US Bridges

Hiawatha RD NE over I-90

Fair

Grant County, Washington · 17.9 E JCT SR 281 · Structure no. 0005688B0000000

Built
1958
67 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
220 ft
4 main spans
Daily traffic
566
2012 count
Owner
State
State Highway Agency

About this bridge

Hiawatha RD NE over I-90 is a prestressed concrete stringer/multi-beam or girder carrying Hiawatha RD NE over I-90 in Grant County, Washington. It was built in 1958 and reconstructed in 1992, so it is 67 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 566 vehicles a day, roughly 5% of them trucks. The structure is 220 ft (67.1 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesHiawatha RD NE
CrossesI-90
Location17.9 E JCT SR 281
RouteCounty Highway 0
Coordinates47.10435, -119.44947
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span56 ft (17.1 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic566 (2012)
Projected traffic—
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hiawatha RD NE over I-90 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1992.

What condition is Hiawatha RD NE over I-90 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 Hiawatha RD NE over I-90 carry?

About 566 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Hiawatha RD NE over I-90?

The structure is 220 ft (67.1 m) long with a longest span of 56 ft (17.1 m) and a deck 31 ft wide.

Who owns Hiawatha RD NE over I-90?

It is owned by the State Highway Agency.