St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District
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Water bodies, watersheds and storm water
Tobacco Patch Landing Springs aerial view

Tobacco Patch Landing Springs aerial view

Tobacco Patch Landing Springs pool

Tobacco Patch Landing Springs pool

Tobacco Patch Landing Springs vent

Tobacco Patch Landing Springs vent

Tobacco Patch Landing Springs

Marion County

Description

Tobacco Patch Landing Springs is a third-magnitude spring that is normally submerged by 4 to 5 feet of water when Rodman Reservoir is at capacity. At times of drawdown in the Rodman Reservoir, the spring pool and vent are more easily discernible (see photographs). The circular pool of the main spring is set at the base of a hill overlooking Rodman Reservoir. The vent is approximately 12 to 15 feet across, with a rock ledge visible on its northern side. During an observed period of low water in the reservoir, water flowed southwest out of the pool and was joined by water coming from the east, and the combined run flowed to the west approximately 0.25 mile to the Ocklawaha River. The source of the water from the east was not determined. About 300 feet west of the spring pool another stream joined the spring run from the southeast, but the source of this water also could not be determined.

Discharge

Tobacco Patch Landing Springs pool and run

Tobacco Patch Landing Springs pool and run

Discharge from Tobacco Patch Landing Springs was measured from the spring pool in March 1999 by the U.S. Geological Survey (USGS), at 2.8 cubic feet per second (cfs). Discharge, sampled on the spring run below the confluence with the nearby stream, was measured in February 2002 by the St. Johns River Water Management District, at 4.98 cfs. The district also measured discharge twice in 2008. The mean discharge for the period of record is 3.92 cfs (see the table below).

Water quality

Tobacco Patch Landing Springs was sampled by USGS in 1999 and by the district in 2002. A summary of the water quality data for selected variables is shown in the table below.

Summary statistics of water quality and discharge
at Tobacco Patch Landing Springs

Tobacco Patch Landing Springs Min Mean Median Max Count Period
Discharge, cfs 2.80 3.92 3.95 4.98 4 1999−2008
Alkalinity, total, mg/L as CaCO3 69.4 69.4 69.4 69.4 1 2002
Calcium, total, mg/L as Ca 80.0 80.0 80.0 80.0 1 2002
Chloride, total, mg/L as Cl 540.0 544.0 544.0 548.0 2 1999−2002
Fluoride, total, mg/L as F 0.14 0.14 0.14 0.14 1 2002
Magnesium, total, mg/L as Mg 33.0 33.0 33.0 33.0 1 2002
Nitrate + nitrite, total, mg/L as N 0.17 0.17 0.17 0.17 1 2002
Orthophosphate, total, mg/L as P 0.02 0.02 0.02 0.02 1 2002
pH, field 6.11 6.81 6.81 7.50 2 1999−2002
Potassium, total, mg/L as K 9.2 9.2 9.2 9.2 1 2002
Sodium, total, mg/L as Na 297.5 297.5 297.5 297.5 1 2002
Specific conductance, field, µmhos/cm at 25°C 2124 2124 2124 2124 1 2002
Specific conductance, lab, µmhos/cm at 25°C 2100 2100 2100 2100 1 1999
Sulfate, total, mg/L as SO4 160.0 162.8 162.8 165.6 2 1999−2002
Total dissolved solids, mg/L 1100 1140 1140 1180 2 1999−2002
Water temperature, °C 22.6 22.7 22.7 22.7 2 1999−2002
Units: µmhos/cm = micromhos per centimeter
         mg/L = milligrams per liter
         cfs = cubic feet per second

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St. Johns River Water Management District
4049 Reid Street, Palatka, FL 32177
(800) 725-5922