A Los Angeles city councilman is calling on the council and Mayor Eric Garcetti to oppose a crucial vote by a Southern California water board on a $17-billion project that would be funded in part by Los Angeles ratepayers. Councilman Paul Koretz introduced a resolution Friday that asks the city and Garcetti to formally object to a vote by the board of the Metropolitan Water District of Southern California on the project, known as California WaterFix. The 38-member board is scheduled to vote Tuesday on whether to commit $4.3 billion in MWD funds to the project.