Image: 1836 map of canal system in Lowell, Massachusetts

Description: The power canal system of Lowell, Massachusetts as it appeared in 1836
Title: 1836 map of canal system in Lowell, Massachusetts
Credit: Locks and Canal Company, Lowell MA
Author: Mark Howland
Permission: Public domainPublic domainfalsefalse This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information. Creator: U.S. Department of the Interior, National Park Service, Historic American Engineering Record. Survey number HAER MA-1 Source: U.S. Library of Congress, Prints and Photographs Division, "Built in America" Collection. Copyright: "The original measured drawings and most of the photographs and data pages in HABS/HAER/HALS were created for the U.S. Government and are considered to be in the public domain."
Usage Terms: Public domain
License: Public domain
Attribution Required?: No