Due to excessive sediment flowing down Church Creek, the Federation has had to move the sample site downstream several times as sediment fills in the creek and makes the upper reaches shallower and shallower. The original sample site was about 400 yards up the creek above the Wilelinor Marina. It has been moved at least twice because the water became too shallow for the boat during low tide. In 2016, the site was moved from immediately above the marina to its current location off Wilelinor Community pier.