STUDY AUTHORS: Knight Piésold, Water anagement Consultants / Schlumberger Water Services, Frontier Geosciences, Inc., USGS

Pebble’s geotechnical, seismicity and volcanism studies primarily describe volcanic conditions in the Cook Inlet region. Seismicity is covered on a regional basis in Chapter 6. Geotechnical studies focused on gathering information on estuarine deposits in northern Iliamna Bay.


  • There are approximately 100 to 130 feet of unconsolidated sediments overlaying bedrock in Iliamna Bay.