Glossary
USGS
USGS logoThe U.S. Geological Survey (USGS) collects and publishes inland water observations—streamgages, lake levels, and related datasets—that feed many third-party lake apps and research products.
Published May 16, 2026 · Editorial standards
Why it matters on the water
When you check a creek inflow gauge or compare a tailwater reading to a reservoir stage, you are often looking at USGS infrastructure or USGS-curated time series. USGS emphasizes consistent metadata—location, datum, and measurement type—so a stage reading can be traced back to a real sensor.
On managed reservoirs, USGS may operate companion gages upstream or downstream even when the pool guide comes from USACE or a utility.
What USGS typically publishes
| Product | Lake Insights context |
|---|---|
| Streamgages | Stage and discharge on rivers feeding or leaving reservoirs |
| Lake monitoring | Selected natural and managed lakes with public gage networks |
| WaterAlert / APIs | Automated feeds partners map into dashboards |
On real lakes
Related lake intelligence
Lake Murray
/lakes/murraysc
Explore Lake Murray for live levels, pool context, and lake intelligence on Lake Insights. Published levels use MSL unless the lake page notes otherwise.
Related lake intelligence
Cedar Creek Reservoir
/lakes/cedar-creek-tx
Explore Cedar Creek Reservoir for live levels, pool context, and lake intelligence on Lake Insights. Published levels use NGVD29 relative to MSL unless the lake page notes otherwise.
Related lake intelligence
Siltcoos Lake
/lakes/siltcoos-lake
Explore Siltcoos Lake for live levels, pool context, and lake intelligence on Lake Insights. Published levels use MSL unless the lake page notes otherwise.
- Is USGS the same as USACE for lake levels?
No. USACE publishes operating pools and many project gages; USGS often runs hydrologic gages on connected rivers. Both can appear on one lake page through different data paths.
- How does Lake Insights use USGS?
Where a lake’s catalog or live feed includes USGS endpoints, stage and metadata flow into the lake’s level chart and source attribution. Availability varies by lake.
Reference information only. See data sources, editorial standards, or suggest a correction.