Vanguard – Because of operating outside authorized areas, failing to restore land and other environmental offenses, 16 mines -10 per cent – were closed in Coahuila in late 2015 and earlier this year. Six remain closed, while the other 10 corrected the irregularities.

http://www.vanguardia.com.mx/articulo/clausuran-10-de-minas-por-violar-ley-ambiental