What is the recommended depth for coarse stone used in muskrat control?

The recommended depth for coarse stone used in muskrat control is three feet. This depth is deemed effective as it provides a sufficient barrier to discourage muskrats from burrowing or nesting in areas where they are not wanted. The coarse stone acts as an obstacle for muskrat activity, as they typically prefer to dig into softer soil or easier substrates for building their lodges or burrows. At three feet, there is a balance between being deep enough to impede the muskrats while still being manageable for installation and maintenance. Depths shallower than three feet may not provide the same level of effectiveness, as muskrats could potentially penetrate through the material, while going deeper could be impractical and unnecessary for effective control measures.