The poster above misstated the cost. Its $2.5mil/mile. That number actually comes from PG&E in California, so its possibly not relevant to Houston. I couldn’t find that Centerpoint has actually done an analysis for Houston. Just to get an idea of scale, Centerpoint states on their website that they operate ~33,000 miles of above ground power lines.

Source: https://www.khou.com/article/news/news-explainers/the-why/ho...