US Bridges

HWY 29 over Carpenter Creek

Fair

Washington County, Oregon · 006 MI S Forest Grove Scl · Structure no. 09638 029 01999

Built
1975
50 years old
Condition
Fair
inspected April 2024
Type
Slab
Prestressed Concrete
Length
75 ft
3 main spans
Daily traffic
13,005
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 29 over Carpenter Creek is a prestressed concrete slab carrying HWY 29 over Carpenter Creek in Washington County, Oregon. It was built in 1975, so it is 50 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 13,005 vehicles a day, roughly 7% of them trucks, projected to reach 18,500 by 2042. The structure is 75 ft (22.9 m) long and 84 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesHWY 29
CrossesCarpenter Creek
Location006 MI S Forest Grove Scl
RouteState Highway 47
CountyWashington County
StateOregon
Coordinates45.5022, -123.116
Functional classUrban 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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span25 ft (7.7 m)
Deck width84 ft (25.6 m)
Roadway width73 ft (22.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,005 (2022)
Projected traffic18,500 by 2042
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed13 mi (21 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 Carpenter Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is HWY 29 over Carpenter 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 April 2024.

How much traffic does HWY 29 over Carpenter Creek carry?

About 13,005 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is HWY 29 over Carpenter Creek?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.7 m) and a deck 84 ft wide.

Who owns HWY 29 over Carpenter Creek?

It is owned by the State Highway Agency.