Here are some resolutions and statements against the Dakota Access Pipeline that I know about. If you have suggestions for additions, please include them in the comments, along with a link, if you have it.
Some Resolutions and Statements against DAPL Cities: Minneapolis Seattle Cleveland Urbana, IL Portland Corvallis, OR Labor Unions and bodies: Statement by the CWA Committee on Human Rights in Support of the Standing Rock Sioux Tribe ATU condemns attacks on Standing Rock Sioux and Opposes Dakota Access Pipeline Nurses Applaud Federal Move to Halt Dakota Pipeline, Call for Permanent End to Project AFL-CIO Constituency Groups Stand with Native Americans to Stop the Dakota Access Pipeline UE SEIU Statement on Standing Rock Sioux and Dakota Access Pipeline
Congress:
McCollum Letter Urges Greater Army Corps Consultation with Standing Rock Sioux on Dakota Access Pipeline
Administration:
Joint Statement from the Department of Justice, the Department of the Army and the Department of the Interior Regarding Standing Rock Sioux Tribe v. U.S. Army Corps of Engineers