52 IGA priorities for maintaining sites
where WildScenicRivers in IGA is equal to or greater than 105 KM (50th percentile)
6 IGA priorities for adding sites
57 HUC12 priorities for adding sites
where absolute value for IGA or HUC12 is equal to or greater than 4.53 KM (2 x mean IGA absolute value)
or IGA contains HUC12s where WildScenicRivers is equal to or greater than 37.6 KM (90th percentile)