US Bridges

Fern Road over Evergreen Creek

Fair

Benton County, Oregon · 1.2MILES S of HWY 20 34 · Structure no. 14199 262 00120

Built
1988
37 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
1,446
2020 count
Owner
County
County Highway Agency

About this bridge

Fern Road over Evergreen Creek is a wood or timber stringer/multi-beam or girder carrying Fern Road over Evergreen Creek in Benton County, Oregon. It was built in 1988, so it is 37 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 1,446 vehicles a day, roughly 10% of them trucks, projected to reach 1,858 by 2040. The structure is 25 ft (7.6 m) long and 31 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesFern Road
CrossesEvergreen Creek
Location1.2MILES S of HWY 20 34
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.52017, -123.36728
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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,446 (2020)
Projected traffic1,858 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Road over Evergreen Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Fern Road over Evergreen 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 Road over Evergreen Creek carry?

About 1,446 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Fern Road over Evergreen Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 31 ft wide.

Who owns Fern Road over Evergreen Creek?

It is owned by the County Highway Agency.