original_query: What was the purpose of the Seneca Dam project on the Potomac River?
query: What was the purpose of the Seneca Dam project on the Potomac River?
answer: The Seneca Dam project aimed to provide a water source, control floods, and offer recreational opportunities.  The Corps of Engineers also hoped it would improve water quality by diluting sewage effluent, though this was later deemed unnecessary due to improved sewage treatment.