This drainage trench will help to keep the gravel dry in the raised bed septic system. It will catch and divert water from the house site so it runs away from the septic field. 
The trench is drained by perforated pipe bedded in stone. The clay soil makes drainage more of a challenge than anyone expected.
Tag Archives: drainage
Finished Swale
Running the footing drain and radon vent to daylight
Two pipes run from the foundation. The radon vent pipe is from the inside of the footing. The footing drain circles the outside of the footing. 
Both pipes run down our excavated swale to daylight, draining to the hay field.
The plumbing is entirely bedded in a deep layer of drainage stone connected to the foundation drainage stone. This has created a wonderful continuous underground water channel carrying water away from the foundation.
Color coding against backfill
Turquoise = spray coat waterproofing Rub-R-Wall. Dark gray = 10″ blocks of dark gray Neopor. Pink = vertical strips of pink XPS blocking the seams, board and batten style.