would be four indoor arenas in the park in addition to the main venues, but the revised master plan published in 2006 reduced this to three, with the volleyball events moved to the Earls Court Exhibition Centre. The fencing arena was also cancelled, with the fencing events taking place at ExCeL London. The remaining indoor arenas are the Basketball Arena and the Copper Box, in addition to the Water Polo Arena, the Aquatics Centre, and the Velopark. The final design of the park was approved by the Olympic Delivery Authority and its planning-decisions committee. Legacy List charity The Legacy List is the independent charity for Queen Elizabeth Olympic Park, set up in 2011 to support the legacy of the Games. Their mission is to make creative connections between people and the Park by developing, commissioning and supporting high quality art, education and skill building initiatives, to engage, educate and inspire current and future generations. Construction During its construction over 80,000 workers were engaged on the project. The construction of the Olympic Park was managed by CLM Delivery Partner, comprising CH2M Hill ,Laing O'Rourke and Mace. CLM specifically managed the "white" space between the venue construction zones, including managing the internal road network. To enable the major phase of construction to begin, the 52 electricity pylons, up to high, that dominated the landscape in and around the park were removed and the power transferred through the new Lower Lea Valley Cable Tunnels constructed by Murphy. Also there was a roman village underground when they were digging it up Following site clearance, the soil across the Park site was cleaned down to a human health layer, by soil washing. Constituent sections of the park London Aquatics Centre Copper Box Arena Lee Valley Hockey and Tennis Centre Lee Valley VeloPark London Stadium ArcelorMittal Orbit East Village, London London Olympics Media Centre International Quarter London Northern Parklands In addition, at the time of the Olympic and Paralympic games: Eton Manor Riverbank Arena Water Polo Arena Basketball Arena Park Live Post-Olympics The park has been given over to a number of current and planned uses after the London 2012 Summer Olympics finished, such as: A part of the East London Tech City technology hub. One of the largest urban parks created in Western Europe for more than 150 years, designed to enrich and preserve the local environment, by restoring wetland habitats and planting native species