> If you're a civilian looking at small to moderate-sized retaining walls on your personal property (4 feet or less in height) rather than a civil engineer des

> If you're a civilian looking at small to moderate-sized retaining walls on your personal property (4 feet or less in height) rather than a civil engineer designing massive projects for infrastructure, your retaining walls are almost certainly failing due to issues with drainage (not enough drainage material, incorrect drainage material) or possibly a heavy surcharge rather than the forces described here. These exact topics are covered in paragraphs 12, 13, and 14, respectively. 9:14 to 10:41 in the video