Santee's Woodside Avenue industrial corridor houses RG ROCK Landscape Materials, a bulk supplier of Mexican beach pebbles, river rock, and decorative stone serving residential and commercial projects. The supply yard stocks inventory for ground-cover and drainage-bed applications frequently installed by contractors such as LaBahn's Landscaping on Kenney Street. Sizes range from quarter-inch polished pebbles for planter accents through 6-inch-plus cobble for dry creek beds and erosion-control channels, available in black, gray, buff, and mixed colorways. Pool surround and water-feature projects draw from the same smooth-stone inventory used by aquatic contractors including San Diego Pools on Argent Street for deck-border and spillway-edge detailing. All product ships in sealed bags to prevent dust contamination, with bulk super-sack and palletized options available for full-truckload nationwide delivery at 24-ton capacity per flatbed.