US Bridges

S6869;FSH Hatchry over Big Lost River(pence Br)

Good

Custer County, Idaho · 5.4 N. 7.6 W. Mackay · Structure no. 000000000031786

Built
2018
7 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
113 ft
1 main span
Daily traffic
160
2023 count
Owner
Local
Other Local Agency

About this bridge

S6869;FSH Hatchry over Big Lost River(pence Br) is a prestressed concrete tee beam carrying S6869;FSH Hatchry over Big Lost River(pence Br) in Custer County, Idaho. It was built in 2018, so it is 7 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 160 vehicles a day, roughly 19% of them trucks, projected to reach 240 by 2039. The structure is 113 ft (34.4 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesS6869;FSH Hatchry
CrossesBig Lost River(pence Br)
Location5.4 N. 7.6 W. Mackay
RouteCounty Highway 6869
StateIdaho
Coordinates43.99694, -113.77153
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length113 ft (34.4 m)
Longest span80 ft (24.4 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic240 by 2039
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 S6869;FSH Hatchry over Big Lost River(pence Br) built?

It was built in 2018, making it 7 years old in 2025.

What condition is S6869;FSH Hatchry over Big Lost River(pence Br) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does S6869;FSH Hatchry over Big Lost River(pence Br) carry?

About 160 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is S6869;FSH Hatchry over Big Lost River(pence Br)?

The structure is 113 ft (34.4 m) long with a longest span of 80 ft (24.4 m) and a deck 36 ft wide.

Who owns S6869;FSH Hatchry over Big Lost River(pence Br)?

It is owned by the Other Local Agency.