The hatchlings are being loaded into trucks and transported about 200 miles from the Coleman National Fish Hatchery to an area closer to where the river meets the Pacific. It's the first time in two decades that it has been necessary to ship them like this, but predators would likely claim too large a number of the little salmon if they were released normally.
This undertaking still has some major potential complications attached to it. According to The Verge, it's possible the fish might not know they should swim back up the river when it comes time for them to spawn in three to four years. The department has tagged about a quarter of them to monitor how they do. Scroll down to watch a video of the salmon shipping effort.