Dear Ms. Brennan,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Correspondence Relating to Rivers and Harbors, 1923-1942 in the Records of the Office of the Chief of Engineers (Record Group 77) that may contain information about Lost Creek Dam in Pennsylvania. For more information, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
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 RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
You may wish to contact the Schuylkill County Historical Society for more information and/or resources.
We hope this is helpful. Best of luck with your family research!