San Diego Hydrogeology
Site Description for Sweetwater - SDSW (17S/2W-28R4-9)
STATION NUMBER: 323932117050801–5 017S002W28R004–9S Agency: USGS
LOCATION: Latitude 32°39'32.53", Long 117°05'08.08" referenced to North American Datum of 1983, in NW 1/4 SW 1/4 SW 1/4 sec.28, T.17 S., R.2 W., San Diego County, CA, Hydrologic Unit is 1807030410
WATER-LEVEL RECORD: The period of record for intermittent and daily water-level measurements is listed below.
| State well number | USGS station number | Intermittent Water-level | Daily water-level |
|---|---|---|---|
|
17S/2W-28R4 17S/2W-28R5 17S/2W-28R6 17S/2W-28R7 17S/2W-28R8 |
323932117050801 323932117050802 323932117050803 323932117050804 323932117050805 |
12/22/2009 to present 12/15/2009 to present 9/11/2010 to present 9/11/2010 to present 12/24/2009 to present |
12/24/2009 to present 12/05/2009 to present 10/15/2010 to present 10/15/2010 to present 10/15/2010 to present |
COOPERATION: Sweetwater Authority
WELL CHARACTERISTICS:
The USGS well site is located within 500 ft of three Reynolds Desalination Facility production wells (SDF6, SDF1, SDF2). Water levels in all six observation wells may be affected by pumping and injection. USGS observation wells #1 and #2 (deepest wells) are least affected. USGS well #3 is in a fine-grained unit and may respond to pumping and injection. USGS well #4 is perforated in a production zone. USGS wells #5 and #6 are affected by surface water (estuary). Well #1 is artesian.
Well Id |
Hole depth (ft) |
Well depth (ft) |
Perforation depth (ft) |
Casing size & type |
|---|---|---|---|---|
| 17S/2W- 28R9 28R8 28R7 28R6 28R5 28R4 |
2006 2006 2006 2006 2006 2006 |
65 190 560 980 1320 1990¹ |
45–65 170–190 540–560 960–980 1300–1320 1810–1850 |
2" PVC 2" PVC 2" PVC 2" PVC 2" PVC 3" PVC |
| ¹ Note: Sump | ||||
ROAD LOG: Key intersection is the intersection of Interstate Highway 5 and Highway Route 94 about near downtown San Diego. Directions are given from Interstate Highway 5 south towards National City.
| Mileage | Description |
|---|---|
| 5.3 | Take Interstate Highway 5 south to Highway 54 east. |
| 1.2 | Take Highway 54 east to Highland Ave./4th Ave. Turn left onto Highland Ave. |
| 0.4 | Take 1st right onto 30th St. E |
| 0.4 | Take 1st right onto 2nd Ave. |
| 0.1 | Well is located at the Richard A. Reynolds Desalination Facilty at 3066 N 2nd Ave., Chula Vista, CA on the right. The vault is behind the main building, over a bridge and through gate. |
Project Chief: Wes Danskin
Phone: 619-225-6132
Email: wdanskin@usgs.gov
Welcome to the United States Geological Survey (USGS) San Diego Hydrogeology (SDH) project website, which provides geologic and hydrologic information for the transboundary San Diego–Tijuana area, USA and Mexico. This website provides background information about the project; a variety of news items; a large amount of data, in particular for USGS multiple-depth, monitoring-well sites; geologic and hydrologic models; and additional resources including photos, illustrations, and references.
Last updated: July 2023.
Some additional data may be available from the USGS database National Water Information System (NWIS).
Questions about San Diego Hydrogeology? Please contact Wes Danskin (email: wdanskin@usgs.gov or send a letter). 619.225.6132