Structure 11802A0000000 · Pierce County, WA

SR 165 over So Prairie Crk

Carries SR 165 over So Prairie Crk, 18.8 N Rainier Park.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT571 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

571 ft end to end, longest span 283 ft: about 1.6 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built198145 years old
Length570.9 ft174 m
Daily traffic4,521counted 2023
Last inspectedApril 2023every 24 months

Location

StateWashington
CountyPierce
Location18.8 N Rainier Park
CarriesSR 165
CrossesSo Prairie Crk
Coordinates47.13092, -122.04911

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length570.9 ft (174 m)
Max Span283.1 ft (86.3 m)
Deck Width39.0 ft (11.9 m)
Deck Area2070.6 sq m
Main Spans2
Year Built1981

Traffic

Avg Daily Traffic4,521 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical9 — Foundation above flood level
Structure Number0011802A0000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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