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EGAT started constructing Mae Moh Power Plant Units 4-7 Replacement to increase the efficiency of power generation and raise the standard of environmental measures. It would take 46 months to complete the construction with the expectation of commercial operation date in November 2018.


On April 25, 2015 at Mae Moh Power Plant site in Lampang Province, Mr. Areepong Bhoocha-oom, Permanent Secretary of Ministry of Energy chaired the first piling ceremony of Mae Moh Power Plant Units 4-7 Replacement Project. Mr. Soonchai Kumnoonsate, EGAT Governor, Mrs. Saithan Prasongkwamdee, Lampang Energy Officer, together with executives from public and private organizations, and media witnessed the ceremony. The investment budget of 36,800 million baht would be mostly spent on the facilities to take care of environment such as Selective Catalyst Reduction, Electrostatic Precipitator, and Flue Gas Desulfurization with the amount of 8,250 million baht or 22.41 % of the whole budget.

The Permanent Secretary said that electrical power was critical for the growth of the country’s economy. One of the important power policies was to have base load that could generate electricity all the time, also there should be suitable fuel diversification. Mae Moh Power Plant Units 4-7 Replacement could suit this policy as they were base load power plant using lignite produced within the site. Moreover, its price was lower than natural gas, and it could help reduce the use of natural gas for power generation that accounted for almost 70 percent, contributing to the security of power system in Thailand. Apart from Mae Moh Power Plant Units 4-7 Replacement, the Ministry also supported 2 more coal fired power plants namely Clean Coal technology power plant in Krabi Province and Clean Coal Power Plant in Thepa District, Songkhla Province to enhance the power system security in the southern provinces.

Mr. Soonchai Kumnoonsate, EGAT Governor, revealed that after the National Council for Peace and Order approved Mae Moh Power Plant Units 4-7 Replacement Project with the capacity of 600 MW on August 19, 2014 and National Environment Board approved the EHIA Report on December 17, 2014, it was a pleasure to celebrate the first piling. The construction would take 46 months, and the ultra-supercritical technology of the power plant would reduce the use of coal in Mae Moh Power Plant to 8,504 tons per day (the old one used the coal 13,536 tons per day).


Moreover, the standard of environmental protection was improved. SOx, NOx, and dust emission from the power plant stacks would be less. The environmental quality was monitored real-time via online system of Pollution Control Department to ensure that EGAT could take care of the environmental quality better than the standard.

Mae Moh Power Plant Units 4-7 Replacement would substitute the previous ones that operated for 33 years. The construction site was 63 rais with Alstom and Marubeni as contractors. The commercial operation date was expected in November 2018.


EGAT Governor also mentioned about the progression in following the Administrative Court’s verdict on Mae Moh Mine case that EGAT had proposed the better and more efficient measure and technology to deal with the impact on environment, replacing the previous measure that was approved by Office of Natural Resources and Environmental Policy and Planning before submission for the approval of Department of Primary Industries and Mines. Besides, EGAT proposed to appoint the committee whose members were local people and experts to consider the evacuation of affected people, which was approved by Lampang Governor. The progression to follow the court verdict was also reported to Chaing Mai Administrative Court.