The Army Corps is accepting public comments until February 20.
Want to know where your local Democratic Party office is?
Association of State Democratic Chairs, www.asdc.democrats.org/state-parties
They have a page on the site where if you belong to (or can subvert) a relevant organization, they'll send a trainer. They want six weeks' notice though.
#Knockeverydoor: https://www.knockeverydoor.org, nationwide volunteer canvassing to mobilize communities against Trump
Movement2017, www.movementvote.org collects donations for Resistance groups and local voter organizing groups.
Flippable: http://www.flippable.org focuses on 23 elections and special elections in 2017 that could be close, and could go anti-Trump with enough organizing effort. One of them is the New Jersey gubernatorial, whoo-hoo!