US Bridges

I-90 over Lower Peoh Pt RD & Trail

Poor

Kittitas County, Washington · 0.8 E JCT SR 970 · Structure no. 0007543A0000000

Built
1965
60 years old
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
375 ft
4 main spans
Daily traffic
14,717
2023 count
Owner
State
State Highway Agency

About this bridge

I-90 over Lower Peoh Pt RD & Trail is a prestressed concrete continuous stringer/multi-beam or girder carrying I-90 over Lower Peoh Pt RD & Trail in Kittitas 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 14,717 vehicles a day, roughly 23% of them trucks, projected to reach 18,248 by 2039. The structure is 375 ft (114.3 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-90
CrossesLower Peoh Pt RD & Trail
Location0.8 E JCT SR 970
RouteInterstate 90
Coordinates47.17564, -120.89136
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length375 ft (114.3 m)
Longest span99 ft (30.2 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,717 (2023)
Projected traffic18,248 by 2039
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$7.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-90 over Lower Peoh Pt RD & Trail built?

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

What condition is I-90 over Lower Peoh Pt RD & Trail 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 June 2023.

How much traffic does I-90 over Lower Peoh Pt RD & Trail carry?

About 14,717 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I-90 over Lower Peoh Pt RD & Trail?

The structure is 375 ft (114.3 m) long with a longest span of 99 ft (30.2 m) and a deck 35 ft wide.

Who owns I-90 over Lower Peoh Pt RD & Trail?

It is owned by the State Highway Agency.