A typical household uses something on the order of 1-2 MWh of power a month. This is something like 2-3 KW on average. 1 MW can thus support something like 300-500 households, and 50 MW can support 15000-25000 households, i.e. small to medium size town.
That may suffice for where they are installing the first one. [1] The county has 19k people. I assume it will be tied into the grid to shed some load from the other power plants.