US Bridges

S 200 over Timber Creek

FairPosted for load

McCone County, Montana · 19M W Brockway · Structure no. P00057248+08311

Built
1939
86 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
127 ft
5 main spans
Daily traffic
680
2023 count
Owner
State
State Highway Agency

About this bridge

S 200 over Timber Creek is a wood or timber stringer/multi-beam or girder carrying S 200 over Timber Creek in McCone County, Montana. It was built in 1939, so it is 86 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. Its operating status is: posted for load restriction.

It carries about 680 vehicles a day, roughly 12% of them trucks, projected to reach 731 by 2043. The structure is 127 ft (38.6 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 200
CrossesTimber Creek
Location19M W Brockway
RouteState Highway 200
CountyMcCone County
StateMontana
Coordinates47.32563, -106.16642
Functional classRural Principal Arterial - Other

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 15
Structure length127 ft (38.6 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic680 (2023)
Projected traffic731 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

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 200 over Timber Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is S 200 over Timber 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 October 2024.

How much traffic does S 200 over Timber Creek carry?

About 680 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is S 200 over Timber Creek?

The structure is 127 ft (38.6 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns S 200 over Timber Creek?

It is owned by the State Highway Agency.