When a reservoir drops well below full pool, boat ramps can end above the waterline, marinas relocate docks, and hazards that are normally submerged become navigation risks.
Recreation agencies publish ramp status against lake elevation, so checking the current level against the ramp's minimum tells you whether launching is even possible.
Levels swing seasonally, so a ramp closed in late summer often reopens after winter refill — watch the trend, not a single reading.
Try it: live lake levels.