#11 of the images Cold Season Exclusive: Explore Kannana Underground’s ‘Regulating Pond’ and Flood Protection Tunnel | FRIDAY DIGITAL

Zempukuji River water intake facility. The circle on the wall is the same size as the diameter of the underground reservoir.

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Cold Season Exclusive: Explore Kannana Underground’s ‘Regulating Pond’ and Flood Protection Tunnel

11/18

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