Brazil alternative energy projects threatened by Abengoa's woes
* Abengoa halts construction of 6,300 km of new power lines
* Spanish company due to link giant Belo Monte dam to grid
* Halted lines would supply 3 million people
By Marcelo Teixeira and Luciano Costa
SAO PAULO, Dec 8 (Reuters) - Spanish conglomerate Abengoa , teetering on the verge of bankruptcy, has halted construction of power transmission lines in Brazil, a potential setback for the South America nation's bid to emerge from its worst energy crisis in 14 years.
Unions representing construction workers, a wind power industry group and Abengoa's sub-contractor on the new power lines said the Spanish company informed them of the interruption in recent days.
Abengoa, which opened pre-insolvency proceedings last month in Spain, holds concessions to build and operate 6,300 kilometers of transmission lines in Brazil that are vital to connecting dozens of wind farms to the grid.
It is also due to construct a line to transport power from the word's third-largest hydroelectric power dam, Belo Monte, in the Amazon state of Para to Brazil's power-hungry Northeast region starting in August.
"Work was suspended suddenly and we don't have any information at this point about a possible resumption," said Janaina Voltolini, a director at ETS Energia, a company providing services for Abengoa on four out of 11 new lines under construction. Continuación...