US Bridges

STC3814;OLD HWY 30 over Clover Creek;king Hill

Fair

Elmore County, Idaho · 1.5 E. King Hill · Structure no. 000000000019895

Built
1970
55 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
171 ft
3 main spans
Daily traffic
160
2023 count
Owner
Local
Other Local Agency

About this bridge

STC3814;OLD HWY 30 over Clover Creek;king Hill is a prestressed concrete stringer/multi-beam or girder carrying STC3814;OLD HWY 30 over Clover Creek;king Hill in Elmore County, Idaho. It was built in 1970, so it is 55 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 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 171 ft (52.1 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSTC3814;OLD HWY 30
CrossesClover Creek;king Hill
Location1.5 E. King Hill
RouteCounty Highway 3814
StateIdaho
Coordinates43.00108, -115.1815
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span58 ft (17.7 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 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 closed3.7 mi (6 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 STC3814;OLD HWY 30 over Clover Creek;king Hill built?

It was built in 1970, making it 55 years old in 2025.

What condition is STC3814;OLD HWY 30 over Clover Creek;king Hill 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 STC3814;OLD HWY 30 over Clover Creek;king Hill carry?

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

How long is STC3814;OLD HWY 30 over Clover Creek;king Hill?

The structure is 171 ft (52.1 m) long with a longest span of 58 ft (17.7 m) and a deck 34 ft wide.

Who owns STC3814;OLD HWY 30 over Clover Creek;king Hill?

It is owned by the Other Local Agency.