To find the elevation at the bottom of Lake Sargondo, we need to determine its depth relative to sea level. Given that Lake Sargondo is 5.5 feet deep, we treat this as a depth below sea level.
- Lake Sargondo depth: 5.5 ft
Since the depth below sea level is considered negative in elevation terms, the elevation at the bottom of Lake Sargondo would be:
\[ \text{Elevation} = -\text{Depth} \] \[ \text{Elevation} = -5.5 \text{ ft} \]
Therefore, the elevation at the bottom of Lake Sargondo is -5.5 feet, indicating it is 5.5 feet below sea level.