09/03/2026
Runoff on steep slopes, especially in wooded areas where grass doesn’t grow well, can cause significant damage when not intentionally managed. Upslope diversion swales are used in many applications, and they’re commonly used for septic drainfield protection. These swales had not received maintenance in quite some time leading to runoff eroding portions of the drainfield.
Yes, they can look awkward, but they’re intentional for keeping downslope things protected.