The building contractors' consortium of the autonomous province Bozen, South Tyrol was commissioned with the estate finding and planning and with the execution of construction works. The building contractors consortium is an association of qualified local contractors whose objective is to increase their productivity and competitive ability.

Timetable

1990
- Selection of the six construction
  companies through the South
  Tyrolean building contractors'
  consortium
- Resolution of the
  provincial government
- Decision for awarding of a license
- Contract to the building
  contractors' consortium

1991
- Signing of the contract
- official authorisation
- First blastings
- Drilling of the inlet gallery
  with a TBM by ILLBAU

1992 - 1993
- Blast and drill according to the New
  Austrian Tunnelling Method (NATM)
  in three caverns
- 200.000 m3 solid material
- 220 tonnes explosives

1993 - 1994
- Concrete works
- Concrete: 50,000 m3
- Reinforcing steel:
  approx. 1,500 tonnes

1995
- Assembling of the electro-technical
  and mechanical-technical plant
- On schedule clearance of the
   plant for operational tests

3. Juli 1996
- Punctual opening of plant
  after completing the
  operational tests

Year 1998
- Start up sludge dryer

2004 - 2005
- Installation and Start up   thermal recycling plant

March – July 2008
- new sludge head dryer