PLA Impounding Culvert
Introduction
The photograph on this page of PLA Impounding Culvert by Robin Webster as part of the Geograph project.
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Image: © Robin Webster Taken: 5 Mar 2011
This seems to be the intake or outfall (?) for controlling water level in the Royal Docks. The signs are by the Environment Agency but the port authority is of course the Port of London Authority, so who operates this?