US Bridges

STC3808;N. Idaho over Snake River(kinghill Br)

Fair

Elmore County, Idaho · 0.2 S. Kinghill · Structure no. 000000000019866

Built
2001
24 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
360 ft
3 main spans
Daily traffic
160
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3808;N. Idaho over Snake River(kinghill Br) is a prestressed concrete stringer/multi-beam or girder carrying STC3808;N. Idaho over Snake River(kinghill Br) in Elmore County, Idaho. It was built in 2001, so it is 24 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 160 vehicles a day, roughly 23% of them trucks, projected to reach 240 by 2042. The structure is 360 ft (109.7 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSTC3808;N. Idaho
CrossesSnake River(kinghill Br)
Location0.2 S. Kinghill
RouteCounty Highway 3808
CountyElmore County
StateIdaho
Coordinates43.00106, -115.20881
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating97 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length360 ft (109.7 m)
Longest span131 ft (39.9 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic240 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 STC3808;N. Idaho over Snake River(kinghill Br) built?

It was built in 2001, making it 24 years old in 2025.

What condition is STC3808;N. Idaho over Snake River(kinghill Br) 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 March 2023.

How much traffic does STC3808;N. Idaho over Snake River(kinghill Br) carry?

About 160 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is STC3808;N. Idaho over Snake River(kinghill Br)?

The structure is 360 ft (109.7 m) long with a longest span of 131 ft (39.9 m) and a deck 24 ft wide.

Who owns STC3808;N. Idaho over Snake River(kinghill Br)?

It is owned by the Other Local Agency.