Water Trough Management (Weir, Limestone, Fremont) Volunteers will be filling water troughs at some North Ranch Staging Areas. Activity Details Date: Friday, March 13, 2015 Time: 9:00 am - 3:00 pm Duration (hours:minutes): 6:00 Type: Hiking & Fitness Organization: Irvine Ranch Conservancy Area: Irvine Ranch Conservancy Staging Area: IRC Office-Conference Room Difficulty: 1 Minimum Age: 18 Email Activity to Friend Registration is closed for this activity..