Golf course sand bunker with liner and method of making the same

A method of stabilizing and lining a golf course bunker to be covered with sand comprising the steps of:

• a. preparing soil of the golf course by forming said soil and surrounding landscape into a desired configuration of a bunker having an opening, a top edge, a lip surrounding said opening, a floor, sides and turf surrounding said opening, said sides having a downward sloping grade;
• b. grading said top edge and said lip surrounding said opening to form a key way surrounding said opening, said key way having a grade extending outward and downward from said opening at an acute angle to the grade of said sides to form a hinge point therebetween, said key way extending underneath a portion of said turf surrounding said opening;
• c. compacting said soil to produce a compacted soil surface;
• d. forming a barrier liner for said bunker by applying a curable semi-solid barrier material on said compacted soil surface of said floor, on said sides, up and over said hinge point, and on said key way, said curable semi-solid material on said key way extending under a portion of said turf surrounding said opening for a predetermined distance outside said hinge point, said barrier liner having a thickness at said key way which is greater than a thickness of said barrier liner at said sides;
• and
• g. allowing said barrier liner to cure, whereupon said cured barrier liner is configured to be covered with sand and which allows water to percolate therethrough to reduce water accumulation in said bunker and is sufficiently flexible to dampen or absorb impact when a golf ball hits said bunker.