US Bridges

Adams RD over I-90

Poor

Grant County, Washington · 2.9 E JCT SR 281 · Structure no. 0005688A0000000

Built
1958
67 years old, rebuilt 1992
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
220 ft
4 main spans
Daily traffic
1,465
2012 count
Owner
State
State Highway Agency

About this bridge

Adams RD over I-90 is a prestressed concrete stringer/multi-beam or girder carrying Adams RD 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 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 1,465 vehicles a day, roughly 5% of them trucks. The structure is 220 ft (67.1 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesAdams RD
CrossesI-90
Location2.9 E JCT SR 281
RouteCounty Highway 0
Coordinates47.10321, -119.76879
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 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 width33 ft (10 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,465 (2012)
Projected traffic—
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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$3.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Adams RD over I-90 built?

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

What condition is Adams RD over I-90 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 September 2023.

How much traffic does Adams RD over I-90 carry?

About 1,465 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Adams RD 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 33 ft wide.

Who owns Adams RD over I-90?

It is owned by the State Highway Agency.