USGS Water-Year Summary for Site 254950080180801

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	62610 Elevation, GW, NGVD29(Max.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

254950080180801 G - 3. USGS Observation Well in Miami Springs, FL.

Biscayne aquifer
Biscayne Limestone Aquifer

LOCATION - Lat 25°49'51.0", long 80°18'06.8" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 SW 1/4 sec.13, T.53 S., R.40 E., Miami-Dade County, FL, Hydrologic Unit 03090202, at northwest corner of Hammond Drive and Ibis Avenue.

REVISIONS HISTORY - Revisions: Discrete water-level measurement in May 3, 1978, was revised on February 14, 2019, water level measurement has been calculated incorrectly. Revisions: Highest daily maximum water level, was revised on February 14, 2019, based on changes to the base datum.

GROUNDWATER RECORDS

WELL CHARACTERISTICS - Depth 9.50 ft. Upper casing diameter 6 in; top of first opening 8.25 ft, bottom of last opening 8.5 ft. See REMARKS.

DATUM - Land-surface datum is 6.20 ft above National Geodetic Vertical Datum of 1929. Measuring point: top of base, 8.2 ft above National Geodetic Vertical Datum of 1929, Feb. 1, 1940 to present; top of base, 8.08 ft above National Geodetic Vertical Datum of 1929, Feb. 15, 1940 to Sep. 28, 1956; top of base, 9.19 ft above National Geodetic Vertical Datum of 1929, May. 15, 1958 to May. 17, 1962; top of casing, 6.33 ft above National Geodetic Vertical Datum of 1929, May. 18, 1962 to Jan. 1, 1968; top of coupling, 6.3 ft above National Geodetic Vertical Datum of 1929, Jan. 1, 1968 to Jun. 11, 1982; top of base, 6.67 ft above National Geodetic Vertical Datum of 1929, Jun. 10, 1982 to Oct. 1, 1987. See REMARKS.

PERIOD OF RECORD - February 1940 to September 1956, May 1958 to October 2023.

GAGE - Electronic data logger with water level

REMARKS - Water levels affected by pumping. The well has been reported as open to the aquifer from 6 to 20 ft, based on field notes from 1968. However, it appears the well was only drilled to a depth of about 8.5 ft below land surface in 1940. Attempts to clear the well beyond that depth have not been successful. However, water-level data for water-level elevations above -2.24 ft NGVD are considered valid. See WELL CHARACTERISTICS. The station has been reconstructed on several occasions, most recently after being destroyed in September 1987. See DATUM. Records of water levels prior to October 1973 are available in files of the U.S. Geological Survey.

EXTREMES FOR PERIOD OF RECORD - Highest water level, 5.43 ft NGVD, Oct. 15, 16,1999; lowest measured, 3.12 ft below NGVD, May 5, 1993.