US Bridges

US 87 over Otter Creek

Good

Judith Basin County, Montana · 1M SE Raynesford · Structure no. P00057010+08831

Built
1964
61 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
2 main spans
Daily traffic
2,361
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 1964, so it is 61 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 2,361 vehicles a day, roughly 17% of them trucks, projected to reach 2,479 by 2043. The structure is 83 ft (25.3 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 87
CrossesOtter Creek
Location1M SE Raynesford
RouteU.S. Route 87
StateMontana
Coordinates47.2635, -110.71504
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85 US tons
Inventory rating65 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 width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,361 (2023)
Projected traffic2,479 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$165,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 87 over Otter Creek built?

It was built in 1964, making it 61 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 2,361 vehicles per day (2023 count), of which roughly 17% 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 31 ft wide.

Who owns US 87 over Otter Creek?

It is owned by the State Highway Agency.