Sebastian asked about the details of the base for the ecology blocks on the walls around my range. Here are some pictures and additional information.
The ground this time of year is really hard. It took a large dozer and a heavy excavator to get down to, essentially level. The range has a 1% grade down range to the target berm. A mini excavator was used to dig the footings about another six to eight inches deeper and three feet wide. This was filled with four inches of compacted and wetted, 3/4” with fines, gravel which was carefully (it took two people about two days complete this stage) made level. This deliberately did not match the 1% grade. Being level allowed for the back wall to be straight and have interlocking corners.
This first picture is looking down range from near the up range end of what will be the right wall.
This is the compactor in use along the left wall:
A four inch drain tile was put just inside the back wall (as seen on the right in the picture below) which exits under the right wall in the foreground:
Another drain tile, parallel to the first, will be placed 15 feet from the back wall and will catch drainage before it reaches the target berm. This will connect to the first drain tile with a Y a few feet outside the range.
The floor of the range will be covered with four inches of compacted, 3/4” with fines, gravel.