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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
324416117042001 016S002W34G001S
LOCATION - Lat 32°44'15.94", long 117°04'20.06" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 NE 1/4 sec.34, T.16 S., R.2 W., San Diego County, CA, Hydrologic Unit 18070304,
REVISIONS HISTORY - Discrete water-level readings for NAVD88 and NGVD29 values were updated due to an incorrect offset that was originally applied. The changes were made to the values from the start of the record through May 18, 2021.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 1,100 ft. Upper casing diameter 2.90 in; top of first opening 920 ft, bottom of last opening 1,060 ft.
DATUM - Land-surface datum is 345.74 ft above North American Vertical Datum of 1988. Measuring point: Black mark top of 3 inch pvc casing below lsd, 0.25 ft below land-surface datum, Jun. 8, 2011 to present; Even level with top of vault directly over casing above lsd, 0.5 ft above land-surface datum, Jun. 8, 2011 to May. 6, 2020. Prior to 04/02/2024, the Land-Surface Datum (LSD) was 345.84 ft above the North American Vertical Datum of 1988. Due to new Level 2 GNSS survey, the new Datum value is 345.74 ft above the North American Vertical Datum of 1988.
PERIOD OF RECORD - Water year 2011 to current year.
GAGE - Electronic data logger and pressure sensor.
REMARKS - Records rated good. Sudden water-level changes may be attributed to nearby anthropogenic effects such as pumping and sampling. Chollas Park Cluster Wells consist of six continuous record groundwater wells, located in a common ground-level vault.
PERIOD OF DAILY RECORD - October 2011 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest daily maximum water level recorded, 118.81ft NAVD 88, Oct. 02, 2024; lowest daily minimum water level recorded, 107.04 ft NAVD 88, Oct. 27, 2011.
