Watermark.
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Switch site 38 sites · 11 basins 8 open

Each site is one Watermark investigation. The page color says what opens; the campus line is the build on the ground — two different clocks.

MAU Maumee Basin 9 sites
2MI The Two Miamis 9 sites
SE Southeastern Basins 12 sites
NE Northeast Basins 8 sites
The page — what opens on Watermark Open · Draftfull record Queued · Watchingpreview page Restrictedrequest access
The campus — the build on the ground Investigating Confirmed Under construction Operational
All 38 sites — the network index →

Hydrology

Streamflow, precipitation and aquifer draw, read against the site's water ask.

Data sources USGS NWISNOAA Atlas-14NASA POWER

Gauge before model

Every hydrograph starts from an observed USGS gauge. Where no gauge sits nearby, a modeled estimate is shown and labeled, never blended in as if it were measured.

The demand-pressure band

A site's stated water ask is placed against the local flow-duration curve so a reader can see, at a glance, what share of low flow the ask represents — screened against 7Q10 low flow, not an average.

Aquifer draw is regional

Groundwater withdrawal is read at the basin scale, since a single well permit rarely shows the cumulative draw of a full build-out.

A cooling-water request read from the discharge permit is [verified] ; the low flow it's screened against, modeled where no gauge sits nearby, is [inference] .

Guardrail

The demand-pressure band is a stylized screen, never a forecast.