|Location:||A7 exit Hann. Münden/Werratal, F80 east 85 km to Nordhausen or A7 exit Seesen(Harz), B243 66 km tp Nordhausen. In Nordhausen F4 turn north towards Blankenburg, at the city limits turn left, follow signs to Mahn- und Gedenkstätte Mittelbau Dora. After the turnoff to Mittelbau Dora turn richt on dirt road, 500 m to garden .|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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|Size of the spring||2450 m²|
|Size NNW to SSE||125 m|
|Depth of spring||30 bis 79 cm|
|Minimum yield||2131 l/s|
|Maximum yield||14351 l/s|
|Medium yield||7041 l/s|
|Yearly yield||66 bis 446 Mio m³|
|Average yearly yield||218.97 Mio m³|
|Altitude of water table||196 m asl|
|Water temperature||8.5 bis 10.2 °Celsius|
|Average water temperature||9.7 °Celsius|
|Average air temperature||8.1 °Celsius|
|Length of Salza river||58.25 km|
|Decline of Salza to estuary into Helme||18 m|
|Medium yield||2 Mio km/a|
|Average water temperature||10,1 °Celsius|
Salzaspring is a huge karst spring with one big source and numerous small sources, e.g. the Tabaksbeutel (tobacco bag) and the Stiefel (boot). Those sources are very shallow. The Grundloses Loch (groundless pit) lies to the south and is much deeper. This source is an underwater doline and the water is deep enoughto show the typical green colour of water containing a high amount of gypsum.
The water of the spring comes from three nearby rivers Zorge, Kelle and Wieda. Those rivers flow about 5 km north, on the other side of the Kohnsteins. The water seeps into the gypsum, crosses the Kohnstein underground and reappears here.
The Kohnsteins is a mountain ridge which reaches 300 m asl. The gypsum is mined in a big quarry in the north. But it got a certain kind of prominency, as it was the place of the subterranean V2 factory during World War II. The nearby Konzentrationslager Mittelbau Dora and the subterranean factory are open to the public.
The Salzaspring does not freeze in Winter, a good reason for a very early settlement in this area. The quarter Salza of Nordhausen was founded in 786.