Put ECA to work for you. Advertise in ECA Magazine or on our web site and take advantage of the resource for the southern California heavy construction contractor. Since 1976, ECA’s 3,000+ readers and online viewer are owners or top management decision makers in the heavy construction industry. The publications and online features of the Engineering Contractors’ Association, including ECA Magazine, the annual ECA Directory & Buyer’s Guide, and ecasocal.org have been essential tools for today’s industry professional for both information and business development. ECA ‘s circulation reaches 11 counties from San Luis Obispo to Las Vegas to the Mexican border.