US Bridges

Kountz RD over Jefferson River 017

Fair

Madison County, Montana · 3M E Whitehall · Structure no. L29091001+06001

Built
1973
52 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
291 ft
3 main spans
Daily traffic
269
2023 count
Owner
County
County Highway Agency

About this bridge

Kountz RD over Jefferson River 017 is a prestressed concrete stringer/multi-beam or girder carrying Kountz RD over Jefferson River 017 in Madison County, Montana. It was built in 1973, so it is 52 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 269 vehicles a day, roughly 3% of them trucks, projected to reach 288 by 2043. The structure is 291 ft (88.6 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesKountz RD
CrossesJefferson River 017
Location3M E Whitehall
RouteCounty Highway 29091
CountyMadison County
StateMontana
Coordinates45.84411, -112.05842
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length291 ft (88.6 m)
Longest span95 ft (29 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic269 (2023)
Projected traffic288 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Kountz RD over Jefferson River 017 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Kountz RD over Jefferson River 017 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 2023.

How much traffic does Kountz RD over Jefferson River 017 carry?

About 269 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Kountz RD over Jefferson River 017?

The structure is 291 ft (88.6 m) long with a longest span of 95 ft (29 m) and a deck 31 ft wide.

Who owns Kountz RD over Jefferson River 017?

It is owned by the County Highway Agency.