US Bridges

Fern Flat Road over East Fork Dairy Creek

Fair

Washington County, Oregon · 009 MI N Greener Road · Structure no. 18741 065900090

Built
1998
27 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
43
2020 count
Owner
County
County Highway Agency

About this bridge

Fern Flat Road over East Fork Dairy Creek is a prestressed concrete slab carrying Fern Flat Road over East Fork Dairy Creek in Washington County, Oregon. It was built in 1998, so it is 27 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.

It carries about 43 vehicles a day, projected to reach 48 by 2025. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesFern Flat Road
CrossesEast Fork Dairy Creek
Location009 MI N Greener Road
RouteCounty Highway C0241
StateOregon
Coordinates45.743, -123.06752
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43 (2020)
Projected traffic48 by 2025
Trucks0%
Lanes on structure2
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 Road over East Fork Dairy Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Fern Flat Road over East Fork Dairy 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 Road over East Fork Dairy Creek carry?

About 43 vehicles per day (2020 count).

How long is Fern Flat Road over East Fork Dairy Creek?

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 24 ft wide.

Who owns Fern Flat Road over East Fork Dairy Creek?

It is owned by the County Highway Agency.