According to Denver Water they will begin draining antero when the ice on the res melts, which they guess will be mid April. They plan on releasing ~200 cfs from elevenmile starting in mid April thru may and June.
They want to keep flows low as they have data that shows that more fish survive the spawn at low flows, and they manage the south platte main stem for fishing. This is an estimate and doesn't mean that they won't go higher than this if they need to.
So, as it looks right now, no big flows are planned.