The traditional industries of the Harz mountains before WW II were quarries, sawmills, mines and ore smelters. Examples of these shall be installed on the layout for a double effect: they shall show visitors the historic economy of the region and they shall give the railroad a reason for being.
The big crusher of Königskopf quarry is of a generic design typical for the region. The bunker can hold two dozen carloads of ballast. The loading chutes can be operated by cables so live loading is possible.
The yellow building at Schlufterhütte is a mock model made of card and only the place holder for the definite model which is under construction now. The building was originally an iron ore smelter, later a forge hammer driven by a water wheel and at the time of the BAE was used as a foundry.
The sawmill of Siebertal is still not completely installed.
In former centuries most mines in the Harz mountains were digging for silver, some for iron ore. When the narrow gauge railroads began to crisscross the mountains, most of them were gone. The "prototype" for this free lanced mine building was the barite mine Wolkenhügel near Bad Lauterberg (see map).
That mine was served by a short line with 30" gauge, but on the BAE layout the mine branch is metre gauge, too, and generates a lot of traffic.
More details will be added to this chapter. Come back later, please.