Metro Brick (A Division of Bristile Ltd) currently excavate clay for brick making purposes in a quarry located on Part Lot 36 Coondaree Parade, Upper Swan, just east of Great Northern Highway and about 14 km north of Midland. The environmental impact of the project was previously assessed by the Environmental Protection Authority in 1988 prior to the Minister for the Environment setting conditions on the project.

An Application for Renewal of Excavation Licence by Metro Brick Pty Ltd was referred to the Environmental Protection Authority by the Shire of Swan in August, 1990. The Authority has assessed the environmental impact of the proposal by way of a Consultative Environmental Review, in conjunction with other nearby clay excavation proposals which potentially impact on the habitat of the extremely rare and endangered Western Swamp Tortoise (Pseudemydura umbrina).