For over 50 years we have supplied the quality inside the products our customers make. We are one of Florida’s leading suppli ... ers of aggregate material for construction, roadbuilding, manufacturing and agriculture, supporting the growing infrastructure needs of all Floridians. Quality materials, state of the art mining techniques and superior logistical support as well as our fervent dedication to preservation help provide Florida with dependable ingredients for generations to come. E. R. Jahna Industries has mining operations throughout Central Florida and Georgia. For more information about our company, or to view our current job openings, visit our website. www.jahna.com read more