Riverside State Park (Devil’s Toenail) comparing flows: 4,000 cubic feet per second (cfs) on May 9 – and same location 1,000cfs on June 28. At lower flows, the river is not usable by many watercraft.
Water flowing in the Spokane River mostly comes from the Aquifer and Post Falls dam. The Aquifer and the Spokane River are effectively one. Water waste by the 500,000 people who take water from the Aquifer is harming river flows by intercepting water that otherwise would flow to the river. Pump the Aquifer, rob the River. 
Per-capita water use in our communities is some of the highest in the nation: we are a water wasting community. That needs to change if we are going to save the Spokane River. The Upper Columbia River Group of Sierra Club, teaming with CELP and others, is working to protect and restore water flowing in the Spokane River.