Structure 80008000000000 · Kittitas County, WA

Morrison Road over Gravity Canal

Carries Morrison Road over Gravity Canal, 01.51 E Up Bdger Pk.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

27 ft end to end. Lengths and the car 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.

Built1960rebuilt 1969
Length26.9 ft8.2 m
Daily traffic103counted 2023
Last inspectedOctober 2023every 24 months

Location

StateWashington
CountyKittitas
Location01.51 E Up Bdger Pk
CarriesMorrison Road
CrossesGravity Canal
Coordinates46.89716, -120.31782

Physical Characteristics

MaterialConcrete Continuous
DesignStringer/Multi-beam
Total Length26.9 ft (8.2 m)
Max Span24.9 ft (7.6 m)
Deck Width25.9 ft (7.9 m)
Deck Area64.8 sq m
Main Spans1
Year Built1960 (reconstructed 1969)

Traffic

Avg Daily Traffic103 (2023)
Truck Traffic45%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number080008000000000

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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