This detail shows the metal grating running along the top of the walk with two half round pipes that collect water that runs over it during rainstorms, as well as some of the runoff from the detention basin. There are also two pipes laid directly into stone three feet under the grating that is directly attached to the basin. This also has holes in the visible part to collect excess water.

The grating allows the pedestrians an oppertunity to see the water moving.