Original Geological Survey
The original geological survey for this house must have been extensive. The original architectural plans lay out precisely what earth is fill. It directs the builder to take earth from one section of the footprint to use as fill in another. I am amazed that an architect who never visited the site could know the site so well.
An important part of the original plans that were not implemented was a system of retaining walls on the west and north side of the house. The walls were to be made of logs, following the log theme called for in the plans. It is unfortunate that the walls were never installed.