US Bridges

HWY 29 over Pnwr & Scoggin Creek

Poor

Washington County, Oregon · 1.5 MI N Gaston Po · Structure no. 09494 029 02399

Built
1967
58 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
307 ft
4 main spans
Daily traffic
12,233
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 29 over Pnwr & Scoggin Creek is a prestressed concrete stringer/multi-beam or girder carrying HWY 29 over Pnwr & Scoggin Creek in Washington County, Oregon. It was built in 1967, so it is 58 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 12,233 vehicles a day, roughly 7% of them trucks, projected to reach 15,800 by 2042. The structure is 307 ft (93.6 m) long and 47 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesHWY 29
CrossesPnwr & Scoggin Creek
Location1.5 MI N Gaston Po
RouteState Highway 47
CountyWashington County
StateOregon
Coordinates45.4583, -123.14285
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length307 ft (93.6 m)
Longest span82 ft (24.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,233 (2022)
Projected traffic15,800 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 29 over Pnwr & Scoggin Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is HWY 29 over Pnwr & Scoggin Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does HWY 29 over Pnwr & Scoggin Creek carry?

About 12,233 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is HWY 29 over Pnwr & Scoggin Creek?

The structure is 307 ft (93.6 m) long with a longest span of 82 ft (24.9 m) and a deck 47 ft wide.

Who owns HWY 29 over Pnwr & Scoggin Creek?

It is owned by the State Highway Agency.