Glossary
NAVD 88
NAVD 88 (National Geodetic Vertical Datum of 1988) is the orthometric-height system behind much modern US mapping and surveying. Stage reported "feet NAVD 88" is measured relative to that national surface—not to NGVD 29 unless a source converts explicitly.
Related lake intelligence
Lake Travis
/lakes/travis
Lake Travis catalogs elevation reference MSL—compare only to readings using the same labels.
Related lake intelligence
Lake Sam Rayburn
/lakes/samrayburn
Lake Sam Rayburn catalogs elevation reference MSL—compare only to readings using the same labels.
Related lake intelligence
Lake Seminole
/lakes/seminole

