US Bridges

S 200 over RR

Fair

Sanders County, Montana · 3M NW Noxon · Structure no. P00006012+07751

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
346 ft
3 main spans
Daily traffic
1,537
2023 count
Owner
State
State Highway Agency

About this bridge

S 200 over RR is a steel continuous stringer/multi-beam or girder carrying S 200 over RR in Sanders County, Montana. It was built in 1957, so it is 68 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 1,537 vehicles a day, roughly 5% of them trucks, projected to reach 1,614 by 2043. The structure is 346 ft (105.4 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS 200
CrossesRR
Location3M NW Noxon
RouteState Highway 200
CountySanders County
StateMontana
Coordinates48.01478, -115.81367
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length346 ft (105.4 m)
Longest span129 ft (39.3 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,537 (2023)
Projected traffic1,614 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$998,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was S 200 over RR built?

It was built in 1957, making it 68 years old in 2025.

What condition is S 200 over RR 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 July 2023.

How much traffic does S 200 over RR carry?

About 1,537 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S 200 over RR?

The structure is 346 ft (105.4 m) long with a longest span of 129 ft (39.3 m) and a deck 32 ft wide.

Who owns S 200 over RR?

It is owned by the State Highway Agency.