Original sentence: Above the ground are foundations for machinery and buildings, reservoir of water and storehouses with thousands of fossilized bags of cement.For the Riese project alone, more concrete was used than was earmarked in 1944 for the whole population for the construction of air-raid shelters... The headquarters was never finished, and in early March 1945, soon before the Red Army took over Silesia, SS bomb squads blew the whole thing up.In the documents of the Third Reich there are records which allow to assess the quantity of materials used in the construction of the project Riese
Edited sentence: Above the ground are foundations for machinery and buildings, a reservoir of water and storehouses with thousands of fossilized bags of cement.Before the entry of the Red Army many underground structures have been destroyed, or at least tunnels leading to them were blown up.For the Riese project alone, more concrete was used than was earmarked in 1944 for the whole population for the construction of air-raid shelters.In the documents of the Third Reich there are records which allow to assess the quantity of materials used in the construction of the project Riese and the volume of the tunnels