San Diego Hydrogeology
Mile of Cars - SDMC (17S/2W-33D1-5)
Lithologic Summary
Land-surface elevation is 23.04 feet above NAVD88. Depth is in feet below land surface. Drilled by U.S. Geological Survey using hydraulic rotary, June 26, 2005. Total depth drilled 1502 feet. Screened intervals: 1440-1480, 1100-1120, 700-720, 260-280, and 35-75 feet.
| Depth (ft) | Description | |
|---|---|---|
| From | To | |
| 0 | 80 | Sand (S), M to VC sand, high mica %, burnt wood |
| 80 | 150 | Slightly sandy silty clay (M), Clay & silt with some M to C sand |
| 150 | 180 | Gravelly sand (GS), F to VC sand w/ grnls & pbls < 6mm dia. |
| 180 | 200 | Sandy Silty Clay (M), Clay & silt w/ VF to M sand |
| 200 | 220 | Sand (S), C to VC sand |
| 220 | 230 | Sandy Silty Clay (M), Clay & silt w/ VF to M sand |
| 230 | 240 | Sand (S), M to VC sand, high mica % |
| 240 | 250 | Sandy silty clay (sM), Clay & silt w/ VF to M sand |
| 250 | 280 | Slightly gravelly sand ((g)S), M to VC sand w/ grnls & pbls < 8mm dia. |
| 280 | 300 | Sandy clayey silt (sM), Silt & Clay w/ VF to M sand |
| 300 | 330 | Sand (S), C to VC sand |
| 330 | 350 | Clayey silty sand (mS), M to C sand w/ silt and clay |
| 350 | 470 | Sand (S), C to VC sand |
| 470 | 490 | Sandy clayey silt (sM), Silt & clay w/ VF to VC sand |
| 490 | 560 | Sand (S), C to VC sand |
| 560 | 600 | Sandy silty clay (sM), Clay & silt w/ VF to VC sand |
| 600 | 760 | Slightly gravelly sand ((g)S), M-VC sand w/ grnls & shells |
| 760 | 770 | Silty sand (zS), M to VC sand and silt |
| 770 | 800 | Sand (S), C to VC sand |
| 800 | 810 | Silty sand (zS), M to VC sand and some silt |
| 810 | 870 | Sand (S), F to C sand |
| 870 | 960 | Silty sand (zS), F to C sand w/ silt & clay , shells |
| 960 | 980 | Clay ( C), clay |
| 980 | 1050 | Silty clayey sand (mS), F to C sand w/ silt & clay, shells |
| 1050 | 1070 | Clay ( C), clay |
| 1070 | 1220 | Sand (S), F to C sand |
| 1220 | 1280 | Sandy clay (sC), Clay w/ F to M sand |
| 1280 | 1320 | Clayey sand (cS), F to C sand w/ clay |
| 1320 | 1500 | Sandy clayey silt (sM), Clay & Silt w/ shale, shell frag, F to C sand |
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