Turning a Hillside Into a Stream: Water Features for Sloped Yards

Sloped yards frustrate a lot of homeowners, but for water feature builders they're a gift. Elevation change is exactly what a stream needs, and the Santa Cruz Mountains and coastal hills are full of properties with grade to spare.

Water and Stone Landscapes, based in Santa Cruz, has made hillside streams a specialty. Their projects thread recirculating water down natural-looking courses of boulders and gravel, with drops and pools placed to make the most of the existing slope — features that look like they were discovered on the property rather than built on it.

Engineering a stream on a slope

A hillside stream needs a stable excavated course, a liner system pinned against downhill creep, and a reservoir at the base large enough to hold the stream's full volume when the pump shuts off. Drop structures — stone weirs and falls — control the water's speed and sound.

• Work with the slope; don't fight it with excessive excavation
• Alternate quiet pools with lively drops for natural rhythm
• Oversize the lower reservoir for pump-off water volume
• Plant the banks heavily to anchor soil and soften edges

The naturalistic difference

Anyone can run water downhill. Making it look like a natural watercourse — varied widths, mossy pockets, stone that sits like it eroded into place — is craft. It is the specific quality that Water and Stone Landscapes' stream projects are praised for, and the reason their hillside work shows up so often in regional landscape portfolios.