US Bridges

STC4747;BIG Canyon over Bear Creek

Good

Nez Perce County, Idaho · At Peck Ncl · Structure no. 000000000020236

Built
2019
6 years old
Condition
Good
inspected May 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
510
2023 count
Owner
County
County Highway Agency

About this bridge

STC4747;BIG Canyon over Bear Creek is a steel stringer/multi-beam or girder carrying STC4747;BIG Canyon over Bear Creek in Nez Perce County, Idaho. It was built in 2019, so it is 6 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 510 vehicles a day, roughly 24% of them trucks, projected to reach 765 by 2042. The structure is 53 ft (16.2 m) long and 28 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesSTC4747;BIG Canyon
CrossesBear Creek
LocationAt Peck Ncl
RouteCounty Highway 4747
CountyNez Perce County
StateIdaho
Coordinates46.47847, -116.42519
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2022
Inspection intervalevery 48 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 alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length53 ft (16.2 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2023)
Projected traffic765 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 STC4747;BIG Canyon over Bear Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is STC4747;BIG Canyon over Bear Creek 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 May 2022.

How much traffic does STC4747;BIG Canyon over Bear Creek carry?

About 510 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is STC4747;BIG Canyon over Bear Creek?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns STC4747;BIG Canyon over Bear Creek?

It is owned by the County Highway Agency.