US Bridges

IRR - S 200 over Jocko River-Rr

Fair

Lake County, Montana · Ravalli · Structure no. P00006115+08931

Built
1998
27 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
493 ft
5 main spans
Daily traffic
1,938
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - S 200 over Jocko River-Rr is a prestressed concrete stringer/multi-beam or girder carrying IRR - S 200 over Jocko River-Rr in Lake County, Montana. It was built in 1998, so it is 27 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 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 1,938 vehicles a day, roughly 5% of them trucks, projected to reach 2,035 by 2043. The structure is 493 ft (150.4 m) long and 42 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIRR - S 200
CrossesJocko River-Rr
LocationRavalli
RouteState Highway 200
CountyLake County
StateMontana
Coordinates47.27856, -114.18893
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating49.1 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length493 ft (150.4 m)
Longest span116 ft (35.3 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,938 (2023)
Projected traffic2,035 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR - S 200 over Jocko River-Rr built?

It was built in 1998, making it 27 years old in 2025.

What condition is IRR - S 200 over Jocko River-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 September 2023.

How much traffic does IRR - S 200 over Jocko River-Rr carry?

About 1,938 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR - S 200 over Jocko River-Rr?

The structure is 493 ft (150.4 m) long with a longest span of 116 ft (35.3 m) and a deck 42 ft wide.

Who owns IRR - S 200 over Jocko River-Rr?

It is owned by the State Highway Agency.