Dewatering Pumps at Portsmouth Naval Shipyard, Maine

For the P381 pumpwell, pumps are being procured for: main drydock dewatering, drydock drainage, and for auxiliary sea water (ASW). Three main dewatering pumps are provided, and are vertical turbine type pumps sized at 46,700 GPM each, at 26 FT TDH. Pumps are sized such that two pumps will lower the water level in the dry dock in 135 minutes or less as required by UFC 4-2.13-10 (pre-approval) paragraph 7-4.6. Each vertical turbine pump is driven by a 600 HP electric motor.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Cast-in-Place Concrete.
Division 22 -	Plumbing, Plumbing Piping, Plumbing Equipment.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems.
Division 33 -	Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wells.
Division 44 -	Pollution and Waste Control Equipment, Water Pollution Control Equipment.