Umptanum Road over Yakima River

Fair Condition55 years old6,083 vehicles/day

Location

StateWashington
CountyKittitas
Location00.37 W I-90
CarriesUmptanum Road
CrossesYakima River
Coordinates46.97771, -120.56746

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical3 — Scour critical

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length306.1 ft (93.3 m)
Max Span169.9 ft (51.8 m)
Deck Width32.2 ft (9.8 m)
Deck Area914.3 sq m
Main Spans1
Year Built1971

Traffic

Avg Daily Traffic6,083 (2022)
Truck Traffic25%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Structure Number081098000000000

Nearby Bridges

I-90 over Umptanum RD 0.4 mi Good I-90 over Umptanum RD 0.4 mi Poor Umptanum Road over Anderson Slough 0.5 mi Fair Umptanum Road over Wilson Creek 0.8 mi Fair Anderson RD over Mercer Creek 0.8 mi Good I-90 over Reeser Creek 0.9 mi Fair I-90 over Reeser Creek 0.9 mi Fair I-90 over Wilson Creek 1.0 mi Poor I-90 over Wilson Creek 1.0 mi Fair Railroad Avenue over Mercer Creek 1.2 mi Fair