Pinedale, WY – For a second straight year, drilling for natural gas will occur in mule deer winter range in southwestern Wyoming. That has raised concern among environmental groups. On Friday, Questar Exploration and Development Company received federal approval to drill eight wells on the Pinedale Mesa. Four of the wells would be drilled throughout the winter. As the company did last year, Questar will employ directional drilling to minimize surface disturbances. But environmental groups say winter drilling fragments crucial wildlife habitat for wintering deer and antelope. B-L-M officials allowed the winter drilling in part to study how drilling activity affects mule deer migration.