| Site type: Well; depth=315 ft |
| Station identifier: CH-10B (Corehole 10B) |
| USGS station number: 373930118491602 |
| Latitude: 37°39'30" (NAD27) |
| Longitude: 118°49'16" (NAD27) |
| Altitude: 7,079.68 ft above sea level (NGVD29) |
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CH-10B is a monitoring site where water level and barometric pressure are monitored using a pressure transducer and barometer, respectively. These data are recorded on a datalogger every 15 minutes, and the data are transmitted via satellite to NWIS, our national database. CH-10B was drilled by the USGS in 1983 to investigate the hydrothermal system in the southeast moat of Long Valley Caldera. The well is 315 ft deep, and is open to the rhyolite flows and welded tuff formations below 190 ft (schematic diagram of construction). Since 1987, well CH-10B also has been used to monitor pressure changes in the thermal aquifer that could result from pumping geothermal fluid for power production at Casa Diablo and from crustal unrest. | |
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CH-10B on Maps
with all monitoring sites on the Hydrologic Studies Homepage (CH-10B is not labeled)
Plots and Data from CH-10B
Hydrograph of last 15 days (shown with barometric pressure)
Hydrograph for the period of record
Temperature Logs (12 since 1988)
