Sine, you really need to stop being so sanctimonious.
1. I looked at the Wikipedia section on rattlesnakes and toxicity before I posted anything here, as well as several other sites so your wonderful cut-and-paste there is not exactly the informative revelation you're expecting.
2. I also looked into antivenin. It's not readily available for sale without a prescription, I believe. I will continue to look into it if it continues to be a problem.
3. The rattlesnake, as snakes are prone to do, most likely slithered out an alternate section of its tunnelling when I flooded the joint and took off for other pastures. If it comes back, I will have to decide what to do about it.
4. People in rural areas across the Southwestern United States do chop up and kill rattlesnakes with shovels or axes all the time. I've been looking at research on the Internet and asking around. You do it with heavy boots on, you take a long shovel blade, and you don't miss. That's how it's done. More often than not, even if you do miss, most of them will prefer to run instead of strike unless you trap them in a corner, which is something you don't want to do.
Yes, you can call Animal Control or the Fire Department around here if the snake is visibly resting somewhere, but a day later with the snake not having been seen since then? They will most likely to say that rattlesnakes are indigenous to the area, avoid them, wear boots, and call us if it comes out to rest in the open again.