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UDC Will Present Wild Trout Thermal Stress Presentation by Dr. Peter Kolesar on Nov. 3

NARROWSBURG – The Upper Delaware Council (UDC) will host a presentation titled “Thermal Stress on the Wild Trout of the Upper Delaware: A Report on the Performance of the FFMP’s Thermal Mitigation Program” by Dr. Peter Kolesar, Professor Emeritus at Columbia University and Special Research Scholar in the Columbia Water Center, on Thursday, November 3, beginning at 7 p.m. at the Upper Delaware Council office, 211 Bridge St., Narrowsburg, NY.

Dr. Kolesar is an avid fly fisher and award-winning photographer who resides in the Town of Highland. He is the author of more than 50 scientific papers in areas of applied mathematics, computer science and engineering.

His research and activism on water policy in the Upper Delaware River was the foundation for the Delaware River Basin Commission’s 2007 implementation of the Flexible Flow Management Program (FFMP) algorithm to manage the water releases from New York City’s dams on the Delaware’s headwaters.

His FFMP design aimed to balance the competing water needs of NYC and down basin users with the desire for flood mitigation in the Delaware Valley – while enhancing the ecology of the upper river to benefit its wild trout. More recently, Kolesar contributed substantially to the design and operations of the Delaware thermal mitigation protocol that has been successfully implemented since 2019.

Kolesar’s research excellence has been recognized by awards from the Institute for Operations Research and Management Science, Theodore Gordon Fly Fishers, the Catskill Fly Fishing Center and Museum, and the Upper Delaware Council.

The UDC monthly meeting to follow will include potential status reports from the Delaware River Basin Commission, New York State Department of Environmental Conservation, Pennsylvania Department of Conservation and Natural Resources, National Park Service, and the UDC Executive Director; discussion of old and new business; and public comment.

All UDC meetings are open to the public. For further information on how to participate via a Zoom option, call (845) 252-3022 or email

Please check or UDC social media pages for any meeting updates.


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