* Brazil agency OKs start-up of huge dam in Amazon
* Consortium has go-ahead to clear forest, start site
SAO PAULO, Jan 26 (Reuters) - Brazil's environment agency approved on Wednesday the start-up of the Belo Monte power dam, a controversial $17 billion project in the Amazon that has drawn criticism from native Indians and conservationists.
The agency, Ibama, issued licenses to the consortium in charge of Belo Monte to start the construction site and to clear 238.1 hectares (588 acres) of forest land, about the size of Monaco.