USGS Water-Year Summary 2021
254000080460001 G 620. USGS Observation Well in Everglades National Park, FL.
Biscayne Limestone Aquifer
LOCATION - Lat 25°39'22.0", long 80°45'59.2" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 sec.30, T.55 S., R.36 E., Miami-Dade County, FL, Hydrologic Unit 03090202, at look-out tower in Everglades National Park, 6.5 mi south of U.S. Highway 41, and 18.9 mi southwest of the intersection of U.S. Highway 41 and State Road 997.
WELL CHARACTERISTICS - Depth 16.6 ft. Upper casing diameter 6 in; top of first opening 6.2 ft, bottom of last opening 16.6 ft.
DATUM - Land-surface datum is 6.80 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of shelf, 9.85 ft above National Geodetic Vertical Datum of 1929, Sep. 7, 2005 to present. Land-surface datum is 5.28 ft (Revised), above North American Vertical Datum of 1988.
PERIOD OF RECORD - January 1950 to September 1980, November 1982 to current year.
GAGE - Satellite data collection platform.
COOPERATION - South Florida Water Management District, U.S. Army Corps of Engineers, Everglades National Park.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 8.59 ft NGVD, Sept. 10, 2017; lowest daily, 1.86 ft NGVD, May 30, 1965.