Got some more info about the technicalities of the dam:
The idea of "emergency water" was not necessarily just for drought. It is also for when floods wash the camps' pumpstations in the rivers away. Then there is a month or so's water slightly uphill from the camp just in case, like Lake Panic too.
Sunset was scraped out as there was government money left over after the tarring of the H4-2, and heavy equipment on site.
So the road was made a "dam" there, and a huge pump installed at the weir in the Sabie a bit downstream from the camp which has its outlet out of sight at the far western end of the dam. (The shack you see at the weir on the H4-2 is for that old pump).
The small inlet you see near the parking is actually a secondary one, simply the overflow from the camp's own internal reservoirs that are fed by pumps next to the camp in the river, if that makes sense? It is now the only inlet as the aforementioned big pump has been abandoned for using an astronomical amount of electricity.
After the dam was filled it slowly became apparent that the pressure was too much for the base of the tar road, the surface of which began to crack.
So holes were drilled all along that stretch of road, pipes sunk and cement pumped in, to effectively "concrete" the "dam wall".
Some of the pipes still stick out in the parking.
Leachy, you must help here, that is how I remember the story!
