One of my favorite places to fish this time of year is the sewage treatment plant that treats all the nastiness of Washington DC. The Blue Plains Treatment Facility on the Potomac. They pump out clean but substantially warmer water than the ambient river temps. Walleye, LMB, SMB, stripers among others all pile up in the warmer water to feed. Yet, when the Potomac floods, that seem treatment facility will overflow untreated nastiness into the river. What a mess!