I thought these may have been part of Frank Speaks Post-Apoc, but it seems not.
In one story a family moves to a National Park (I remember a river running through) and are driven out after a fight with ex military (?))
May be the same story, Family takes over a farm with a hydro dam or wind mill (owners leave instructions to restart it)
Finally, possibly a third story, where the bad guys are using a dam as an invasion route and are defeated.
Do these ring any bells with anyone ??
Regards G_R