Bob's Bunker Page 15

At this stage the excavation is nearing the bottom depth of 12 feet. This photo shows the stratification of the soil layers. The top 3 feet is fertile top soil over a layer of compacted loam. Below the 3 foot level is a layer of fine compated silt, and below that is Lake Michigan beach sand from the 5 foot level all the way down to 13 feet.
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