US Bridges

NE 18th ST over I-205

Good

Clark County, Washington · 2.3 N JCT SR 14 · Structure no. 0009448C0000000

Built
1974
51 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
276 ft
2 main spans
Daily traffic
11,445
2022 count
Owner
State
State Highway Agency

About this bridge

NE 18th ST over I-205 is a prestressed concrete continuous box beam or girders - multiple carrying NE 18th ST over I-205 in Clark County, Washington. It was built in 1974, so it is 51 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,445 vehicles a day, roughly 10% of them trucks, projected to reach 17,199 by 2039. The structure is 276 ft (84.1 m) long and 58 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNE 18th ST
CrossesI-205
Location2.3 N JCT SR 14
RouteCity Street 0
Coordinates45.63553, -122.56139
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating99 US tons
Inventory rating88 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length276 ft (84.1 m)
Longest span135 ft (41.1 m)
Deck width58 ft (17.7 m)
Roadway width45 ft (13.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,445 (2022)
Projected traffic17,199 by 2039
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$6.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NE 18th ST over I-205 built?

It was built in 1974, making it 51 years old in 2025.

What condition is NE 18th ST over I-205 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does NE 18th ST over I-205 carry?

About 11,445 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is NE 18th ST over I-205?

The structure is 276 ft (84.1 m) long with a longest span of 135 ft (41.1 m) and a deck 58 ft wide.

Who owns NE 18th ST over I-205?

It is owned by the State Highway Agency.