Tech. - Industrial plants (misc)

At the site of an abandoned lumber mill near Sattley, California, USA. These were for the general burning of wood waste. They're obsolete now--they were a source of air pollution (smoke), and in any case, the "waste" is now valuable for wood products!

Coal-fired generating station just east of Castle Dale, Utah. This is a big coal-mining area, so presumably the fuel is of local origin. Thanks to Don Barrett for the ID of the plant.