US Bridges

SR 410 over 166th Ave

Fair

Pierce County, Washington · 1.1 E JCT SR 162 · Structure no. 0008402A0000000

Built
1968
57 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
147 ft
3 main spans
Daily traffic
21,331
2023 count
Owner
State
State Highway Agency

About this bridge

SR 410 over 166th Ave is a prestressed concrete stringer/multi-beam or girder carrying SR 410 over 166th Ave in Pierce County, Washington. It was built in 1968, so it is 57 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 21,331 vehicles a day, roughly 7% of them trucks, projected to reach 31,339 by 2039. The structure is 147 ft (44.8 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 410
Crosses166th Ave
Location1.1 E JCT SR 162
RouteState Highway 410
CountyPierce County
StateWashington
Coordinates47.19822, -122.20847
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length147 ft (44.8 m)
Longest span61 ft (18.6 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,331 (2023)
Projected traffic31,339 by 2039
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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$2.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 410 over 166th Ave built?

It was built in 1968, making it 57 years old in 2025.

What condition is SR 410 over 166th Ave 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 April 2023.

How much traffic does SR 410 over 166th Ave carry?

About 21,331 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 410 over 166th Ave?

The structure is 147 ft (44.8 m) long with a longest span of 61 ft (18.6 m) and a deck 41 ft wide.

Who owns SR 410 over 166th Ave?

It is owned by the State Highway Agency.