US Bridges

Cottonwood CR RD over Cottonwood Creek 025

Fair

Meagher County, Montana · 9M S Martinsdale · Structure no. L30096006+05001

Built
1970
55 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Cottonwood CR RD over Cottonwood Creek 025 is a wood or timber stringer/multi-beam or girder carrying Cottonwood CR RD over Cottonwood Creek 025 in Meagher County, Montana. It was built in 1970, so it is 55 years old, older 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 39 ft (11.9 m) long and 17 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCottonwood CR RD
CrossesCottonwood Creek 025
Location9M S Martinsdale
RouteCounty Highway 30131
StateMontana
Coordinates46.33782, -110.40501
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating44 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span19 ft (5.8 m)
Deck width17 ft (5.3 m)
Roadway width17 ft (5.1 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 closed123.7 mi (199 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$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Cottonwood CR RD over Cottonwood Creek 025 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Cottonwood CR RD over Cottonwood Creek 025 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 June 2023.

How much traffic does Cottonwood CR RD over Cottonwood Creek 025 carry?

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

How long is Cottonwood CR RD over Cottonwood Creek 025?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.8 m) and a deck 17 ft wide.

Who owns Cottonwood CR RD over Cottonwood Creek 025?

It is owned by the County Highway Agency.