Are bald cypress roots a problem for foundations or pipes?

Knees are the root issue and they are conditional: Forest Service silvics describes them rising off lateral roots only where soil is saturated, ranging from a few inches to over 12 ft near open water. A cypress in a normally drained lawn usually produces none, but one at a basin edge will fill the mowing strip with wooden cones that destroy deck blades — and cutting them off is a repeating bill that wounds live roots, not a fix.