The heat pump is a geothermal unit,
Welcome Doc, I have what may be a silly question but your mention of a geothermal heat pump might fit with an idea I have.
Driving East from Eugene Oregon (pop. 160,000) you almost immediately begin to climb the Cascades over McKenzie Pass. Near the top are popular free & woodsy hot springs and a bath house. Other thermal springs dot the Cascades.
This tells me energy in the forms of heat and possibly steam lie near the surface and might be something we could tap into. I'm wondering if drilling down near but not into the source might get you enough heat to pipe hot water (or steam) downhill to Eugene for utilities use. The water source (snow or snowmelt) may be seasonal but then so might the need be seasonal. Either way there is snow on many of these mountains late into the Summer.
As you can see in the picture the thermal hot spots lie parallel to most of the state's population.
I don't know anything about geothermal heat pumps but had wondered if something (like a heat pump) could extract this energy in a usable form?
Back East we had mountains but these are a string of volcanoes and as such they're untapped energy sources.