Glossary
Flood stage
Flood stage is a published threshold where water begins to impact life or property at a specific gauge location—common on rivers and some reservoir tailwaters. It is not the same as a dam's flood pool storage band above recreation full on an impoundment.
Published May 16, 2026 · Editorial standards
Why it matters
Campers watch river gauges for closure thresholds; reservoir users watch how much flood storage is in use before releases increase tailrace flow. Confusing the terms leads to bad comparisons between a USGS river point and a USACE pool guide.
Technical context
Flood stage (NWS/USGS context): impact threshold at a gauge.
Flood pool (USACE context): authorized storage above recreation full to attenuate floods.
On real lakes
Related lake intelligence
Lake Okeechobee
/lakes/okeechobee
Check Lake Okeechobee for how pool storage and downstream gauges relate—flood-stage on a river gauge is not the same as flood pool on the reservoir. Published levels use NGVD29 relative to MSL unless the lake page notes otherwise.
Related lake intelligence
Cross Lake
/lakes/cross-lake
Check Cross Lake for how pool storage and downstream gauges relate—flood-stage on a river gauge is not the same as flood pool on the reservoir. Published levels use NGVD29 relative to MSL unless the lake page notes otherwise.
Related lake intelligence
Stockton Lake
/lakes/stockton-mo
Check Stockton Lake for how pool storage and downstream gauges relate—flood-stage on a river gauge is not the same as flood pool on the reservoir. Published levels use NGVD29 relative to MSL unless the lake page notes otherwise.
Reference information only. See data sources, editorial standards, or suggest a correction.