Lower Warragamba before floods, locals say

Warragamba Dam provides Sydney's drinking water and could limit its supply if partially drained. (Dan Himbrechts/AAP PHOTOS) (AAP)

Local residents are pushing for Sydney's Warragamba Dam to be partially drained ahead of flood events, instead of its wall being raised under a mitigation proposal by the NSW government.

Warragamba provides Sydney's drinking water, the supply of which could be limited if the dam level is lowered.