US Bridges

Huntzinger Road over Wanapum Reservoir

Fair

Kittitas County, Washington · 04.34 S I-90 · Structure no. 082400000000000

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
102 ft
5 main spans
Daily traffic
676
2023 count
Owner
County
County Highway Agency

About this bridge

Huntzinger Road over Wanapum Reservoir is a concrete slab carrying Huntzinger Road over Wanapum Reservoir in Kittitas County, Washington. It was built in 1962, so it is 63 years old, older 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 676 vehicles a day, roughly 12% of them trucks, projected to reach 1,791 by 2043. The structure is 102 ft (31.1 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesHuntzinger Road
CrossesWanapum Reservoir
Location04.34 S I-90
RouteCounty Highway 75040
CountyKittitas County
StateWashington
Coordinates46.87891, -119.98568
Functional classRural Minor 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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5 (+1 approach)
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span97 ft (29.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic676 (2023)
Projected traffic1,791 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Huntzinger Road over Wanapum Reservoir built?

It was built in 1962, making it 63 years old in 2025.

What condition is Huntzinger Road over Wanapum Reservoir 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 September 2024.

How much traffic does Huntzinger Road over Wanapum Reservoir carry?

About 676 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Huntzinger Road over Wanapum Reservoir?

The structure is 102 ft (31.1 m) long with a longest span of 97 ft (29.6 m) and a deck 27 ft wide.

Who owns Huntzinger Road over Wanapum Reservoir?

It is owned by the County Highway Agency.