US Bridges

Road over Pinhead Creek

Fair

Clackamas County, Oregon · S-07 T-7S R-8E Wm · Structure no. 060603000001443

Built
1956
69 years old
Condition
Fair
inspected October 2023
Type
Frame
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
270
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Pinhead Creek is a concrete continuous frame carrying Road over Pinhead Creek in Clackamas County, Oregon. It was built in 1956, so it is 69 years old, older than the Oregon average of 49.9 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 270 vehicles a day, roughly 15% of them trucks, projected to reach 405 by 2045. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesRoad
CrossesPinhead Creek
LocationS-07 T-7S R-8E Wm
RouteFederal Lands Road 46000
CountyClackamas County
StateOregon
Coordinates44.98256, -121.88221
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.2 US tons
Inventory rating31.6 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length100 ft (30.5 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2006)
Projected traffic405 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-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 Pinhead Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Road over Pinhead 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 Road over Pinhead Creek carry?

About 270 vehicles per day (2006 count), of which roughly 15% are trucks.

How long is Road over Pinhead Creek?

The structure is 100 ft (30.5 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns Road over Pinhead Creek?

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