Structure 85123000000000 · Spokane County, WA

Mission Avenue over Spokane River

Carries Mission Avenue over Spokane River, 1.13 E Of Sr395.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT390 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

390 ft end to end, longest span 76 ft: about 5 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 deck arch.

Built1909117 years old
Length390.1 ft118.9 m
Daily traffic19,319counted 2023
Last inspectedAugust 2023every 24 months

Location

StateWashington
CountySpokane
Location1.13 E Of Sr395
CarriesMission Avenue
CrossesSpokane River
Coordinates47.67175, -117.38762

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length390.1 ft (118.9 m)
Max Span76.1 ft (23.2 m)
Deck Width58.1 ft (17.7 m)
Deck Area2104.5 sq m
Main Spans5
Year Built1909

Traffic

Avg Daily Traffic19,319 (2023)
Truck Traffic2%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number085123000000000

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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