US Bridges

SR 14 over Alder Creek

Poor

Klickitat County, Washington · 47.6 E JCT US 97 · Structure no. 000000OD0000000

Built
1965
60 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
218 ft
3 main spans
Daily traffic
936
2023 count
Owner
State
State Highway Agency

About this bridge

SR 14 over Alder Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 14 over Alder Creek in Klickitat County, Washington. It was built in 1965, so it is 60 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 936 vehicles a day, roughly 55% of them trucks, projected to reach 1,292 by 2039. The structure is 218 ft (66.4 m) long and 33 ft wide. If it were closed, the detour would be 41 mi (66 km).

Location

Open in Google Maps
CarriesSR 14
CrossesAlder Creek
Location47.6 E JCT US 97
RouteState Highway 14
CountyKlickitat County
StateWashington
Coordinates45.83583, -119.92944
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating76.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span73 ft (22.3 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic936 (2023)
Projected traffic1,292 by 2039
Trucks55%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 14 over Alder Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR 14 over Alder Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does SR 14 over Alder Creek carry?

About 936 vehicles per day (2023 count), of which roughly 55% are trucks.

How long is SR 14 over Alder Creek?

The structure is 218 ft (66.4 m) long with a longest span of 73 ft (22.3 m) and a deck 33 ft wide.

Who owns SR 14 over Alder Creek?

It is owned by the State Highway Agency.