Dear Ms. King,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located World War II Operations Reports, 1940-1948 in the Records of the Adjutant General's Office, 1917-1981 (Record Group 407) that may have records of the Harbor Defenses of Portland and the coastal artillery units assigned to defend Portland. We also located Plans for the Defense of Coastal Installations, 1942 - 1948 in Record Group 407; Security Classified Correspondence and Maps Relating to Harbor and Coastal Defense Installations, 1921 - 1946 in the Records of the War Department General and Special Staffs (Record Group 165); General Correspondence, 1940 - 1942 in the Records of Headquarters Army Ground Forces (Record Group 337); and Historical Notes on Harbor Defense Units in Portland, Maine, 9/1941 - 1946 in the Records of U.S. Army Defense Commands (World War II), 1942 - 1946 (Record Group 499). Please contact National Archives at College Park - Textual Reference (RDT2) via email at Archives2reference@nara.gov for more information about these records.
We also located Coastal Defense Maps, ca. 1908 - 1940 in the Records of the Chiefs of Arms (Record Group 177). Please contact National Archives at College Park - Cartographic (RDSC) via email at email@example.com for further information about these maps.
In addition, we located Correspondence Relating to Fortifications, 1906 - 1935 and Construction Project Files, 1936 - 1952 in the Records of the Office of the Chief of Engineers (Record Group 77); and Correspondence, Reports, and Charts Relating to Projects for Land Defense, 1909 - 1921, Special Orders, 1913 - 1921, Battery Emplacement Book for Battery Hardman at Fort Baldwin, Maine, 1906 - 1920, Battery Emplacement Book for Battery Garesche at Fort Williams, Maine, 1903 - 1934, Record Book for Fort Williams, Maine, 1907 - ca. 1941, and Battery Emplacement Book for Fort Preble, Maine, 1904 - 1935, and General Correspondence, 1905 - 1918 in the Records of U.S. Army Coast Artillery Districts and Defenses (Record Group 392). Please contact National Archives at Boston (RE-BO) via email at firstname.lastname@example.org for more information about these records.
Finally, we located National Register of Historic Places and National Historic Landmarks Program Records, 2013 - 2017 in the Records of the National Park Service (Record Group 79) which includes Maine SP Battery Steele. This document has been digitized and may be viewed online through the Catalog. In addition to the information in the document itself, it includes a bibliography which may suggest further resources.
We hope this is helpful. Best of luck with your research!
I came here to research something not related to Maine, and nor do I live there, but oddly enough -- I happen to know a thing or two about the question you asked.
Relevant to your enquiry is a somewhat obscure book, the result of a dissertation, penned by Robert L. Bradley Ph.D., called The Forts of Maine 1607-1945, An Archaeological and Historical Survey. The pages of this were recently scanned and placed online through (what appears to be) a partnership between Maine State Library and Maine State Archives, through a website they run called Digital Maine. As it seems it's now in the open domain, I went one step further for you and OCR'ed the pages, so you can search them. Here is a link to it.
Other publications/resources that may be of use to whatever it is you're looking into, are:
- Maine Forts - Henry Ernest Dunnack - Google Books
- The Beginnings of Colonial Maine, 1602-1658 - Henry Burrage - Internet Archive
- "Map" section HERE and HERE.
- Colonial Muster Rolls of Maine Forts and Towns from 1700 to 1760 - A Partial ... - Elizabeth Freeman Reed - Google Books (for personnel only who served in these forts)
- Above the Gravel Bar - The Native Canoe Routes of Maine - David S. Cook (I have not read but was told it has a lot of thought within it re: fort location placement/strategy--esp in the 17th cent.)