Drainage Details and Design

See attached memo and annotated sections.

The drainage plan has 14 scuppers.

On a related topic, I think that it may be advantageous to have the anchor pins, protrude 8 inches up for from the slab.

Some more things to consider:

1- The minimum pavement profile on the south side of the project will be 5.5 inches. This will accommodate a ½” drain sheet, 3 inches of granular base drainage media, and 2 inches of decomposed concrete. Where needed a 2-inch high perforated drainage conduit can be accommodated in this profile thickness. This means that the minimum soil depth adjacent to the pavement in this area will be 5.5 inches and not 4 inches.

2- Note also, that the thickened and raised slab cuts across the path. The super-elevation of this linear feature above slab appears to be 11.5 inches. In order to carry the pavement over this, the pavement profile in these areas will have to be 13.5 inches. I assume that this assumption is already built into the path design.

3- Please confirm that the curb surrounding the southern walkway will be precast concrete. It will vary in height depending on the thickness of the adjacent pavement profile.

4- The curb at the northern walkway will be metal

5- A number of the area roof drains on the northern side conflicts with a walls or curbs. These should be moved so that they are squarely under the pavement or the planted areas. If in the walkway, I assume that you will want surface grates (correct?)