US Bridges

US 97 over Ahtanum Crk RR & Roads

Fair

Yakima County, Washington · 14.5 N JCT SR 22 · Structure no. 0011580B0000000

Built
1981
44 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,206 ft
7 main spans
Daily traffic
9,941
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Ahtanum Crk RR & Roads is a prestressed concrete continuous box beam or girders - multiple carrying US 97 over Ahtanum Crk RR & Roads in Yakima County, Washington. It was built in 1981, so it is 44 years old, younger than the Washington average of 49.8 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 9,941 vehicles a day, roughly 9% of them trucks, projected to reach 14,430 by 2039. The structure is 1,206 ft (367.6 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS 97
CrossesAhtanum Crk RR & Roads
Location14.5 N JCT SR 22
RouteU.S. Route 97
CountyYakima County
StateWashington
Coordinates46.53636, -120.47453
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length1,206 ft (367.6 m)
Longest span172 ft (52.4 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,941 (2023)
Projected traffic14,430 by 2039
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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$16 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Ahtanum Crk RR & Roads built?

It was built in 1981, making it 44 years old in 2025.

What condition is US 97 over Ahtanum Crk RR & Roads 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 US 97 over Ahtanum Crk RR & Roads carry?

About 9,941 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 97 over Ahtanum Crk RR & Roads?

The structure is 1,206 ft (367.6 m) long with a longest span of 172 ft (52.4 m) and a deck 29 ft wide.

Who owns US 97 over Ahtanum Crk RR & Roads?

It is owned by the State Highway Agency.