Anyone interested in preserving what may be down there needs to immediately research "coordination" as it relates to the epa. Coordination was written into the National Environmental Protection Act. It has been court tested. It requires the epa to "coordinate" with local authorities. Authorities can be city gov, sewer district, highway district ... anything with an elected governing body. Coordination puts the governing body on EQUAL status within their jurisdiction with the epa. It works!
Here are two good places to start. http://americanstewards.us/ and http://www.justicemyass.com/.
I am not associated with either group, though I have spoken with people from both groups, and my community has benefited greatly because of help they provided.
Throw a few arrowheads in the canal....That’ll make the world stand still.