Click a point on the map to assess it: the prorated 90th-percentile threshold, eligibility during the December 1 to March 31 window, the allowable diversion rate, downstream demand, and the winter record.
Gauges: live flow and thresholds thresholds (30-year record) other USGS gauges
Assessments are estimates prorated from the most representative long-record gauge. They are informational and are not a water availability determination.
Every feature of this tool is one component of the answer. As you use a feature, its card lights up with what the step automates, the data it needs, and how readily it could be built beyond this watershed.