The Ohio Coal Association is a trade association dedicated to representing Ohio’s coal industry. As a united front, the Association is committed to advancing the development and utilization of Ohio coal as an abundant, economic and environmentally sound energy source. The Ohio Coal Association appreciates your interest in Ohio’s coal industry. The information on this website has been compiled to assist you in better understanding our industry. The Ohio Coal Association is a trade association dedicated to representing Ohio’s coal industry.The Ohio Coal Association (OCA) is a non-profit trade association dedicated to representing the interests of Ohio’s underground and surface coal producers. The OCA represents nearly all of Ohio’s coal producers and more than 50 associate members, which include suppliers and consultants to the mining industry, coal sales agents and brokers and allied industries. The Ohio Coal Association is committed to advancing the development and utilization of Ohio coal as an abundant, affordable and environmentally sound energy source.