Section 20.03.05.015 - CASUAL EXPLORATION01.Lands Open. All beds of navigable waterways that have not been located, leased or withdrawn in accordance with statute or the terms of these rules, are free and open to casual exploration on a nonexclusive and first come basis.02.Equipment Limitations. Mining equipment for casual exploration that may occur prior to the filing of a location or lease application is limited to suction dredges with a five (5") inch intake or less and powered equipment rated at fifteen (15) HP or less, or non-powered sluice equipment.03.No Approval for Casual Exploration Required. No written approval is required from the Director for casual exploration.04.Department of Water Resources Permits. Casual exploration requires a valid Stream Channel Alteration Permit issued by the Idaho Department of Water Resources.05.Lake Encroachment Permits. An encroachment permit pursuant to Title 58, Chapter 13, Idaho Code is required prior to any mineral exploration or extraction in a navigable lake.06.Department of Environmental Quality Permits. Suction dredging requires a valid general or individual permit issued under the Idaho Pollutant Discharge Elimination System.Idaho Admin. Code r. 20.03.05.015