We place diversion swales uphill of the house, catching runoff before it reaches the foundation.
Channels on steep ground are lined with rock, so fast water does not erode them.
Native plantings help swales blend into the hillside.
Swale length, the amount of earth moved, rock lining, and planting drive the cost. Steep slopes and rocky soil add labor. A short diversion above a house costs much less than a system protecting a house, deck, and long drive. We quote Larkspur surface work after walking the slope, ideally right after a storm or during melt when water is moving.
A shallow channel dug along the contour uphill of the home turns sheet flow sideways and sends it around the building long before it can pool against the walls.
On steep ground, cobble lining keeps channels from eroding during fast storm flows, and it looks like a natural streambed between rains.
Surface work pairs with French drains for underground seepage and slope stabilization. Our Larkspur irrigation and drainage team lays out every piece for your hillside.
We walk the slope, trace where runoff comes from, and plan diversions around the house and drive.
Our crew cuts swales, builds berms, and lines steep channels with rock.
We seed or plant the edges and check performance after the next storm or melt.