buckeyefarmer
Epic Contributor
Once you get the snakes out, maybe you can spray foam the hole. The foam would be easy to remove if you need to fork the container.
In Florida, our eastern diamond backs den in gopher holes (Gopher Tortise). The trick to getting the snake out is pouring a little gas down a tube in the back of the gopher hole. The snake comes right out. I don't know if it would be a good idea in this case but if you knew aproximately where he was and could coral him where he only had one exit, gas will do the trick if you are willing to take the gamble with a volitile liquid.
Youre going to have to block it off anyway to prevent this from happening again, just leave an exit and depending on how big your storage container is a cup or 2 of beach or gas poured through a small hole in the floor might do it. When you see him leave, shut the door.
It's really too bad that the channels aren't solid tubes. I was going to suggest that you put together one of these (using the channels as the barrel) to shoot the snake(s) into the next county:
How it Works: The Artillery-Grade 600 MPH Pumpkin Cannon | Popular Science
Then foam up the channel ends (as buckeyefarmer suggested).
BOB
You can also spread sulpher powder (get at local feed store) to keep them away. Also works on other pests too. Also you need to get rid of their food source (mice, rats etc.). On our place we've worked very hard to keep the mice away and we haven't spotted any snake of any kind in the last few years. Originally we had snake spottings on a weekly basis.
Good luck.