Structure 79791000000000 · King County, WA

148th AVE SE over May Creek

Carries 148th AVE SE over May Creek, 0.8 Mi N Of Sr-900.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
21 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 5/9

21 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 tee-beam bridge.

Built195175 years old
Length21.0 ft6.4 m
Daily traffic3,900counted 2019
Last inspectedJune 2023every 24 months

Location

StateWashington
CountyKing
Location0.8 Mi N Of Sr-900
Carries148th AVE SE
CrossesMay Creek
Coordinates47.51522, -122.14317

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length21.0 ft (6.4 m)
Max Span21.0 ft (6.4 m)
Deck Width24.0 ft (7.3 m)
Deck Area46.7 sq m
Main Spans1
Year Built1951

Traffic

Avg Daily Traffic3,900 (2019)
Truck Traffic31%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number079791000000000

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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