US Bridges

Matheny RD over Overflow Channel

FairPosted for load

Marion County, Oregon · 00.3 East of Ferry · Structure no. 47C32 504 00000

Built
1973
52 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
109 ft
6 main spans
Daily traffic
1,523
2020 count
Owner
County
County Highway Agency

About this bridge

Matheny RD over Overflow Channel is a wood or timber slab carrying Matheny RD over Overflow Channel in Marion County, Oregon. It was built in 1973, so it is 52 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. Its operating status is: posted for load restriction.

It carries about 1,523 vehicles a day, roughly 8% of them trucks, projected to reach 1,713 by 2025. The structure is 109 ft (33.2 m) long and 25 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesMatheny RD
CrossesOverflow Channel
Location00.3 East of Ferry
RouteCounty Highway A0589
StateOregon
Coordinates45.08983, -123.03973
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadHS 20
Structure length109 ft (33.2 m)
Longest span18 ft (5.5 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,523 (2020)
Projected traffic1,713 by 2025
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$558,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Matheny RD over Overflow Channel built?

It was built in 1973, making it 52 years old in 2025.

What condition is Matheny RD over Overflow Channel 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 August 2024.

How much traffic does Matheny RD over Overflow Channel carry?

About 1,523 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Matheny RD over Overflow Channel?

The structure is 109 ft (33.2 m) long with a longest span of 18 ft (5.5 m) and a deck 25 ft wide.

Who owns Matheny RD over Overflow Channel?

It is owned by the County Highway Agency.