The original grade here in front of the modular wall was more than 10' down! That's a LOT of compacted soil... the entire area was somewhere in the range of 800+ tandem truckloads of fill dirt which is held back by 10' of interlocking concrete blocks (modular wall). All of the drainage from this massive area extends to the far road near the Tee box, (the highest point) and emptying through a 4' diameter pipe. Rainfall runoff produces anything from a small creek to a small river. The last form is in place marking the lowest point of the Privacy... notice the wire back silt fence (held fast by metal spikes deep into the soil) continues around the area which is over the modular wall. It continues around the entire perimeter of the project, per County/ State and Federal code regulations. If there's no barrier for silt control, the fines can be massive!