San Diego Hydrogeology
El Toyon Park - SDEP (17S/2W-16Q9-13)
Lithologic Summary
Land-surface elevation is 109.21 feet above NAVD88. Depth is in feet below land surface. Drilled by U.S. Geological Survey using hydraulic rotary, June 23, 2003. Total depth drilled 1308 feet. Screened intervals: 1260-1300, 920-960, 740-760, 410-430, and 150-170 feet.
Depth (ft) | Description | |
---|---|---|
From | To | |
0 | 60 | Slightly gravelly sandy silty clay; dark yellowish brown |
60 | 150 | Gravelly silty sand; dark yellowish brown |
150 | 220 | Slightly gravelly sandy clayey silt; dark yellowish brown |
220 | 300 | Gravelly silty sand; dark yellowish brown |
300 | 430 | Gravelly silty sand; light olive brown |
430 | 470 | Slightly gravelly sandy silty clay; olive brown |
470 | 598 | Gravelly silty sand; light olive brown |
598 | 648 | Slightly gravelly sandy silty clay; olive brown |
648 | 760 | Sandy clayey silt; dark olive gray |
760 | 780 | Silty sand; dark olive gray |
780 | 830 | Sandy clayey silt w/ shell fragments; dark olive gray |
830 | 890 | Sandy silt; dark greenish gray |
890 | 940 | Clayey silt w/ shell fragements; very dark greenish gray |
940 | 1090 | Clayey silt; very dark greenish gray |
1090 | 1130 | Sandy silt; olive gray |
1130 | 1160 | Sandy clayey silt; olive gray |
1160 | 1200 | Gravelly sand; olive gray |
1200 | 1220 | Gravelly silty clayey sand; olive gray |
1220 | 1240 | Sandy silty clay; olive gray |
1240 | 1260 | Gravelly silty clayey sand; olive gray |
1260 | 1290 | Slightly gravelly sandy silty clay; olive gray |
1290 | 1320 | Gravelly sand; olive gray |
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