Sedges Creek
Sedges Creek is an ephemeral stream in Louisa County, Virginia, flowing into Lake Anna, which Amazon has proposed as the receiving water body for up to 280,000 gallons per day of cooling-water discharge.
Last refreshed: 2 June 2026 · Appears in 1 active topic
Timeline for Sedges Creek
Amazon discharge nears Lake Anna vote
Data Centres: Boom and Backlash- Where is Sedges Creek in Virginia?
- Sedges Creek is an ephemeral stream in Louisa County, Virginia, flowing into Lake Anna. It is the proposed receiving water body for Amazon's cooling-water discharge from a 150-acre data-centre campus adjacent to Dominion Energy's North Anna nuclear plant.Source: Virginia DEQ / phase2 analysis
- Why does it matter that Sedges Creek is ephemeral?
- An ephemeral stream runs only after rainfall and offers FAR less dilution capacity than a perennial stream. Discharge that would be diluted harmlessly in a year-round waterway can reach Lake Anna at full concentration via an ephemeral channel, making the monitoring and chemistry of the discharge more consequential.Source: phase2 analysis
- How much water does Amazon want to discharge into Sedges Creek?
- Amazon's VPDES permit application proposes discharging up to 280,000 gallons per day of pretreated non-contact cooling water into Sedges Creek. A separate Amazon facility nearby already discharges up to 460,000 gallons per day into Northeast Creek, another Lake Anna tributary.Source: phase2 analysis
Background
Sedges Creek is an ephemeral stream in Louisa County, Virginia, flowing into Lake Anna. As an ephemeral waterway, it carries water only during and immediately after rainfall events, running dry for extended periods in drier seasons. Its low and intermittent flow gives it limited dilution capacity: pollutants or thermally elevated water discharged into an ephemeral stream reach the receiving body — Lake Anna — without the buffering a perennial stream provides.
Sedges Creek became a regulatory focus in 2026 when Amazon applied to Virginia DEQ for a VPDES permit to discharge up to 280,000 gallons a day of non-contact cooling water into the stream from a proposed 150-acre data-centre campus in Louisa County. The pretreated water contains sulphuric acid, sodium hydroxide, and other treatment chemicals at concentrations permitted under the VPDES template. Virginia DEQ scheduled a public hearing on 9 June 2026. The stream's ephemeral character is central to environmental objections: concentration spikes from the discharge that would be diluted harmlessly in a perennial stream can reach Lake Anna intact .
