Foundation issue: rat tunnels under the footing
We recently dealt with rats in our basement, and found some damage they'd created with their tunneling. The house has two foundations on the West and North sides and in the '50s the space between them was partially dug out to make room for plumbing. The dirt on the exterior was never shored up and when the rats started digging they collapsed a few feet of the dirt "wall" (first attachment).
I can build a wall to shore up the dirt (second attachment), but there is a void under the exterior foundation footing that I'm not sure how to effectively fill in the process.
Because our family economy is as screwed up as the national economy it's got to be DIY.
The void is only a few feet wide, and doesn't extend all the out, i.e. we can't see daylight under the foundation (yet). That area of the foundation is sheltered by a deck with a ceiling underneath the joists to keep the area dry (and direct rain to the roses).
Any advice how to proceed? Do I make mud and pack it in there as I'm building the shoring wall? Do I rent some sort of pump and pump it in?
Bill in Kansas City, MO
Measure with a micrometer
Mark with a crayon
Cut with an axe.