The stairs going down to the cellar.
Yeah down far enough to start the supports and built the above ground extention to the top. The placement of the cellar is close to entry door to the house, handy for food storage and due to the awning it is shaded from about 8:00 in the morning till 6:00 the next day. Should manage cooling nicely. Will install a cool air draft pulling cool air from under the trailer into the bottom and an exhaust in the roof to vent the warmer air. Did research before starting this project and i think i covered all the bases. Guess ill know when the food goes in later in the fall.