US Bridges

Theresa Adams LN over Jocko River 057

Fair

Lake County, Montana · 2M E Arlee · Structure no. L24366000+06001

Built
1978
47 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Theresa Adams LN over Jocko River 057 is a prestressed concrete tee beam carrying Theresa Adams LN over Jocko River 057 in Lake County, Montana. It was built in 1978, so it is 47 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 45 ft (13.7 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesTheresa Adams LN
CrossesJocko River 057
Location2M E Arlee
RouteCounty Highway 24483
StateMontana
Coordinates47.15811, -114.02519
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating39 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
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 Theresa Adams LN over Jocko River 057 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Theresa Adams LN over Jocko River 057 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 March 2024.

How much traffic does Theresa Adams LN over Jocko River 057 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Theresa Adams LN over Jocko River 057?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 26 ft wide.

Who owns Theresa Adams LN over Jocko River 057?

It is owned by the County Highway Agency.