Add up to 2 more sites and replot for "Lake or reservoir water surface elevation above NGVD 1929, feet"
Add up to 2 more sites and replot for "Lake or reservoir water surface elevation above NGVD 1929, feet, Gatehouse"
Add up to 2 more sites and replot for "Lake or reservoir water surface elevation above NAVD 1988, feet"
Add up to 2 more sites and replot for "Lake or reservoir water surface elevation above NAVD 1988, feet, Gatehouse"