US Bridges

Boyd Cooney Dam RD over Red Lodge Creek 013

FairPosted for load

Carbon County, Montana · Cooney Reservoir Dam · Structure no. L05001008+00001

Built
1991
34 years old, rebuilt 2011
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
593
2023 count
Owner
County
County Highway Agency

About this bridge

Boyd Cooney Dam RD over Red Lodge Creek 013 is a steel stringer/multi-beam or girder carrying Boyd Cooney Dam RD over Red Lodge Creek 013 in Carbon County, Montana. It was built in 1991 and reconstructed in 2011, so it is 34 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. Its operating status is: posted for load restriction.

It carries about 593 vehicles a day, roughly 3% of them trucks, projected to reach 623 by 2043. The structure is 39 ft (11.9 m) long and 25 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesBoyd Cooney Dam RD
CrossesRed Lodge Creek 013
LocationCooney Reservoir Dam
RouteCounty Highway 5001
StateMontana
Coordinates45.44988, -109.19719
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating21.1 US tons
Inventory rating16 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span36 ft (11 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic593 (2023)
Projected traffic623 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$182,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Boyd Cooney Dam RD over Red Lodge Creek 013 built?

It was built in 1991, making it 34 years old in 2025. It was reconstructed in 2011.

What condition is Boyd Cooney Dam RD over Red Lodge Creek 013 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 Boyd Cooney Dam RD over Red Lodge Creek 013 carry?

About 593 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Boyd Cooney Dam RD over Red Lodge Creek 013?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 25 ft wide.

Who owns Boyd Cooney Dam RD over Red Lodge Creek 013?

It is owned by the County Highway Agency.