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ndonesia’s second-largest coal producer, PT Adaro Energy Tbk, announced an 11.7 percent increase in net revenue to US$757.2 million compared to the same period last year on the back of the increase in coal prices on the international market.

In its first quarter financial reports issued Sunday, the company said the rise in net revenue was contributed by a higher average selling price during the three-month period.

Net profit rose 11.3 percent to $108.9 million mainly due to the higher average selling price, foreign exchange gains of $8.7 million and no goodwill amortization as compared to $13 million incurred during the previous corresponding period, the company said.

“We had a good start to the year and are on the track to reach our 2011 target and implement our strategies to create sustainable value from Indonesian coal,” Adaro president director Garibaldi Thohir said in a written statement.

The company said profit increased despite the 6.8 percent and 4.8 percent decline in production and sales volume respectively, to 10.59 million tons and 10.91 million tons during the same period last year.

Production in the first quarter of 2011 declined from the same period last year as Adaro was unable to complete pre-stripping activities in preparation for the wet season due to unusual weather during 2010. The company’s production during the first and fourth quarters tends to be lower because of high rainfall during these periods.

Given the first quarter performance, Adaro is on track to achieve its forecasted production volume. The company’s cost of revenue increased 16.5 percent to $507.3 million due to higher planned strip ratio and longer overburden hauling distances.

Starting from 2011, Adaro will report its financial statements and notes in US dollar to minimize foreign currency conversion effects, considering all of the company’s subsidiaries report their accounts in US dollars as most of their income, costs and debts are denominated in dollars.

Adaro Energy is the second-largest thermal coal producer in Indonesia and is a significant supplier to the global thermal coal market. It continues to maintain a geographically diversified customer base by supplying no more than 10 percent of its sales volume to any one customer.