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第89話＜大切坑＞.pdf

83c5cbe0bc040da41512dde77bc81e3e.pdf

🔗 Source: asia-arsenic.jp

📊 Size: 354 KB

👤 Author: Owner

⬇️ Downloads: 55

Summary

The Taisetsu Tunnel, also known as the "Taisetsu Pit," was a drainage tunnel dug around 1935. After the war, it became a major tunnel for extracting sulfur iron ore, but it flooded at a depth of 110 meters underground, causing the mine to close. The large amount of water that flowed out was welcomed by farmers, but the water quality improvement work to reduce the arsenic concentration was difficult and was completed only last March.

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Description

The Taisetsu Tunnel, also known as the "Taisetsu Pit," was a drainage tunnel dug around 1935.

Technical Information

File Format: PDF
File Size: 354 KB
Pages: 7
Language: EN
Author: Owner
Total Downloads: 55
Last Updated: 2 months ago

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