This book is a report from a commission that investigated the state of US port and harbor facilities in the mid-20th century. The report covers twenty-seven ports across the country and provides detailed data on their infrastructure, capacity, and economic impact. While this book may be of limited interest to general readers, it is an important resource for historians and policymakers studying the development of US commercial infrastructure. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.