US Bridges

75th Ave NE over Labish Ditch

Poor

Marion County, Oregon · 032 MI E Brooklake I-5 Jt · Structure no. 47C45 624

Built
1963
62 years old
Condition
Poor
inspected August 2024
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
142
2020 count
Owner
County
County Highway Agency

About this bridge

75th Ave NE over Labish Ditch is a wood or timber slab carrying 75th Ave NE over Labish Ditch in Marion County, Oregon. It was built in 1963, so it is 62 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 142 vehicles a day, roughly 5% of them trucks, projected to reach 162 by 2025. The structure is 25 ft (7.6 m) long and 23 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
Carries75th Ave NE
CrossesLabish Ditch
Location032 MI E Brooklake I-5 Jt
RouteCounty Highway C0624
CountyMarion County
StateOregon
Coordinates45.04565, -122.90753
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic142 (2020)
Projected traffic162 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$166,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 75th Ave NE over Labish Ditch built?

It was built in 1963, making it 62 years old in 2025.

What condition is 75th Ave NE over Labish Ditch 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 August 2024.

How much traffic does 75th Ave NE over Labish Ditch carry?

About 142 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is 75th Ave NE over Labish Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 23 ft wide.

Who owns 75th Ave NE over Labish Ditch?

It is owned by the County Highway Agency.