While conservation is good and noble, in the case of the water from Eklutna Glacier, as the glacier melts its water flows to the sea whether we put it to some use or not. Since there is limited storage between glacier and sea it will flow as long as the glacier and annual snow fall melt. We can't store it up for future generations.  We are not physically mining the glacier or accellerating the melt beyond its natural rate, nor is our demand exceeding the water produced.  For that we are blessed.  Not washing your car, instigating lawn watering police, or showering with a friend as they do in California and Colorado will not affect the rate the glacier melts!!