US Bridges

Casto Road over Parrott Creek

Fair

Clackamas County, Oregon · 0.20 MI E of Carus Road · Structure no. 06490 000 00811

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Channel Beam
Concrete
Length
23 ft
1 main span
Daily traffic
473
2020 count
Owner
County
County Highway Agency

About this bridge

Casto Road over Parrott Creek is a concrete channel beam carrying Casto Road over Parrott Creek in Clackamas County, Oregon. It was built in 1962, so it is 63 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 473 vehicles a day, roughly 18% of them trucks, projected to reach 478 by 2025. The structure is 23 ft (7 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCasto Road
CrossesParrott Creek
Location0.20 MI E of Carus Road
RouteCounty Highway C0047
StateOregon
Coordinates45.2682, -122.61786
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.5 US tons
Inventory rating28.9 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 width29 ft (8.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic473 (2020)
Projected traffic478 by 2025
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Casto Road over Parrott Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Casto Road over Parrott 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 2023.

How much traffic does Casto Road over Parrott Creek carry?

About 473 vehicles per day (2020 count), of which roughly 18% are trucks.

How long is Casto Road over Parrott Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns Casto Road over Parrott Creek?

It is owned by the County Highway Agency.