US Bridges

SH 8 over Little Bear Creek

Fair

Latah County, Idaho · At Troy Wcl · Structure no. 000000000010235

Built
1948
77 years old
Condition
Fair
inspected July 2023
Type
Frame
Concrete
Length
23 ft
1 main span
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

SH 8 over Little Bear Creek is a concrete frame carrying SH 8 over Little Bear Creek in Latah County, Idaho. It was built in 1948, so it is 77 years old, older 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 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 3,400 vehicles a day, roughly 5% of them trucks, projected to reach 5,100 by 2042. The structure is 23 ft (7 m) long and 60 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSH 8
CrossesLittle Bear Creek
LocationAt Troy Wcl
RouteState Highway 8
CountyLatah County
StateIdaho
Coordinates46.737, -116.77389
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating47 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width60 ft (18.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic5,100 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 SH 8 over Little Bear Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is SH 8 over Little Bear Creek 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 SH 8 over Little Bear Creek carry?

About 3,400 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SH 8 over Little Bear Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 60 ft wide.

Who owns SH 8 over Little Bear Creek?

It is owned by the State Highway Agency.