US Bridges

Shady Dell RD over Molalla Overflow

Fair

Clackamas County, Oregon · 00.0 MI E of Robbins RD · Structure no. 06263 000

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Channel Beam
Concrete
Length
23 ft
1 main span
Daily traffic
338
2020 count
Owner
County
County Highway Agency

About this bridge

Shady Dell RD over Molalla Overflow is a concrete channel beam carrying Shady Dell RD over Molalla Overflow in Clackamas County, Oregon. It was built in 1959, so it is 66 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 5 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 338 vehicles a day, roughly 15% of them trucks, projected to reach 362 by 2025. The structure is 23 ft (7 m) long and 22 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesShady Dell RD
CrossesMolalla Overflow
Location00.0 MI E of Robbins RD
RouteCounty Highway C2665
StateOregon
Coordinates45.14043, -122.53976
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width22 ft (6.8 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic338 (2020)
Projected traffic362 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$118,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Shady Dell RD over Molalla Overflow built?

It was built in 1959, making it 66 years old in 2025.

What condition is Shady Dell RD over Molalla Overflow 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 2023.

How much traffic does Shady Dell RD over Molalla Overflow carry?

About 338 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Shady Dell RD over Molalla Overflow?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 22 ft wide.

Who owns Shady Dell RD over Molalla Overflow?

It is owned by the County Highway Agency.