You wouldn't be able to replace the annual energy output of the Navajo Generating Station just with solar farms built on former NGS land, of course, because coal can be turned into electricity in a much smaller area. But if you consider the 44,000 acre leased area of the Kayenta Mine that supplies NGS with coal, you could actually get more annual energy production from the same area by switching to solar.
https://tucson.com/business/tribally-owned-solar-power-plant...
http://ktar.com/story/2189238/navajo-nation-kayenta-solar-re...
https://www.bizjournals.com/phoenix/news/2018/01/26/navajos-...
You wouldn't be able to replace the annual energy output of the Navajo Generating Station just with solar farms built on former NGS land, of course, because coal can be turned into electricity in a much smaller area. But if you consider the 44,000 acre leased area of the Kayenta Mine that supplies NGS with coal, you could actually get more annual energy production from the same area by switching to solar.