US Bridges

Forest Road 492 over So Fk Clearwater Rv

Good

Idaho County, Idaho · Santiam · Structure no. 011708000000104

Built
1980
45 years old
Condition
Good
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
140 ft
2 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 492 over So Fk Clearwater Rv is a prestressed concrete stringer/multi-beam or girder carrying Forest Road 492 over So Fk Clearwater Rv in Idaho County, Idaho. It was built in 1980, so it is 45 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 140 ft (42.7 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesForest Road 492
CrossesSo Fk Clearwater Rv
LocationSantiam
RouteFederal Lands Road 492
CountyIdaho County
StateIdaho
Coordinates45.82269, -115.63477
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span90 ft (27.3 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road 492 over So Fk Clearwater Rv built?

It was built in 1980, making it 45 years old in 2025.

What condition is Forest Road 492 over So Fk Clearwater Rv 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 October 2022.

How much traffic does Forest Road 492 over So Fk Clearwater Rv carry?

About 50 vehicles per day (latest count).

How long is Forest Road 492 over So Fk Clearwater Rv?

The structure is 140 ft (42.7 m) long with a longest span of 90 ft (27.3 m) and a deck 16 ft wide.

Who owns Forest Road 492 over So Fk Clearwater Rv?

It is owned by the U.S. Forest Service.