Downtime for water pump maintenance
I am an investor. Financial forecasts in a proposal I am considering rest on a "100 horsepower pump capable of diverting 780 gallons per minute at 290 feet of head" running continuously at 96% of its rated capacity: 24 hours per day, 365 days a year. I am not an engineer but that looks questionable to me. I would have thought it likely that some downtime would be necessary for maintenance during the course of a year.
Is my layman's view wrong? Can all routine maintenance that might need to be done be done while the pump continues to run?
If not, what sort of downtime might be expected? Just a ball-park figure. 1 percent? 5 percent?
Any guidance would be gratefully received.