The Downtown Development Authority (DDA) is initiating and coordinating the dwntown revitalization program for the Charter Township of Port Huron. The program's purpose is to promote and encourage the ecomonic development of the downtown district. DDA Development District Map. Projects have included the East Side Drain Project, street lighting and new light pole banners. Various sidewalk and paving projects have been implemented during the last several years. Building and maintaining working relationships with our many local business and property owners has been a high priority. In working with local businesses, property owners and the news media, the DDA is able to showcase the Township to companies or their agents looking to start or expand their business. We are also able to promote our goals, ideals and activities. A list of available properties is maintained by the DDA to assist and recruit new business and industry to the Township. For more information on available properties call 810-987-6600. We welcome your comments. If you seek information from the DDA that is not currently on the DDA website, or have suggestions for our website, please email us at email.