Remaining hole 111

Remaining hole 111
Geographical location	Elbe-Elster district , Brandenburg , Germany
Drain	→ Neugraben Plessa → Floßgraben → Hammergraben Lauchhammer → Schwarze Elster
Location close to the shore	Lauchhammer , Elsterwerda
	Data
Coordinates	51 ° 29 '38 " N , 13 ° 37' 57" E Coordinates: 51 ° 29 '38 " N , 13 ° 37' 57" E
surface	10 ha
length	900 m
width	140 m
Maximum depth	10.2 m

The remaining hole 111 (also called Plessaer See ) is a residual open pit lake in the Brandenburg district of Elbe-Elster . The lake, about 900 meters long and 140 meters wide, is located in the former Plessa opencast mine in the Koyne-Plessa lignite mining area. The deepest point of the body of water, which is divided into three sub-basins, is 10.2 meters in the middle sub-basin and around 7 meters in the other two. Its area covers about 10 hectares.

The body of water is located north of the village of Plessa in the area of the former Plessa Heath . It was created when the remaining hole was filled with groundwater after the mine was closed in 1959, and is therefore affected by severe acidification of the water. This prompted scientists from the Helmholtz Center for Environmental Research - UFZ to undertake a large-scale test here to improve the water quality of acidic mining lakes with biological means.

Footnotes and individual references

^ "Investigations into the sulfur cycle in the area of the open pit lake 111 (Lausitz)" in Wissenschaftliche Mitteilungen , Issue 19, Freiberg 2002, pages 86-90 ( online as PDF file )
↑ Kathrin Brüschke: Origin, forms of migration and whereabouts of main and trace elements in seepage and pore water of the former brown coal mine Zwenkau / Cospuden , Göttingen 2001, p. 24 ( online as PDF file )
↑ Rainer Deneke, Brigitte Nixdorf: Gewässerreport (Part 3): Limnological investigations in the Scharmützelsee area and in residual opencast lakes in Lausitz , 1997, p. 11 ( online as a PDF file ( memento of the original from June 20, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. ) @1@ 2

↑ Georg Rüschemeyer: As beautiful as a bath in vinegar and sulfur. In: Frankfurter Allgemeine Sonntagszeitung. June 18, 2006, accessed June 20, 2015 .

[1] "Investigations into the sulfur cycle in the area of the open pit lake 111 (Lausitz)" in Wissenschaftliche Mitteilungen , Issue 19, Freiberg 2002, pages 86-90 ( online as PDF file )

[2] Kathrin Brüschke: Origin, forms of migration and whereabouts of main and trace elements in seepage and pore water of the former brown coal mine Zwenkau / Cospuden , Göttingen 2001, p. 24 ( online as PDF file )

[3] Rainer Deneke, Brigitte Nixdorf: Gewässerreport (Part 3): Limnological investigations in the Scharmützelsee area and in residual opencast lakes in Lausitz , 1997, p. 11 ( online as a PDF file ( memento of the original from June 20, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. ) @1@ 2

[4] Georg Rüschemeyer: As beautiful as a bath in vinegar and sulfur. In: Frankfurter Allgemeine Sonntagszeitung. June 18, 2006, accessed June 20, 2015 .