That's a good description site but not an official status site. INF administers the ravine as part of the trailhead campground:
https://www.fs.usda.gov/recarea/inyo/recarea/?recid=20704It is currently listed as no water, closed. It might be good to check ahead before you count on it this year. For the full INF campground list:
https://www.fs.usda.gov/recmain/inyo/recreationDale B. Dalrymple