102 IGA priorities for maintaining sites
where IncrTDS in IGA is equal to or greater than 366000 MetricTons/Yr (50th percentile)
177 IGA priorities for adding sites
where absolute value for IGA or HUC12 is equal to or greater than 232000 MetricTons/Yr (2 x mean IGA absolute value)
and 2053 IGA priorities (not plotted, refer to map) without a long-term mean value and upstream of an IGA meeting the criteria