The eastern boundary of the Louisiana purchase was the Mississippi River, from its source to the 31st parallel, though the source of the Mississippi was, at the time, unknown. The eastern boundary below the 31st parallel was unclear.
An A-frame pool ladder is a great above ground pool ladder designed for stability and safety that is perfect for above ground swimming pools Pool owners with small children can provide an extra layer of safety with the fold up mechanism or locking gate.
If you have a slide (push-pull) valve, backwash the filter to lower the water level. Some pools have a hose spigot plumbed after the pump, or on the filter valve, which you can connect a garden hose, to lower water level. Or, you can use a submersible pump, aka pool cover pump, to keep the pool from overflowing. Finally, there is the siphon method. A pool vacuum hose works best.