US Bridges

Fern Flat Rd. over Roundy Creek

FairPosted for load

Washington County, Oregon · 3.18 Mile N Snooseville C · Structure no. 22504 000 00229

Built
2010
15 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
33
2020 count
Owner
County
County Highway Agency

About this bridge

Fern Flat Rd. over Roundy Creek is a steel stringer/multi-beam or girder carrying Fern Flat Rd. over Roundy Creek in Washington County, Oregon. It was built in 2010, so it is 15 years old, younger 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 33 vehicles a day, projected to reach 39 by 2025. The structure is 50 ft (15.2 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesFern Flat Rd.
CrossesRoundy Creek
Location3.18 Mile N Snooseville C
RouteCounty Highway C0241
CountyWashington County
StateOregon
Coordinates45.75218, -123.07632
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating19 US tons
Inventory rating14.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span46 ft (14 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33 (2020)
Projected traffic39 by 2025
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Fern Flat Rd. over Roundy Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Fern Flat Rd. over Roundy 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 July 2024.

How much traffic does Fern Flat Rd. over Roundy Creek carry?

About 33 vehicles per day (2020 count).

How long is Fern Flat Rd. over Roundy Creek?

The structure is 50 ft (15.2 m) long with a longest span of 46 ft (14 m) and a deck 12 ft wide.

Who owns Fern Flat Rd. over Roundy Creek?

It is owned by the County Highway Agency.