US Bridges

S 200 over RR

Poor

Sanders County, Montana · 2M SE Noxon · Structure no. P00006017+00341

Built
1957
68 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,537 vehicles a day, roughly 5% of them trucks, projected to reach 1,614 by 2043. The structure is 315 ft (96 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
Location2M SE Noxon
RouteState Highway 200
CountySanders County
StateMontana
Coordinates47.97908, -115.74147
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating34 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length315 ft (96 m)
Longest span108 ft (32.9 m)
Deck width32 ft (9.7 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 proposedNone recorded
Estimated improvement cost—
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 poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. 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 315 ft (96 m) long with a longest span of 108 ft (32.9 m) and a deck 32 ft wide.

Who owns S 200 over RR?

It is owned by the State Highway Agency.