Watermark.
Sidney
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 →
Live

How the record was assembled — and withheld

6 events, cause → consequence — each traceable to the extraction that supplied it, the evidence node colored by its citation. Every beat carries its standing: verified events are sourced; open events mark where the record is still being fought for. The order is the argument: the confidentiality went on before the public ever heard the name.

2022
2022-11-07 npdes public notice [verified]
NPDES 1PD00009*SD (City of Sidney WWTP) — public notice
action renewal; receiving Great Miami River at River Mile 128.68
2025
2025-12-10 epa permit action [verified]
401 Water Quality Certification and Isolated Wetland Permitting Unit DSW401251911W (Ohio EPA ID No. 251911W); Application ID: 461193445 — application (CMH-232)
affected 0.24 ac of one forested Category 2 isolated wetland and 0.18 ac of two non-forested wetlands; HUC-12 050800010703 (Brush Creek-Great Miami River) and 050800010604 (Mill Creek-Loramie Creek); USACE Huntington District
2026
2026-03-09 site plan [verified]
Civil — public sanitary sewer relocation (plan, profile and demolition) (Permit) — Public Sanitary Sewer Relocation Plan
2026-05-06 epa permit action [verified]
401 Water Quality Certification / Isolated Wetland Permit DSW401252256W (Ohio EPA ID No. 252256W) — correspondence — mitigation purchase complete (West Millcreek Road/Fair Road Development)
affected isolated wetlands within the West Millcreek Road/Fair Road right-of-way improvements
2026-06-16 epa permit action [verified]
Surface Water Permit to Install (long term) DSWPTI-260517 — permit to install issued (SIDNEY DATA CENTER CAMPUS — Public Sanitary Sewer Relocation, 2388 West Millcreek Rd)
affected public sanitary sewer relocation (internal reference DSW-7167)
2026-08-04 epa permit action [verified]
Permit-to-Install / Permit-to-Install and Operate (PTI/PTIO), air pollution sources P0141118 — application (CMH232 Campus)