US Bridges

Stc 8223;KARCHER R over I 84;KARCHER Road Gs

Good

Canyon County, Idaho · In Nampa;karcher Road · Structure no. 000000000021826

Built
2019
6 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
277 ft
2 main spans
Daily traffic
11,500
2023 count
Owner
State
State Highway Agency

About this bridge

Stc 8223;KARCHER R over I 84;KARCHER Road Gs is a prestressed concrete stringer/multi-beam or girder carrying Stc 8223;KARCHER R over I 84;KARCHER Road Gs in Canyon 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 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 11,500 vehicles a day, roughly 10% of them trucks, projected to reach 17,250 by 2042. The structure is 277 ft (84.3 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesStc 8223;KARCHER R
CrossesI 84;KARCHER Road Gs
LocationIn Nampa;karcher Road
RouteCounty Highway 8223
CountyCanyon County
StateIdaho
Coordinates43.60499, -116.59054
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length277 ft (84.3 m)
Longest span135 ft (41 m)
Deck width43 ft (13.1 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2023)
Projected traffic17,250 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Stc 8223;KARCHER R over I 84;KARCHER Road Gs built?

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

What condition is Stc 8223;KARCHER R over I 84;KARCHER Road Gs 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 April 2023.

How much traffic does Stc 8223;KARCHER R over I 84;KARCHER Road Gs carry?

About 11,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stc 8223;KARCHER R over I 84;KARCHER Road Gs?

The structure is 277 ft (84.3 m) long with a longest span of 135 ft (41 m) and a deck 43 ft wide.

Who owns Stc 8223;KARCHER R over I 84;KARCHER Road Gs?

It is owned by the State Highway Agency.