US Bridges

SR 165 over So Prairie Crk

Good

Pierce County, Washington · 18.8 N Rainier Park · Structure no. 0011802A0000000

Built
1981
44 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
571 ft
2 main spans
Daily traffic
4,521
2023 count
Owner
State
State Highway Agency

About this bridge

SR 165 over So Prairie Crk is a steel continuous stringer/multi-beam or girder carrying SR 165 over So Prairie Crk in Pierce County, Washington. It was built in 1981, so it is 44 years old, younger 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 4,521 vehicles a day, roughly 8% of them trucks, projected to reach 6,909 by 2039. The structure is 571 ft (174 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR 165
CrossesSo Prairie Crk
Location18.8 N Rainier Park
RouteState Highway 165
CountyPierce County
StateWashington
Coordinates47.13092, -122.04911
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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length571 ft (174 m)
Longest span283 ft (86.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,521 (2023)
Projected traffic6,909 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$9.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 165 over So Prairie Crk built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR 165 over So Prairie Crk 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 2023.

How much traffic does SR 165 over So Prairie Crk carry?

About 4,521 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 165 over So Prairie Crk?

The structure is 571 ft (174 m) long with a longest span of 283 ft (86.3 m) and a deck 39 ft wide.

Who owns SR 165 over So Prairie Crk?

It is owned by the State Highway Agency.