DAHANA Works on Morowali Power Plant

201401Operations

Looking from Indonesia’s geological structure, the land characteristic may be considered unique. At several islands in Indonesia, the rock –especially granite tended to have a high level of hardness.

This phenomenon caused several types of heavy equipments, such as breaker, drilling machine and other types of rock crusher unsuitable to be used at some construction projects in Indonesia.

Aside from work time loss, the rock hardness also caused cost inefficiency. On the other hand, the rapid development growth also increased the need of “rock crusher” every year. PT DAHANA (Persero) as a company providing blasting services saw this as a very potential business opportunity.

PT DAHANA, led by F. Harry Sampurno as the SOE’s CEO, through the Quarry and Construction Division had worked on several construction blasting projects concentrated in Java, Sumatra, Nusa Tenggara and Sulawesi. Among them was the construction of Morowali Micro-hydro Power Plant (PLTM). The power plant project was the second power plant project that DAHANA had ever worked on during the last year, the first one being Salira Steam Power Plant in Banten.

At the power plant project which was located in the village of Rawapadar, Lembo, Morowali, PT DAHANA worked on the construction of a channel trench to drain water to the micro-hydro generator owned by PT Buminata Ajiperkasa. In accordance with the power plant’s master plan, the power generated from the water flow of Panapa River had an installed capacity of 3x3,000 Kwh. The power plant would be generating electricity to the island of Sulawesi which at the moment continued to suffer from lack of electricity supply.

Morowali’s site coordinator, Suharno revealed that the blasting project which started in May 2012 would be completed in the mid of 2014. It took at least 3 tonnes of ANFO to produce 10 BCM of overburden each month. The region itself was widely known to have the second highest rainfall in Indonesia. Since the project used ANFO for blasting, in order to deal with the rainfall, Suharno said that they always used plastic liner in every blasting activity.
“Due to the climate factor here in Morowali, which has a high level of rainfall no matter what the season is, drilling and blasting can only be carried out at least 3 times a week,” Suharno explained. Assisted by 3 helpers and 1 blaster, every day Suharno was able to work on 60 blast holes with 4 meters of depth.

Although Morowali was very distant from Makassar –where the explosives unloading took place, the explosives supply could be considered to be smooth. This was due to the site location which was not far from the Trans Sulawesi main road, thus resulting on time explosives delivery. “The only problem that may occur (during explosives supply) would only be the weather and limited heavy equipments at the location,” Suharno said. (IDR)

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