Geothermal Well Drilling
Catching the Mud and Rock
Drilling a 300-foot well (with a 5-inch diameter hole) produces a lot of mud and rock. Added to this is the water used during the drilling. A silt net is put up to catch and contain the waste. However, the waste builds up fast as you can see from the sequence of photos below.
Some of the silt from drilling. Note the gray color is due to the rock they are drilling through.
Most of the rock brought up from the drilling had the consistency of gravel mixed with silt.