US Bridges

SR 165 over Carbon River

PoorPosted for load

Pierce County, Washington · 11.5 N Rainier Park · Structure no. 0002950A0000000

Built
1921
104 years old, rebuilt 1945
Condition
Poor
inspected February 2024
Type
Arch - Deck
Steel Continuous
Length
494 ft
1 main span
Daily traffic
270
2023 count
Owner
State
State Highway Agency

About this bridge

SR 165 over Carbon River is a steel continuous arch - deck carrying SR 165 over Carbon River in Pierce County, Washington. It was built in 1921 and reconstructed in 1945, so it is 104 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 3 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. Its operating status is: posted for load restriction.

It carries about 270 vehicles a day, roughly 8% of them trucks, projected to reach 464 by 2039. The structure is 494 ft (150.6 m) long and 19 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

CarriesSR 165
CrossesCarbon River
Location11.5 N Rainier Park
RouteState Highway 165
Coordinates47.04153, -122.04197
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.2 US tons
Inventory rating5.4 US tons

Structure

Structure typeArch - Deck
MaterialSteel Continuous
DeckWood or timber
Main spans1 (+18 approach)
Design loadUnknown
Structure length494 ft (150.6 m)
Longest span240 ft (73.2 m)
Deck width19 ft (5.8 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2023)
Projected traffic464 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 165 over Carbon River built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1945.

What condition is SR 165 over Carbon River 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 February 2024.

How much traffic does SR 165 over Carbon River carry?

About 270 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 165 over Carbon River?

The structure is 494 ft (150.6 m) long with a longest span of 240 ft (73.2 m) and a deck 19 ft wide.

Who owns SR 165 over Carbon River?

It is owned by the State Highway Agency.