US Bridges

SH 14 over Silver Creek

Fair

Idaho County, Idaho · 6.6 W. Golden · Structure no. 000000000010575

Built
1983
42 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
150
2023 count
Owner
State
State Highway Agency

About this bridge

SH 14 over Silver Creek is a prestressed concrete box beam or girders - multiple carrying SH 14 over Silver Creek in Idaho County, Idaho. It was built in 1983, so it is 42 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 150 vehicles a day, roughly 67% of them trucks, projected to reach 225 by 2042. The structure is 65 ft (19.8 m) long and 36 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSH 14
CrossesSilver Creek
Location6.6 W. Golden
RouteState Highway 14
StateIdaho
Coordinates45.80589, -115.79156
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating14 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span64 ft (19.5 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic225 by 2042
Trucks67%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$846,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 14 over Silver Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is SH 14 over Silver 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 October 2023.

How much traffic does SH 14 over Silver Creek carry?

About 150 vehicles per day (2023 count), of which roughly 67% are trucks.

How long is SH 14 over Silver Creek?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 36 ft wide.

Who owns SH 14 over Silver Creek?

It is owned by the State Highway Agency.