It is recommended that roof gutters, downspouts, and a runoff conveyance system be installed on the completed structure to insure safe delivery of roof runoff away from fill slopes and onto a stable outlet to prevent unnecessary erosion.  One common method is the use of 4” corrugated black polyethylene pipe installed below the ground surface.

Runoff

If the cut bank will be exposed to significant volumes of runoff from the watershed above or if the soil is highly erodible, a diversion ditch or berm can be installed above the cut to intercept these flows.  This diversion can outlet in one or both directions and should have a stable outlet.

Base of the Cut Bank

The entire pad should be sloped slightly toward the rear in order that runoff will not flow over the fill slope.  The collection ditch at the base of the cut bank is meant to carry water from the pad as well as any water coming down from the cut bank.  This ditch can outlet at one or both ends and should have a stable outlet.

Bare Soil

All bare soil should be seeded and mulched.  This includes not only cut and fill slopes, but also disturbed areas resulting from underground utilities such as power, phone, septic tanks and leach fields.

Rock

No rock or similar irreducible material with a maximum dimension greater than twelve inches is to be buried or placed in fills.  No organic matter such as stumps, brush, or similar debris shall be placed in fills.

Fill Pads

On fill pads, be sure the footing trenches are excavated entirely through the fill and into native soil or tested to meet compaction standards of local building code.

Access Road