As construction workers put the finishing touches to a waste water pipeline at the hilltop [of G-Resource's] Martabe gold mine in North Sumatra, dozens of police and soldiers...keep close watch nearby...[M]ore than a thousand residents tried to storm the mine complex in October...angry about the construction of the pipeline, which will drain waste water from the mine into the Batang Toru river, the lifeblood of this small but densely-populated farming community...“We reject the plan to dump waste in our river, even if they offer us many community projects,” says Sulaiman Siregar, the head of Telo village...Peter Albert, chief executive of G-Resources, says that the waste water will be fully treated before being discharged and that the protests were the work of a small group of agitators which “took advantage of the situation and created mischief and misinformation”...[T]he trouble at Martabe...is indicative of the wider challenges facing foreign mining companies as they try to tap into Indonesia’s vast mineral potential...[Also refers to Freeport McMoRan, BlackRock, J.P. Morgan (part of JPMorgan Chase)]