Qualla: Panjiakou Dam

Panjiakou Dam: Introduction

Sat, 14 Mar 2026 00:00:00 GMT

When the Panjiakou Reservoir filled, it swallowed a town. The settlement of Panjiakou vanished beneath 50 meters of water, taking with it a section of the Great Wall of China that ran through the local mountain pass. The wall had stood for centuries as a border between worlds -- the farmlands of China proper to the south, the steppe to the north. Now it sits underwater, invisible in wet years, but during droughts, when the reservoir drops, a portion of the submerged wall emerges on a small island at the reservoir's edge, stone battlements rising from the waterline like something from a half-remembered dream.

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Panjiakou Dam: Water for Millions

Sat, 14 Mar 2026 00:00:00 GMT

The Panjiakou Dam is a concrete gravity dam on the Luan River in Qianxi County, Hebei Province, and its primary purpose is straightforward: provide water to the cities of Tianjin and Tangshan to the south. These are not small consumers. Tianjin alone has a population of over 13 m...

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Panjiakou Dam: The Pump That Runs in Reverse

Sat, 14 Mar 2026 00:00:00 GMT

Panjiakou's second stage, completed in 1993, added a sophisticated pumped-storage power system. During periods of peak electricity demand, water from the main reservoir is released through three 90-megawatt reversible Francis turbine pump-generators, producing power as it flows t...

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Panjiakou Dam: The Great Wall Underwater

Sat, 14 Mar 2026 00:00:00 GMT

The submerged Great Wall section is Panjiakou's most haunting feature. The wall ran through Panjiakou Pass in the hills above the old town, and when the reservoir was planned, the wall's submersion was an accepted cost of progress. During years of normal rainfall, the wall is inv...

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Panjiakou Dam: Spillways and Survival

Sat, 14 Mar 2026 00:00:00 GMT

The dam's spillway, located on its left face, contains 18 floodgates capable of discharging 40,400 cubic meters per second -- a capacity designed for catastrophic flood scenarios on the Luan River. This engineering redundancy exists because dam failure at Panjiakou would be measu...

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