US Bridges

Rock Creek Boat Ra over Rock Creek

Good

Phillips County, Montana · 10.9 Miles East of US HWY · Structure no. 000061520-01681

Built
2023
2 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
200
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Rock Creek Boat Ra over Rock Creek is a steel stringer/multi-beam or girder carrying Rock Creek Boat Ra over Rock Creek in Phillips County, Montana. It was built in 2023, so it is 2 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 225 by 2044. The structure is 26 ft (7.9 m) long and 18 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesRock Creek Boat Ra
CrossesRock Creek
Location10.9 Miles East of US HWY
RouteFederal Lands Road 201
CountyPhillips County
StateMontana
Coordinates47.61267, -108.47467
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic200 (2024)
Projected traffic225 by 2044
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
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 Rock Creek Boat Ra over Rock Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Rock Creek Boat Ra over Rock 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 August 2024.

How much traffic does Rock Creek Boat Ra over Rock Creek carry?

About 200 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Rock Creek Boat Ra over Rock Creek?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 18 ft wide.

Who owns Rock Creek Boat Ra over Rock Creek?

It is owned by the Bureau of Fish and Wildlife.