After rough grading the pond we were asked to come back and pump out any water that had collected over the summer. Another contractor had to come in and install the last few peices of inlet pipe below the current water level. In this video you will see how we filled the sump hole with water so that no sediment would be pulled in. This was critical as we were pumping directly into a manhole (and thus into a storm drain).  The squeak was the first thing I noticed too.  Were at this game next to Lake Michigan dewatering a borrow pit in sand. 4 cyl diesel powered pump in a borrow pit 24 hrs a day, manned. Monday morning it was over and there was a lake we had dug instead of a borrow pit for a cloverleaf near Muskegon,mi. M-131 highway. We loaded scrapers in water for the rest of the job.  It's 40mm wash rock so the water passes right through it without any trouble, also it's not completely covering the top of the screen filter on the pump. Either way that pump moves a scary amount of water!  you have my dream job lol I love heavy equipment I'm about to start a strip job running a D11 and I'm pump but great videos keep up the good work.