US Bridges

Red Lodge CR RD over Red Lodge Creek 012

Fair

Carbon County, Montana · 11M SW Boyd · Structure no. L05002016+08001

Built
2005
20 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Red Lodge CR RD over Red Lodge Creek 012 is a steel stringer/multi-beam or girder carrying Red Lodge CR RD over Red Lodge Creek 012 in Carbon County, Montana. It was built in 2005, so it is 20 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 50 ft (15.2 m) long and 20 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesRed Lodge CR RD
CrossesRed Lodge Creek 012
Location11M SW Boyd
RouteCounty Highway 5002
StateMontana
Coordinates45.42085, -109.29082
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length50 ft (15.2 m)
Longest span50 ft (15.1 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Red Lodge CR RD over Red Lodge Creek 012 built?

It was built in 2005, making it 20 years old in 2025.

What condition is Red Lodge CR RD over Red Lodge Creek 012 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 August 2023.

How much traffic does Red Lodge CR RD over Red Lodge Creek 012 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Red Lodge CR RD over Red Lodge Creek 012?

The structure is 50 ft (15.2 m) long with a longest span of 50 ft (15.1 m) and a deck 20 ft wide.

Who owns Red Lodge CR RD over Red Lodge Creek 012?

It is owned by the County Highway Agency.