Qualla: John Hart Dam

John Hart Dam: Introduction

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Carport, CC BY-SA 3.0. In 1984, engineers reviewing the foundations of John Hart Dam discovered something alarming: the entire structure sat on loose, saturated sands and silts. The dam had been generating power on the Campbell River since 1947, and for nearly four decades no one had fully reckoned with what lay beneath it. A series of earthquakes across British Columbia had revealed that dams built before 1961 were vulnerable to liquefaction -- the terrifying phenomenon where solid ground behaves like liquid during seismic shaking. John Hart Dam was one of them.

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Image: Carport | CC BY-SA 3.0

John Hart Dam: A Premier's Legacy in Concrete

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit Isochrone, CC BY-SA 4.0. The BC Power Commission completed the original John Hart Generating Station in 1947, naming it after John Hart, Premier of British Columbia from 1941 to 1947. The facility was a product of postwar optimism and Vancouver Island's growing appetite for electricity. Six turbine-gener...

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Image: Isochrone | CC BY-SA 4.0

John Hart Dam: The Ground Beneath

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit No machine-readable author provided. Qyd assumed (based on copyright claims)., Public domain. By 1979, BC Hydro had grown concerned about the safety of its older dams. Earthquakes had demonstrated that certain soil conditions could turn stable ground into something resembling quicksand during a tremor. A formal review, begun in 1984, confirmed the worst: John Hart Dam res...

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Image: No machine-readable author provided. Qyd assumed (based on copyright claims). | Public domain

John Hart Dam: Going Underground

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit No machine-readable author provided. Qyd assumed (based on copyright claims)., Public domain. In 2014, BC Hydro committed to a comprehensive replacement. Contracts went to SNC-Lavalin to design and build a new generating station, along with two new penstocks stretching two kilometres from the dam to the powerhouse. The critical difference from the original: the new pensto...

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Image: No machine-readable author provided. Qyd assumed (based on copyright claims). | Public domain

John Hart Dam: A Billion-Dollar Rebirth

Sat, 21 Mar 2026 00:00:00 GMT

Photo credit No machine-readable author provided. Qyd assumed (based on copyright claims)., Public domain. The project was completed in 2018 at a cost of 1.1 billion dollars, making it one of the largest hydroelectric projects in British Columbia in decades. The new powerhouse delivered a slightly increased capacity of 132.2 megawatts -- a modest gain in raw power, but a transformativ...

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Image: No machine-readable author provided. Qyd assumed (based on copyright claims). | Public domain