why doesnt the club buy a cheapish cellar pump,they are only £29 and will pump about 2000 gallons an hour right down to a couple mm off the floor,if you have a genny you are sorted,you already have lots of hosing you can use to pump it into the beck,should clear it in an hour or so.
£29,£33 delivered
http://cgi.ebay.co.uk/WATER-PUMP-PUM...QQcmdZViewItem