Construction and Interior Design
In the days of cold war, when Germany was on the front line between NATO and the Soviet Block, it became apparent that a nuclear war fought on German soil was a very real possibility. Therefore it was decided that some form of emergency seat was needed for the federal government, should Bonn become the target of an attack. After some deliberations the two tunnels were selected as the site for such an installation due to their proximity to Bonn and the rural surroundings which, unlike urban areas, would not attract air raids or missile attacks.
Construction of the bunker began in 1960 and lasted until 1972. The government bunker, also known by the neutral-sounding name Dienststelle Marienthal (Office Marienthal) was constructed inside the existing tunnels which had never been used for the purpose they had initially been built for. Additional tunnels of a total length of 17.3 km were driven and blasted into the soft slate mountains along the Ahr Valley to build an emergency seat for the federal government that would allow up 3,000 people to survive an attack for at least 30 days. At the time of construction the total length of all tunnels probably amounted to 19 km.
The facility was designed to withstand attacks with nuclear weapons and was fitted with autonomous supplies of electric power, fresh air and drinking water. Unlike other fortifications or military bunkers, however, there were no defence systems and it would have been protected by military units stationed nearby. The costs of construction were estimated at about DM 3 billion, although no precise figures are known due to the high level of secrecy.
The bunker built beneath 110m of slate rock consisted of two sections named Ost (East) and West which were separated by a valley and connected by a 60m deep passageway. The eastern section was partitioned again into two independent parts (Ost/West and Ost/Ost) and the western section into three parts (West/West, West/Mitte and West/Ost), each with tunnels parallel to and crossing the main tunnels. All tunnels were concrete-lined and most had two floors, with several exits and emergency escape routes. The main portals were sealed by manoeuvrable steel and concrete gates built by MAN, each weighing 25 tonnes. The bunker housed 897 offices and 936 dormitories and had 25,000 doors in total. It even had an underground hairdresser's salon.
Huge gates and ventilation lids were installed that could seal off the bunker hermetically within seconds. Drinking water was drawn from two deep wells. Air filters, supplies, kitchens, medical units, dentist's surgeries, etc. would have allowed for survival without contact with the outside world for up to 30 days. In the event of a nuclear attack it would have been possible to continue governing Germany and lead the federal army from inside the bunker. In its final capacity the bunker would have accommodated up to 3,000 people of which all but the federal president and chancellor would have slept in multi-bed dormitories fitted with only very basic furniture.
In the event of a defence situation the bunker would have accommodated the federal president, the chancellor, the joint defense committee, the president of the constitutional court, various ministries as well as civilian and military personnel. Briefings would have been held in large conference and map rooms situated next to the chancellor's office. Part of the A61 motorway (Autobahn) near the village of Gelsdorf had been designed for use as a runway and would have been used as an airport for the bunker with spacious aircraft parking spaces at both ends disguised as roadside car parks.
Every two years exercises took place in the bunker as part of NATO WINTEX whereby staff actually worked inside the hermetically sealed bunker for up to 30 days. Such exercises, for instance, involved the passing of bills by an emergency parliament of 22 members, including a mock chancellor and president. The bunker was used for the first time in October 1966 during the course of the NATO high command exercise FALLEX 66, and for the last time in 1987. The Berlin Wall came down two years later.
About 180 staff working in three shifts were required for maintaining, repairing and operating the bunker. In 2008 it became publicly known that the shelter would have just about withstood the detonation of a 20 kiloton bomb, comparable to the destructive force of the Hiroshima bomb. Secret surveys conducted as early as 1962 had found that 250-times more powerful weapons were to be expected and it had been made clear that the bunker would collapse if ever hit by a nuclear bomb. Despite this known fact, however, construction was continued for political reasons.
Read more about this topic: Government Bunker (Germany)
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