Alternate piles (known as “female”, “intermediate” or “primary” piles) are drilled inside temporary steel casing and constructed without reinforcement using a slow setting concrete. Temporary casing is extracted while the concrete has not fully set and heavy casing is then driven into the intervening pile location cutting into the fresh concrete of the adjacent female piles. The “male”, “secondary” or “king” piles are then promptly drilled. The male pile steel cage reinforcement is inserted and structural concrete is poured adhering to the female pile concrete on either side to form a watertight continuous wall.