Advantages over submersibles or self-priming pumps:

1) Vertical spindle pumps on floating barges require minimum maintenance and maximize intervals between maintenance on account of they being powered electrically and not diesel driven in the case of self-priming pumps and due to the robust design of the vertical spindle pumps with cantilever shafts and oversized bearings and no mechanical seal requirement. Resulting in opex savings.

2) The pumps spindle depth (NPSHA) remains constant as the pit water level rises and falls in flash flooding occurrences. No need to prime the pumps.

3) Pumps continue to operate even in flash flooding scenarios translating into a safer work environment because crews are not required to move pumps to higher ground.

 4) As much as 30% more cost effective from a capital expenditure point of view. 

5) Simple run dry water seal arrangement, eliminating expensive mechanical seals.

6) Eliminating the replacement costs and maintenance expenses of a diesel engine.

9) Cost saving by eliminating diesel refueling in the pit.

10) Diesel Refueling in the pit in flash flooding conditions could contribute to a safety hazard.