[Tagging] Feature Proposal - RFC - sluice_gate

[John Smith]

On 5 January 2011 15:16, Steve Bennett <stevagewp at gmail.com> wrote:
> waterway=dam (a wall with water on one side)
> waterway=weir (a wall with water flowing over the top)
> waterway=flow_control (an opening through which water sometimes flows).
> flow_control=sluice_gate|flood_gate|spillway_gate|lock_gate...

Ummm, both dams and weirs are also methods of flow control, I'd move
them both to be subtags similar to what you suggested.