+03431

Built
1961
64 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
2 main spans
Daily traffic
2,874
2023 count
Owner
State
State Highway Agency

About this bridge

US 87 over Otter Creek is a prestressed concrete stringer/multi-beam or girder carrying US 87 over Otter Creek in Judith Basin County, Montana. It was built in 1961, so it is 64 years old, older 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 2,874 vehicles a day, roughly 14% of them trucks, projected to reach 3,018 by 2043. The structure is 83 ft (25.3 m) long and 32 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesUS 87
CrossesOtter Creek
LocationRaynesford
RouteU.S. Route 87
StateMontana
Coordinates47.26586, -110.72549
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating61.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span41 ft (12.4 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,874 (2023)
Projected traffic3,018 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 87 over Otter Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is US 87 over Otter Creek 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 June 2024.

How much traffic does US 87 over Otter Creek carry?

About 2,874 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 87 over Otter Creek?

The structure is 83 ft (25.3 m) long with a longest span of 41 ft (12.4 m) and a deck 32 ft wide.

Who owns US 87 over Otter Creek?

It is owned by the State Highway Agency.