Structure 38C0027 · Stanislaus County, CA

Grayson Road over Laird Slough

Carries Grayson Road over Laird Slough, 3.1 Mi N/e State Route 33.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT408 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

408 ft end to end, longest span 60 ft: about 6 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 tee-beam bridge.

Built196264 years old
Length408.1 ft124.4 m
Daily traffic5,299counted 2019
Last inspectedOctober 2023every 24 months

Location

StateCalifornia
CountyStanislaus
Location3.1 Mi N/e State Route 33
CarriesGrayson Road
CrossesLaird Slough
Coordinates37.56258, -121.15283

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length408.1 ft (124.4 m)
Max Span60.0 ft (18.3 m)
Deck Width32.8 ft (10 m)
Deck Area1,244 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic5,299 (2019)
Truck Traffic26%
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 Critical5 — Stable for scour
Structure Number38C0027

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.

Nearby Bridges