Structure 23 0035 · Solano County, CA

State Route 84 over Miner Slough

Carries State Route 84 over Miner Slough, 04-sol-084-12.09.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT367 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 5/9

367 ft end to end, longest span 191 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 swing bridge (drawn closed).

Built1933rebuilt 1953
Length367.1 ft111.9 m
Daily traffic288counted 2009
Last inspectedApril 2024every 24 months

Location

StateCalifornia
CountySolano
Location04-sol-084-12.09
CarriesState Route 84
CrossesMiner Slough
Coordinates38.29139, -121.63101

Physical Characteristics

MaterialSteel
DesignMovable - Swing
Total Length367.1 ft (111.9 m)
Max Span190.9 ft (58.2 m)
Deck Width19.0 ft (5.8 m)
Deck Area649.0 sq m
Main Spans2
Year Built1933 (reconstructed 1953)

Traffic

Avg Daily Traffic288 (2009)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number23 0035

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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