Tuesday, October 19, 2010
Water Table Primer
"The third groundwater system is the regional water table that is encountered at the base of the Crystal mine. The water elevation in the bottom of the Crystal mine varies seasonally but it has reached an elevation of approximately 475 ft (145 meters) above sea level in the mine or about 800 ft (244 meters) below the surface of the Crystal portal.
"Groundwater flow in the regional water table is likely most significant in the permeable contact zone between the granitic intrusion and the carbonate rocks. Surface water flows appear to have large losses to the subsurface at this contact zone. Based on topography, the regional water table should discharge to the major river valley streams to the west, east and south."
Thomas G Krzewinski, PE, Sr. Geotechnical Engineering
Jan F. Deick, Sr. Project Hydrogeologist
Bob Dugan, Office Manager
Steve Anderson, P.E., Senior Project Engineer