Patent ID: 8876491

Claim:
A submersible pump assembly comprising: at least one pump; wherein said pump has a first end for water inlet; and wherein said pump has a second end for water outlet; at least one structural filter assembly having a first end and a second end corresponding to said first end and said second end of said pump wherein said structural filter assembly is in fluid communication with said pump; an upper ballast tank secured to and above said structural filter assembly; at least two lower ballast tanks located below said upper ballast tank, wherein said lower ballast tanks each have at least one remotely controlled upper valve; at least one compressed air line, wherein said compressed air line provides gaseous communication between said lower ballast tanks and a compressed air source; a valve control mechanism suitable for opening and closing at least one upper valve thereby controlling the buoyancy of said submersible pump assembly; a pressure relief system for said submersible pump assembly; and an automated low-level, low-flow sensor with an automated shutdown, wherein said automated shutdown terminates said pump operations in response to a low water level or low water flow condition.