I do not see a reservoir 'Couvre Port Reservoir (site of, now disused') here, Sat image show's a derelict structure of some description??

Based on the 'Name' you have entered and sat imagery you should be using a historic/derelict tag.

Map data/tagging should reflect what is 'on the ground' and current state, Not what was here previously.

Please correct and also review other items you have added here (Roman building, for example, I do not see on sat imagery or 'on the ground' ) 