Welcome to History Hub
The following is a link to the Library of Congress, I don't know much about surveys but these photos may be what you are looking for.
Have you contacted the Minnesota Historical Society with your question?
Below are a couple links to them
maps in the collection of the Minnesota Historical Society
There is a form on the following page where you can send questions.
Dear Mr. Reardon,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Civil Works Project Files, 1866 - 1997 in the Records of the Office of the Chief of Engineers (Record Group 77) that may include records relating to the construction at Lake Winnibigoshish and any work performed in preparation for the construction. For more information about these records, email the National Archives at Chicago (RM-CH) at email@example.com.
In addition, there may be related maps or records at the National Archives at College Park - Cartographic (RDSC). Please contact RDSC via email at firstname.lastname@example.org for more information.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RM-CH and RDSC. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!