Tours are by reservation only and must be made at least one month in advance of the requested date. Requested dates and times must be verified by Platte River personnel before the tour date is set. Tours can be scheduled Monday-Thursday, 9:00 a.m.-2:00 p.m. The required minimum number of participants is 5; maximum is 30. Age minimum is 8 years or 3rd grade. Tours take about 90 minutes. Please arrive at least 15 minutes early to be checked in through plant security.