US Bridges

Bartlett Road over Big Lost River

Fair

Custer County, Idaho · 5.5 N. 19.8 W. Mackay · Structure no. 000000000031686

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
70 ft
1 main span
Daily traffic
110
2023 count
Owner
Local
Other Local Agency

About this bridge

Bartlett Road over Big Lost River is a concrete box beam or girders - multiple carrying Bartlett Road over Big Lost River in Custer County, Idaho. It was built in 1996, so it is 29 years old, younger than the Idaho average of 45.3 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 110 vehicles a day, projected to reach 165 by 2042. The structure is 70 ft (21.3 m) long and 36 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesBartlett Road
CrossesBig Lost River
Location5.5 N. 19.8 W. Mackay
RouteCounty Highway 0
CountyCuster County
StateIdaho
Coordinates43.99711, -114.02228
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 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 alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating57 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic165 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bartlett Road over Big Lost River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Bartlett Road over Big Lost 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 July 2023.

How much traffic does Bartlett Road over Big Lost River carry?

About 110 vehicles per day (2023 count).

How long is Bartlett Road over Big Lost River?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 36 ft wide.

Who owns Bartlett Road over Big Lost River?

It is owned by the Other Local Agency.