out of the ground to a desired extent or by pushing downwardly on channel 40 which would drive the anchor 20 deeper since all of the concrete is poured at one time in a single mass there are no cracks or lines in the concrete through which ground water can seep thus not only is the entire system much easier to install but offers enhanced durability because of the integrity of the hardened concrete structure in which the individual channels 40 are buried after channels 40 are properly embedded in concrete a grating 50 is placed into the top opening 44 a bolt 51 is placed through a counter sunk hole 52 in grating 50 and into the fluid carrying space beneath top opening 44 a wing shaped locking member 54 is threaded onto the free end of bolt 51 locking member 54 is somewhat wider than the lateral dimensions of channel 40 and is designed to cooperate with a pair of recesses 55 and 56 formed on the inner surface of sidewalls 41 and 42 respectively by rotating bolt 51 locking member 54 fits into recesses 55 and 56 and as the bolt 51 is tightened locks grate 50 into the open end 44 of channel 40 therefore while grate 50 is securely locked into position on top of channel 40 it can easily be removed for access to channel 40 for cleaning or any other reason one of the important features of anchor 20 is that it only cooperates with the base 48 of channel 40 and does not extend upwardly to or across the top opening 44 and does not interfere in any respect with the placement on or removal from channel.