Section 20.03.05.020 - RIVERBED MINERAL LEASE01.Limitations on Suction Dredges. Operators may not use suction dredges with an intake diameter larger than five inches (5") or attendant power sources rated greater than fifteen (15) horsepower, except under lease.02.Approval Required Before Operations. Prior to entry upon navigable waterways, operators are required to have written approval from the Department.03.Bonding. Approved operations must be bonded as outlined in Subsection 040.01.04.Simultaneous Filings. Two (2) or more lease applications received on the same date and hour, covering the same lands, are considered simultaneous filings. Simultaneous filings will be resolved by competitive bidding.Idaho Admin. Code r. 20.03.05.020