US Bridges

S 203-EASTSIDE HWY over Bitterroot River

Fair

Ravalli County, Montana · 1M E Florence · Structure no. S00203010+06401

Built
2014
11 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
384 ft
3 main spans
Daily traffic
7,710
2023 count
Owner
State
State Highway Agency

About this bridge

S 203-EASTSIDE HWY over Bitterroot River is a prestressed concrete stringer/multi-beam or girder carrying S 203-EASTSIDE HWY over Bitterroot River in Ravalli County, Montana. It was built in 2014, so it is 11 years old, younger 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.

It carries about 7,710 vehicles a day, roughly 1% of them trucks, projected to reach 8,134 by 2043. The structure is 384 ft (116.9 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS 203-EASTSIDE HWY
CrossesBitterroot River
Location1M E Florence
RouteState Highway 203
CountyRavalli County
StateMontana
Coordinates46.63273, -114.0512
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length384 ft (116.9 m)
Longest span137 ft (41.7 m)
Deck width53 ft (16.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,710 (2023)
Projected traffic8,134 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$894,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S 203-EASTSIDE HWY over Bitterroot River built?

It was built in 2014, making it 11 years old in 2025.

What condition is S 203-EASTSIDE HWY over Bitterroot River 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 April 2024.

How much traffic does S 203-EASTSIDE HWY over Bitterroot River carry?

About 7,710 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is S 203-EASTSIDE HWY over Bitterroot River?

The structure is 384 ft (116.9 m) long with a longest span of 137 ft (41.7 m) and a deck 53 ft wide.

Who owns S 203-EASTSIDE HWY over Bitterroot River?

It is owned by the State Highway Agency.