Hi indigomc, thanks for pointing out the issue about the multipolygon relation. I agree that it should be retained as one entity rather than broken up, I’ve reverted this change in changeset/64910649. Originally I was mapping to the updated imagery but as you’ve pointed out it doesn’t always show the maximum water level. I’ve realigned this area to the median of the maximum (but not the flood level) using Bing imagery and the guidelines given on the riverbank OSM page under “Varying water level river.”

waterway=riverbank