If only the miners had converted their vehicles to steam or electric. As to Kauai's hydro system, seems like it should be environmentally safe. Having just read John McPhee's "Founding Fish," he describes the terrible impact of rampant dam building on migrating fish (in case anyone is curious, the technical terms for migrating fish are anadromous and catadromous, with a whole set of more specific categories: amphidromous, potamodromous, oceanodromous, as well as the umbrella term, diadromous. https://en.wikipedia.org/wiki/Fish_migration#Classification). To have hydro power without an impedimental dam is a wonderful feat of inventiveness, perhaps with a hydroscaping waterfall.
If only the miners had converted their vehicles to steam or electric. As to Kauai's hydro system, seems like it should be environmentally safe. Having just read John McPhee's "Founding Fish," he describes the terrible impact of rampant dam building on migrating fish (in case anyone is curious, the technical terms for migrating fish are anadromous and catadromous, with a whole set of more specific categories: amphidromous, potamodromous, oceanodromous, as well as the umbrella term, diadromous. https://en.wikipedia.org/wiki/Fish_migration#Classification). To have hydro power without an impedimental dam is a wonderful feat of inventiveness, perhaps with a hydroscaping waterfall.