It's a lot like oil and gas. There is a reservoir. Everyone is going to have a different sized reservoir, but you want to match the production with the injection. To make it renewable, you need to balance that.
If you want to sprint, you can take more and maybe slap on some more plants at the beginning, but then you'll run the reservoir down. That balance is really why a reservoir engineer is needed, much as in the case of oil and gas techniques. Some utilities shy away from geothermal because they don't have a resident reservoir engineer.
Those are the types of interplay between the oil and gas industry and the mining industry that we need to make with the utility company. They don't have these technical staff members. I think having data and by proving to them that these are measured resources—they may have been measured by another industry, but they are completely transferable to the data geothermal needs—would help.