US Bridges

Road over Squirrel Creek

Good

Marion County, Oregon · S-20 T-8S R-8E Wm · Structure no. 060603000001578

Built
1960
65 years old, rebuilt 2002
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
85 ft
3 main spans
Daily traffic
170
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Squirrel Creek is a wood or timber stringer/multi-beam or girder carrying Road over Squirrel Creek in Marion County, Oregon. It was built in 1960 and reconstructed in 2002, so it is 65 years old, older than the Oregon average of 49.9 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 170 vehicles a day, roughly 10% of them trucks, projected to reach 255 by 2045. The structure is 85 ft (25.8 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesRoad
CrossesSquirrel Creek
LocationS-20 T-8S R-8E Wm
RouteFederal Lands Road 46900
StateOregon
Coordinates44.86892, -121.84582
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44.1 US tons
Inventory rating33.1 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadOther
Structure length85 ft (25.8 m)
Longest span59 ft (18 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2006)
Projected traffic255 by 2045
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 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 Road over Squirrel Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2002.

What condition is Road over Squirrel Creek 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 2023.

How much traffic does Road over Squirrel Creek carry?

About 170 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is Road over Squirrel Creek?

The structure is 85 ft (25.8 m) long with a longest span of 59 ft (18 m) and a deck 16 ft wide.

Who owns Road over Squirrel Creek?

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