US Bridges

Riverside RD over Overflow Channel

FairPosted for load

Marion County, Oregon · 02.0SE of Independence Br · Structure no. 47C75 906 00000

Built
1971
54 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
92 ft
5 main spans
Daily traffic
1,093
2020 count
Owner
County
County Highway Agency

About this bridge

Riverside RD over Overflow Channel is a wood or timber slab carrying Riverside RD over Overflow Channel in Marion County, Oregon. It was built in 1971, so it is 54 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 1,093 vehicles a day, roughly 2% of them trucks, projected to reach 1,213 by 2025. The structure is 92 ft (28 m) long and 25 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesRiverside RD
CrossesOverflow Channel
Location02.0SE of Independence Br
RouteCounty Highway A0573
CountyMarion County
StateOregon
Coordinates44.83602, -123.13907
Functional classRural Minor 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 20
Structure length92 ft (28 m)
Longest span18 ft (5.5 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,093 (2020)
Projected traffic1,213 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Riverside RD over Overflow Channel built?

It was built in 1971, making it 54 years old in 2025.

What condition is Riverside 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 Riverside RD over Overflow Channel carry?

About 1,093 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Riverside RD over Overflow Channel?

The structure is 92 ft (28 m) long with a longest span of 18 ft (5.5 m) and a deck 25 ft wide.

Who owns Riverside RD over Overflow Channel?

It is owned by the County Highway Agency.