BFD.
It is a big deal. Those tunnels are used to smuggle drugs. Each time one is found they fill it with concrete and the cartels just dig around the concrete. Maybe we should dump nuclear waste in them
That was coming soon...
Uuse that tunnel as a concrete foundation, or use it as a small underground bunker( with reinforcement of course but hey use it against these gophers) with sensors so they don’t dig on the side of the old tunnel. Heck bring in the coal, silver miners/engineers and they’ll have a lot of fun with this. Too early for my imagination right now.
So you like drugs?