Sub-drain system installation for retaining wall and restoration fill slope. A 4” diameter perforated PVC pipe was used and wrapped around a filter cloth and one cubic foot per linear of the width of the gravel base. The pipe holes were facing the bottom.
Geological Maps
North Hollywood hills have a geological formation of Medium Grain Granite Rock.
Source: Dibblee Geological Foundation
Parcel Map & Land Subdivision
On Site
Initial Hill Grading Sketches
Phase 1 - Escavate & Mine Columns
Phase 2 - Soil Survey & Transportation
Phase 3 - Bracing
Phase 4 - Slurry Concrete
Phase 5 - Grading & Landscape
