A method is provided for maintaining the structured stability and configuration of golf course sand bunker borders which method comprises excavating the soil area adjacent the bunker edge, rigidly positioning adjacent open-top, uniquely designed compartments in the excavated area along the edge of the bunker, filling the compartment with soil to the top of each compartment and leveling the soil on top of the compartments. Each compartment comprises side panels, front and back panels and a bottom closure panel. The compartment is rigidly positioned by means of spikes driven through the back and front panel into the soil at the edge of the bunker and a spike through the bottom closure into the soil beneath the sand in the bunker.