Spring Hill population jumped 1,600 percent since GM facility opened there . Future uncertain for about 3,000 workers ; GM could close , sell or phase out plant . Barnes ' father-in-law is anxious , like thousands of GM employees , and has resorted to yardwork to calm his nerves , he said . Comment: Resident says anxious father-in-law mowed lawn five times last week .
Spring Hill population jumped 1,600 percent since GM facility opened there . Future uncertain for about 3,000 workers ; GM could close , sell or phase out plant . Comment: Resident says anxious father-in-law mowed lawn five times last week .