San Diego Hydrogeology


Site Description for Sweetwater - SDSW (17S/2W-28R4-9)

STATION NUMBER: 323932117050801-5 017S002W28R004-9S   Agency: USGS
LOCATION: Lat 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 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: April 2016

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