Gravitational Dewatering Tunnel Completed

Young people in South Phyongan Province have successfully completed the construction of the Chonsong-Songsan Stream gravitational dewatering tunnel by digging the thousands-of-metres-long waterway tunnel.

The completion of the tunnel construction laid material and technological foundations for remarkably increasing production in the coalfields in the western part of the country by draining underground water of large-size coal mines through the gravitational waterway.

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