Glossary
NGVD 29
NGVD 29 (National Geodetic Vertical Datum of 1929) is the older national vertical datum still printed on many USACE pool schedules, legacy gauge histories, and southeastern reservoir guides. Treat any NGVD-labeled elevation as valid only in that reference frame.
Published May 16, 2026 · Editorial standards
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Lake Russell
/lakes/russell
Lake Russell catalogs elevation reference MSL—compare only to readings using the same labels.
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Norfork Lake
/lakes/norfork
Norfork Lake catalogs elevation reference MSL—compare only to readings using the same labels.
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Tappan Lake
/lakes/tappan
Tappan Lake catalogs elevation reference MSL—compare only to readings using the same labels.
Reference information only. See data sources, editorial standards, or suggest a correction.

