Steven Cuevas/KPCC

Granite Construction operations manager Gary Johnson at Rosemary Quarry near Temecula

The battle over a proposed open-pit quarry in Southwest Riverside County heats up again, as a county planning commission is winding up public hearings over the contentious project. While supporters say Liberty Quarry will bring in god jobs and millions of dollars in tax revenue, opponents say the cost will come in hazards to public health and the environment. KPCC's Steven Cuevas reports.