= Hole Under foundation at 4180 99th =
|| {{ attachment:8.jpg | | width=160 }} || [[ attachment:8.jpg | larger view ]] || Hole dug in foundation between basement door and air conditioner.  I will add a 20 amp waterproof duplex power outlet to the outside wall, probably 2 feet above the air conditioner power line.  A natural gas pipe runs from the driveway to the gas meter, approximately parallel to the back extension of the house, about 18 inches down.  A french drain (in gravel) runs somewhat deeper and farther to the right.||
|| {{ attachment:9.jpg | | width=160 }} || [[ attachment:9.jpg | larger view ]] || Viewed from back.  The spigot to the left runs to another spigot in the middle south side of the yard, but is otherwise disconnected ||
|| {{ attachment:1.jpg | | width=160 }} || [[ attachment:1.jpg | larger view ]] || Closer view of the hole.  The thin black line marks the location of the bottom of the basement slab, determined with a plastic pipe water level.  I presume a pipe hole can be drilled through the foundation just below the line, if there is some way to detect and avoid cutting through rebar in the concrete. ||
|| {{ attachment:2.jpg | | width=150 }} || [[ attachment:2.jpg | larger view ]] || View down into the hole.  Mostly dug with a seed drill and the edge of a flat bar, scooped out with a garden trowel. ||
|| {{ attachment:4.jpg | | width=160 }} || [[ attachment:4.jpg | larger view ]] || view from inside the hole, looking up.  Top of the photo faces outside.  A large "mushroom" of concrete extends into the middle of the foundation about 9(?) inches.  The hole through the foundation will run above this. ||
|| {{ attachment:a.jpg | | width=160 }} || [[ attachment:a.jpg | larger view ]] || View looking vertically to the top of the hole, under the foundation.  Since this photo was taken, the clay dried out and the gravel fell down.  The gravel is a mix of pea gravel and inch-sized sharp rocks, and from the volume of gravel that fell, the layer is one to two inches thick below the slab. ||

I'm still learning to use my borescope, but a video suggests some plastic between the gravel and the slab.  Haven't learned how to attach videos to this webpage yet.