DEP proposes to certify that the restart of the facility, operation and maintenance at the facility does comply with the federal Clean Water Act.
Impacts to aquatic resources associated with resumed operation of the facility include water withdrawal from the Susquehanna River, consumptive use and the thermal impacts of the heated water discharges back to the Susquehanna River which has a designated use of Warm Water Fishes, Migratory Fishes.
Water is proposed to be withdrawn at an amount up to 73.200 million gallons per day (MGD) (peak day) from the Susquehanna River, with a proposed consumptive use of up to 21.000 MGD.
Impingement and entrainment effects on the migratory and resident fish as well as other aquatic species are anticipated to be minimized through the facilities continued operation and use of closed cycle cooling technologies.
Discharge temperatures will be a maximum of 110°F. Additionally, operation, maintenance, repair and replacement of existing water obstructions and encroachments, such as existing bridges at the site, will continue to occur as necessary.
Constellation Energy must obtain these permits for the facility--
-- NPDES Wastewater Discharge Permit
-- Chapter 102 Erosion and Sedimentation Control Permit
-- Develop a Chapter 102 Erosion and Sedimentation Control Plan
-- Obtain Chapter 105 Water Obstruction & Encroachment Permits
-- Submit a Plan For Water Intake Impingement, Entraining Monitoring
-- Must Mitigate Consumptive Use of Water as required by the Susquehanna River Basin Commission
-- Conduct additional Water Quality Monitoring as required by DEP
Copy Of Certification
A copy of the Water Quality Certification will be posted on the DEP Southcentral Regional Office "Craine Clean Energy Center' webpage or contact the DEP Southcentral Regional Office file room at 717-705-4732 to schedule a review of the file.
Public Comments
No hearing has been scheduled on the certification, but one may be requested.
DEP will accept comments on the certification one June 9-- 30 days after this notice.
Comments should be sent to the DEP Southcentral Regional Office, Waterways and Wetlands Program Manager, 909 Elmerton Ave., Harrisburg, PA 17110 or to RA-EPWW-SCRO@pa.gov.
Read the entire PA Bulletin notice for more information.
For more information on environmental programs in Pennsylvania, visit DEP’s website. Submit Environmental Complaints; Click Here to sign up for DEP’s newsletter; sign up for DEP’s eNotice; Like DEP on Facebook, Follow DEP on Twitter and visit DEP’s YouTube Channel.
Related Articles This Week:
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-- Pottstown Mercury: Details Emerge About Threats Related To Proposed Twp. Limerick A.I. Data Center Project In Montgomery County; Some Threats Read At Tuesday Meeting https://tinyurl.com/mr4yxm7s [PDF of Article]
-- PA Capital-Star: PJM Grid Manager Says Developers Are Proposing 220 GW Of New Power Projects [Decisions On Which Go Ahead Will Not Be Made Until Feb. 2028, Then They Have To Be Financed, Sited, Built]
-- Utility Dive: PA House Unanimously Passes Bill To Require Utilities To Incorporate Review Of Advanced Transmission Technology In Transmission Line Proposals
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-- Utility Dive: American Electric Power Eyes Exit From PJM, SPP Over Slow Connection Of New Generation In Face Of A.I. Data Center Demand [AEP operates in Indiana, Kentucky, Michigan, Ohio, Virginia, WV In PJM]
[Posted: May 8, 2026] PA Environment Digest
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