US Bridges

S 285 over Crow Creek

FairPosted for load

Broadwater County, Montana · 3M SE Radersburg · Structure no. S00285006+04001

Built
1948
77 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
26 ft
1 main span
Daily traffic
206
2023 count
Owner
State
State Highway Agency

About this bridge

S 285 over Crow Creek is a wood or timber stringer/multi-beam or girder carrying S 285 over Crow Creek in Broadwater County, Montana. It was built in 1948, so it is 77 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 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 206 vehicles a day, roughly 10% of them trucks, projected to reach 216 by 2043. The structure is 26 ft (7.8 m) long and 26 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesS 285
CrossesCrow Creek
Location3M SE Radersburg
RouteState Highway 285
CountyBroadwater County
StateMontana
Coordinates46.1734, -111.57979
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length26 ft (7.8 m)
Longest span25 ft (7.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic206 (2023)
Projected traffic216 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 S 285 over Crow Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is S 285 over Crow Creek 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 S 285 over Crow Creek carry?

About 206 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S 285 over Crow Creek?

The structure is 26 ft (7.8 m) long with a longest span of 25 ft (7.5 m) and a deck 26 ft wide.

Who owns S 285 over Crow Creek?

It is owned by the State Highway Agency.