No May Trout Plants?

Does any one know why there aren't any trout plants scheduled for May on the Kern River?
https://nrm.dfg.ca.gov/FishPlants/Defau ... e&time=All
https://nrm.dfg.ca.gov/FishPlants/Defau ... e&time=All
The pioneer on-line information source for the Kern River Valley, Kern River, Lake Isabella and Sequoia National Forest interests since 1995.
http://kernrivervalley.net/board/