The Malmanie River and the Bulspruit River, two tributaries of the Mokolo, also enter the dam from its left side. The dam mainly serves municipal and industrial purposes. Since Iscor became part of Ellisras, Eskom also decided to extend its interest to Ellisras seeing that the steam coal produced is suitable for use in power stations and is used for the generation of steam. It happened by a decision by Eskom to build the air-cooled Matimba Power Station in close vicinity of the Iscor coal mine. Construction of the power station commenced in April 1981 and the first phase became operational shortly thereafter. Matimba was officially opened on 17 November 1989. Full municipal status was granted to Ellisras on 1 July 1986 by means of Administrator's notice 35 of 1986. 1990s The D'nyala Nature Reserve was the site for peace talks between Nobel Peace Prize winner F. W. de Klerk and Cyril Ramaphosa before the democratic transformation in South Africa. D'nyala is referred to as the original “bosberaad” (or bush conference) centre, based on the fact that it was used for hosting high level cabinet meetings of the former apartheid-government of South Africa prior to the first democratic elections of 1994. At the beginning of his presidency in 1989, former President F. W. de Klerk took his entire cabinet, plus a group of officials and advisors, to D'nyala for a two-day “bosberaad”. This conference involved discussions about policy development and strategies for change within the old South Africa. On 2 February 1990, a mere two months after this first bush conference, De Klerk announced the coming release of hundreds of political prisoners, including Nelson Mandela, and the legalization of black liberation organizations that had been outlawed for 30 years. He also proclaimed his then government's willingness to end apartheid and to negotiate a new constitution to the benefit of all South Africans. Over the next four years De Klerk returned to the D'nyala seven more times with various officials in order to work out solutions for crises that arose during the negotiation processes. In December 1992 and January 1993, for example, government officials and members of the African National Congress (ANC) met at D'nyala for two more bush conferences. It was after these meetings that the government and the ANC began formally working on the new constitution that would lead to South Africa's first democratic elections in April 1994. 2000s