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
Lake Jessup Spring main view

Lake Jessup Spring main view

Lake Jessup Spring

Seminole County

Description

Lake Jessup Spring is a man-made, third-magnitude spring situated in a small cove on the south edge of Lake Jesup. The spring pool is about 50 feet in diameter. The spring flow reportedly issues from sand boils in the center of the circular pool. The run to the lake is about 85 feet long, 6 feet to 7 feet wide, and about 1 foot deep. Spring flow into the lake was visible as a distinct line between the clear spring water and the colored lake water at the lake’s edge.

The spring is reportedly the result of an attempt to excavate a boat slip back from the lakeshore in the spring of 1952. According to local residents, a hole 35-feet-deep washed out in the clay bottom of the excavation as it was being dug. A strong flow of water issued from the hole before it was plugged with logs, clay, and sand. The flow of the spring is now presumably much less than it was when first excavated (Rosenau et al. 1977).

Discharge

Discharge at Lake Jessup Spring was measured by the U.S. Geological Survey (USGS) in 1952 and 1972. The mean discharge was 1.04 cubic feet per second (see the table below).

Water quality

Lake Jessup Spring was sampled once by USGS in 1972. The water quality data for selected variables are shown in the table below.

Summary statistics of water quality and discharge
at Lake Jessup Spring

Lake Jessup Spring Min Mean Median Max Count Period
Discharge, cfs 0.72 1.04 1.04 1.36 2 1952−1972
Alkalinity, total, mg/L as CaCO3 121.0 121.0 121.0 121.0 1 1972
Chloride, total, mg/L as Cl 12.0 12.0 12.0 12.0 1 1972
pH, field 7.80 7.80 7.80 7.80 1 1972
Specific conductance, lab, µmhos/cm at 25°C 270 270 270 270 1 1972
Sulfate, total, mg/L as SO4 11.0 11.0 11.0 11.0 1 1972
Total dissolved solids, mg/L 169 169 169 169 1 1972
Water temperature, °C 24.0 24.0 24.0 24.0 1 1972
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