Powerhouse - Additional Photos Underneath the Boiler Room
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A view of the general clutter down there.
A valve on a pipe.
More stuff overhead, including a ventilation fan (which looks like it may be part of a heater).
Pipes, valves, and more pipes and equipment.
A visitor to the site, C. Demaine, tells us that this is a 3 phase electrical disconnect switch. The glass window in the front is there so that you can look in and see that the blades of the three switches are actually physically disconnected before working on the disconnected machinery.
A data logging device that we think may be called an 'integrator'. They mark a 24-hour (usually) record of a sensor reading on a circular piece of paper. C. Demaine adds that the device could actually be a standalone chart recorder OR a an analog controller with built-in chart recorder. If it is an analog controller, then in addition to recording data from a sensor, the device also would control some valve or setting based on the input of the sensor.
Some switches or circuit breakers for a turbine, air compressor, and some other equipment (perhaps the 'Collection Tank'). C. Demaine adds the following: This is an Allen Bradley MCC (Motor Control Center). An MCC is essentially a device to switch electric motors on and off. (Evidently with large motors this is a bit more complicated than simply connecting or disconnecting the power supply.) The two disconnects visible here are used to ensure that the powered devices are disconnected from the power supply during maintenance operations. A lock can be passed through the handles to ensure that nobody turns them on and zaps the people working on the equipment. These two disconnects are indeed in the disconnected position. Most newer plants keep most of this electrical stuff in its own room where it doesn't get beat up as much.
Another one of those boiler air intakes, and one more in the background. They look pretty heavy-duty.