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USGS Water-Year Summary 2024
253902080202501 G - 553. USGS Observation Well near Miami, FL.
Biscayne aquifer
Biscayne Limestone Aquifer
Biscayne Limestone Aquifer
LOCATION - Lat 25°39'03.9", long 80°20'18.0" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SE 1/4 sec.16, T.55 S., R.40 E., Miami-Dade County, FL, Hydrologic Unit 03090202, on the south side of SW 128th Street, 0.5 mi west of US Highway 1, 13 mi southwest of Miami.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 91 ft. Upper casing diameter 24 in; top of first opening 36 ft, bottom of last opening 91 ft. See REMARKS.
DATUM - Land-surface datum is 12.3 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 12.41 ft above National Geodetic Vertical Datum of 1929, Jan. 1, 1947 to Jun. 26, 1970; Top of casing, 12.76 ft above National Geodetic Vertical Datum of 1929, Jul. 2, 1970 to Oct. 2, 1975; Top of casing, 15.11 ft above National Geodetic Vertical Datum of 1929, Oct. 1, 1975 to Oct. 2, 1980; Top of casing, 12.76 ft above National Geodetic Vertical Datum of 1929, Oct. 1, 1980 to Oct. 30, 1992; Top of base, 12.5 ft above National Geodetic Vertical Datum of 1929, Oct. 29, 1992 to Nov. 23, 1999; Top of base, 14.87 ft above National Geodetic Vertical Datum of 1929, Nov. 23, 1999 to Dec. 4, 2012; Top of base, 16.0 ft above National Geodetic Vertical Datum of 1929, Dec. 4, 2012 to Feb. 24, 2021; MP= Black mark on top of shelf, 16.128 ft above National Geodetic Vertical Datum of 1929, Feb. 24, 2021 to present.
PERIOD OF RECORD - July 1947 to current year.
GAGE - Satellite Data Collection Platform with water-level sensor.
COOPERATION - Miami-Dade County.
REMARKS - Records of water levels prior to January 1957 are available in files of the U.S. Geological Survey. Based on a review of historical records, the published records of water level, in ft NGVD, from October 29, 1992 to April 12, 1996 are in error. Station was reconstructed June 1970, November 1992 and November 23, 1999. This well was originally open to the aquifer from 36 to 91 ft. The open interval has collapsed or become obstructed with sand at a depth of 30 ft. Well is still considered in good hydrologic communication with the aquifer.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 9.43 ft NGVD, Oct. 15, 1999; lowest, 1.29 ft NGVD, June 18, 2011.
