Structure 740053 · Nassau County, FL

CR 121 over Deep Creek

Carries CR 121 over Deep Creek, 3.5 Mi North Of CR 119.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 43 ft across with 4 openings. 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, so those are drawn as typical for a culvert.

Built194977 years old
Length42.7 ft13 m
Daily traffic3,100counted 2024
Last inspectedJune 2024every 24 months

Location

StateFlorida
CountyNassau
Location3.5 Mi North Of CR 119
CarriesCR 121
CrossesDeep Creek
Coordinates30.45583, -82.00389

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length42.7 ft (13 m)
Max Span10.8 ft (3.3 m)
Deck Area94.9 sq m
Main Spans4
Year Built1949

Traffic

Avg Daily Traffic3,100 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number740053

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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