Residential on Punahou Street

Single-family residential fire rebuild in Altadena following the Eaton Fire. The lot is 200 feet long, with the top of the lot sitting about 14 feet higher than the rear. We took over this project from another civil engineer and changed the approach entirely.

The original design included retaining walls and a stormwater sump pump. We removed both. Instead, the house and garage match into the existing topography with only minor earthwork movement. That avoided the cost and complexity of walls and a pump system entirely.

A future pool pad was added below the proposed driveway. A proposed ADU sits on the lower level at the rear. We used sheet flow in addition to a pipe system to a series of plastic lined rain gardens. The plastic lined rain gardens handle a bit of excess volume of stormwater without triggering LID requirements or requiring a pump.