A drainage catch basin is formed from a rectangular trough with a planar
upper rim defined by at least two opposite sidewalls and includes at
least one inner wall forming a lower rim to define the gutter opening for
flush mounting with the curb. The basin is covered by a top with a planar
bottom that preferably includes a central circular manhole cover. The top
is preferably formed by first providing a mold having a bottom and side
frame of steel plates reinforced by a galvanized steel nosing and
crossing rebar. The mold is then filled by concrete casting while
installed on the catch basin trough to match the exterior color and/or
finish of the adjacent sidewalk, street and/or curb.