US Bridges

SH 13 over S.F.Clearwater;harpster

Fair

Idaho County, Idaho · 1.1 S. Harpster · Structure no. 000000000010535

Built
1985
40 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
199 ft
2 main spans
Daily traffic
990
2023 count
Owner
State
State Highway Agency

About this bridge

SH 13 over S.F.Clearwater;harpster is a prestressed concrete stringer/multi-beam or girder carrying SH 13 over S.F.Clearwater;harpster in Idaho County, Idaho. It was built in 1985, so it is 40 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 990 vehicles a day, roughly 15% of them trucks, projected to reach 1,485 by 2042. The structure is 199 ft (60.7 m) long and 37 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

Location

Open in Google Maps
CarriesSH 13
CrossesS.F.Clearwater;harpster
Location1.1 S. Harpster
RouteState Highway 13
CountyIdaho County
StateIdaho
Coordinates45.95925, -115.96061
Functional classRural Minor Arterial

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 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length199 ft (60.7 m)
Longest span100 ft (30.5 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2023)
Projected traffic1,485 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 13 over S.F.Clearwater;harpster built?

It was built in 1985, making it 40 years old in 2025.

What condition is SH 13 over S.F.Clearwater;harpster 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 13 over S.F.Clearwater;harpster carry?

About 990 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is SH 13 over S.F.Clearwater;harpster?

The structure is 199 ft (60.7 m) long with a longest span of 100 ft (30.5 m) and a deck 37 ft wide.

Who owns SH 13 over S.F.Clearwater;harpster?

It is owned by the State Highway Agency.