Watermark.
All sites
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 →
The Watermark network

Every site on the record.

The network is 38 watershed points across 11 basins in 2 states. 8 open to read today; the other 30 are registered and tracked, and each one has a page saying what we have and what we're still missing. Nothing here is a verdict.

Open now — 8 of 38 sites you can read today.
Mapped — where the 38 are. Filter the map by basin, drainage, or build phase.
Basin
Drains to
Build phase
Every Watermark site, mapped — 38 of 38 sites placed, 8 open to read. Lima — Ottawa River · Lima, OH, building, open to read BOSC Fort Wayne — Maumee headwaters, live, open to read GCP Urbana — Mad River · Great Miami, live, open to read URB Defiance — Maumee mainstem, queued DEF Findlay — Blanchard River, live, open to read FIN Toledo — Lucas Co WRRF, queued TOL Bowling Green · Middleton Twp — Portage · Maumee divide, live, open to read BGN Van Wert — Town Creek · Little Auglaize, live, open to read VWT Bryan — Prairie Creek · Tiffin River, queued BRY Ottawa — Blanchard River (lower), queued OTW Springfield — Mad River · Great Miami, queued SPR Xenia — Little Miami, queued XEN Dayton · WPAFB — Mad River · Great Miami, queued WPA Hamilton · Middletown — Great Miami (lower), queued HAM Troy · Piqua — Great Miami (upper), live, open to read TRP Sidney — Great Miami · headwaters, live, open to read SID Greenville · Darke Co — Stillwater · basin divide, queued GRV Wilmington — Todd Fork · Little Miami, queued WIL West Union · Adams Co — Ohio Brush Creek · Ohio River, queued WUN New Albany · Licking — Scioto ↔ Muskingum divide, tracked NAL Columbus — Scioto · Olentangy, tracked COL Coshocton — Tuscarawas + Walhonding, tracked CSH Piketon — Scioto River · PORTS, tracked PIK Sandusky · Perkins Twp — Sandusky Bay · Lake Erie, tracked SAN Mansfield — Rocky Fork Mohican · Muskingum, tracked MFD Portsmouth · Green Twp — Ohio River · lower Scioto, tracked PSM Newark — Licking River, tracked NWK Zanesville — Muskingum mainstem, tracked ZAN Fremont · Clyde — Lower Sandusky, tracked FRE Tiffin — Sandusky (mid), tracked TIF Bucyrus — Sandusky headwaters, tracked BUC Cleveland — Lower Cuyahoga, tracked CLE Akron — Upper Cuyahoga · CVNP, tracked AKR Lordstown · Warren — Upper Mahoning, tracked LRD Youngstown — Mahoning mainstem, tracked YNG Lancaster — Upper Hocking, tracked LAN Athens — Lower Hocking, tracked ATH Logan — Hocking Hills, tracked LOG

38 of 38 sites placed, 8 open to read. Marker positions are each site's real coordinates; the state outline and the continental divide are simplified, not to scale.

A marker is the watershed point — the place the record is filed against. It is not a facility, a parcel, or a plant, and most of these sites have no located facility on the record at all.

The index — all 38, filterable and sortable.
Access Whether the site's build opens today.
State The law its records live under.
Basin The major river basin it documents.
Record assembled How much record this site's own export has assembled.
Build phase Our progress assembling the website.
Facility The plant in the ground — a separate clock.
Sort

Filters combine: a site shows only if it matches every selection. Some combinations have no site yet — Clear filters resets the view.

BOSC Lima Allen County, OH Maumee Ottawa River · Lima, OH Building Reference Under construction 3,382 160 Open → GCP Fort Wayne Allen County, IN Maumee Maumee headwaters Live Reference Live 10 3 Open → URB Urbana Champaign County, OH Great Miami Mad River · Great Miami Live Case Confirmed 32 4 Open → DEF Defiance Defiance County, OH Maumee Maumee mainstem Queued Watch › FIN Findlay Hancock County, OH Maumee Blanchard River Live Reference Live 175 15 Open → TOL Toledo Lucas County, OH Maumee Lucas Co WRRF Queued Watch › BGN Bowling Green · Middleton Twp Wood County, OH Portage Portage · Maumee divide Live Case Confirmed 24 15 Open → VWT Van Wert Van Wert County, OH Maumee Town Creek · Little Auglaize Live Case Confirmed 25 10 Open → BRY Bryan Williams County, OH Maumee Prairie Creek · Tiffin River Queued Watch › OTW Ottawa Putnam County, OH Maumee Blanchard River (lower) Queued Watch › SPR Springfield Clark County, OH Great Miami Mad River · Great Miami Queued Watch › XEN Xenia Greene County, OH Little Miami Little Miami Queued Watch › WPA Dayton · WPAFB Montgomery County, OH Great Miami Mad River · Great Miami Queued Watch › HAM Hamilton · Middletown Butler County, OH Great Miami Great Miami (lower) Queued Watch › TRP Troy · Piqua Miami County, OH Great Miami Great Miami (upper) Live Case Confirmed 2 3 Open → SID Sidney Shelby County, OH Great Miami Great Miami · headwaters Live Case Under construction 54 28 Open → GRV Greenville · Darke Co Darke County, OH Great Miami Stillwater · basin divide Queued Watch › WIL Wilmington Clinton County, OH Little Miami Todd Fork · Little Miami Queued Watch › WUN West Union · Adams Co Adams County, OH Ohio Brush Creek Ohio Brush Creek · Ohio River Queued Watch › NAL New Albany · Licking Licking County, OH Scioto Scioto ↔ Muskingum divide Tracking Watch › COL Columbus Franklin County, OH Scioto Scioto · Olentangy Tracking Watch › CSH Coshocton Coshocton County, OH Muskingum Tuscarawas + Walhonding Tracking Watch › PIK Piketon Pike County, OH Scioto Scioto River · PORTS Tracking Watch › SAN Sandusky · Perkins Twp Erie County, OH Sandusky Sandusky Bay · Lake Erie Tracking Watch › MFD Mansfield Richland County Muskingum Rocky Fork Mohican · Muskingum Tracking Watch › PSM Portsmouth · Green Twp Scioto County, OH Scioto Ohio River · lower Scioto Tracking Watch › NWK Newark Ohio Muskingum Licking River Tracking Watch › ZAN Zanesville Ohio Muskingum Muskingum mainstem Tracking Watch › FRE Fremont · Clyde Ohio Sandusky Lower Sandusky Tracking Watch › TIF Tiffin Ohio Sandusky Sandusky (mid) Tracking Watch › BUC Bucyrus Ohio Sandusky Sandusky headwaters Tracking Watch › CLE Cleveland Ohio Cuyahoga Lower Cuyahoga Tracking Watch › AKR Akron Ohio Cuyahoga Upper Cuyahoga · CVNP Tracking Watch › LRD Lordstown · Warren Ohio Mahoning Upper Mahoning Tracking Watch › YNG Youngstown Ohio Mahoning Mahoning mainstem Tracking Watch › LAN Lancaster Ohio Hocking Upper Hocking Tracking Watch › ATH Athens Ohio Hocking Lower Hocking Tracking Watch › LOG Logan Ohio Hocking Hocking Hills Tracking Watch ›

Three clocks, and they move independently. Build phase is our progress assembling the website. Record is how much of the record that site's own export has assembled — a standing property recomputed at every export, so it rises when a source lands and falls when one dries up. Facility is the plant in the ground. A queued site can document a live facility, and a built site can document one still under investigation. A dash means no committed bundle has measured that figure yet — it is not a zero, and it is not a finding.