Also, precious machinery and materials are idling to rust, and both state and central government have suffered revenue loss in the form of taxes, cess, etc.
"As a consequence of the closure, as per estimates, over $1.2 billion in precious foreign exchange was lost in (import) payments ie loss of around Rs 40,000 crore," he wrote.
At the same time, Pakistan's copper shipments to China increased to $550 million last year, up 400 per cent from $106 million three years ago.
"I therefore in all humility and earnestness appeal to you to take a judicious call to initiate measures to open and operate the plants in the overall interest of economy, employment which are essential components to develop country's foundation of 'Sabka Saath, Sabka Vikas, and Sabka Vishwas'," he added.
He praised the Prime Minister for his "daunting spirit and dogged and tenacious leadership" which helped contain the Covid-19 pandemic virus.
"Your proactive step has saved our country from potential disaster and serious devastation," he said.
He said the concept of 'Make in India' has been emphasised ever since Modi assumed office as Prime Minister in 2014.
"To that has been added 'Vocal for Local' to appeal the people to endorse local products so as to our avowed objective of transforming the quality of life, infrastructure and services and together building the India of our dream is achieved," he said.
He then drew attention to the closure of the 20-year old copper plant and 7-year old power plant. "The plant is state of the art with best technologies, environment friendly and highly efficient. It is a benchmark plant globally and employees of this plant are highly respected worldwide. It is a jewel in the crown for India as it served the nation for its infrastructure needs for many decades.