US Bridges

S 200 over Drainage

Fair

Garfield County, Montana · 20M W Brockway · Structure no. P00057247+03941

Built
1938
87 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
96 ft
5 main spans
Daily traffic
537
2023 count
Owner
State
State Highway Agency

About this bridge

S 200 over Drainage is a wood or timber stringer/multi-beam or girder carrying S 200 over Drainage in Garfield County, Montana. It was built in 1938, so it is 87 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 537 vehicles a day, roughly 9% of them trucks, projected to reach 564 by 2043. The structure is 96 ft (29.4 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesS 200
CrossesDrainage
Location20M W Brockway
RouteState Highway 200
CountyGarfield County
StateMontana
Coordinates47.32564, -106.19692
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 15
Structure length96 ft (29.4 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic537 (2023)
Projected traffic564 by 2043
Trucks9%
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 Drainage built?

It was built in 1938, making it 87 years old in 2025.

What condition is S 200 over Drainage 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 Drainage carry?

About 537 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is S 200 over Drainage?

The structure is 96 ft (29.4 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns S 200 over Drainage?

It is owned by the State Highway Agency.