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Recreational Water Contact Health Advisory 
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Triadelphia Reservoir  

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Get Current 2.0 Program
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Extended and Enhanced Program Runs from July 1 to October 31

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In 1988, WSSC Water purchased 395 acres in the Avenel area of Montgomery County Maryland for $11 million, 225 acres were conveyed to PGA/TPC at Avenel for $10 for golf course development.  WSSC Water retained 170 acres for a potential future Advanced Wastewater Treatment Plant (AWT) and the golf course acted as a buffer. The property purchased by WSSC Water included equestrian facilities and equestrian activities including a barn, riding trails, a riding ring and paddocks. These facilities were operated as a private equestrian center both prior to and after WSSC Water took ownership.  In May 2023, the hold-over tenancy of the operator of the equestrian center was ended and, subsequently, after finding significant safety issues, the barn was closed.  The barn remains closed and has been fenced off to protect the public and any visitors to the property.  The former operator continues to live on the property under a license agreement and WSSC Water has provided alternative temporary facilities for the care and shelter of her horses.

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Avenel Community Meeting

View the September 16, 2025 Meeting Agenda 

Here you will find documents related to this property and community presentations.  In keeping with our ongoing commitment to transparency and community engagement, this page will continue to be updated as needed with new or revised information.


Request for Information

Presentations

Condition Assessment Report   Executive Summary

Property Agreements

Last Modified: September 12, 2025, 9:04 pm EDT