this invention is shown in fig1 a curb 10 next to a gutter 11 has a drain opening 12 which is usually rectangular the opening has a bottom edge 13 over which water will follow when it enters the opening in turn the opening enters into a catch basin 14 fig3 essentially this is a small u201c room u201d with a top in which a manhole 15 or other entry arrangement is fitted with a removable cover 16 from the catch basin a conduit 17 leads into a drainage system usually a storm drain intended to carry away water at flow rates which if not carried away would flood surrounding areas as stated before these basins must be kept free of amounts of trash that could clog them or depending on the nature of the trash contaminate or cause flooding downstream although the individual parts of the apparatus could be directly attached to structure of the curb and of the basin it is best manufacturing procedure to provide a structure which can be fitted in or attached to the surrounding opening a frame 18 fig2 3 and 7 includes two springy mounting arms 22 23 formed to a v shape brackets 24 25 are attached to the arms so this structure can be attached to the wall of the drain opening as shown in fig7 these arms are springy so as to cause them when installed to bear strongly against the wall of the drain opening the dashed lines in fig7 show the distorted installed free ends while in solid line are shown the undistorted ends prior to installation a brace 30 is attached to the two mounting arms to hold the base together attachment pins 31 32 33.