Structure 81819000000000 · Thurston County, WA

Connor Road over Skookumchuck River

Carries Connor Road over Skookumchuck River, .03 E Jct Sr507.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT245 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 8/9

245 ft end to end, longest span 84 ft: about 3 semi-trucks nose to tail. 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.

Built198937 years old
Length245.1 ft74.7 m
Daily traffic152counted 2020
Last inspectedOctober 2023every 24 months

Location

StateWashington
CountyThurston
Location.03 E Jct Sr507
CarriesConnor Road
CrossesSkookumchuck River
Coordinates46.77833, -122.91177

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length245.1 ft (74.7 m)
Max Span84.0 ft (25.6 m)
Deck Width27.9 ft (8.5 m)
Deck Area635.0 sq m
Main Spans3
Year Built1989

Traffic

Avg Daily Traffic152 (2020)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number081819000000000

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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