Obviously there's the barrier—that's ongoing. There's another very large program they have below the existing barrier. That's a very intensive netting program whereby they're going out and removing large quantities of Asian carp in the areas immediately downstream of the barrier. The hope is that by reducing the pressure of these Asian carp below the barrier, they'll significantly reduce the opportunities for those carp to move above it.
There are also other barriers that are being put in place, such as the barrier on Eagle Marsh. There's a possibility that if there's flooding, the carp might be able to flow across water into other waterways, so they've constructed a barrier to stop adults migrating between systems.
One of the other exciting things that's ongoing right now is that the USGS has adopted a technology from the military. We're calling them “carp cannons”. It's essentially about using sound as a deterrent for Asian carp moving northward. They're in the process now of deploying these carp cannons and checking their effectiveness, as well, in trying to keep carp below the barriers. Of course, the concern is that if there's too much underwater sound, they're going to destroy whatever barrier or whatever structure is there, but it's also another promising technique.