Dear Mr. Arnold,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Field Notes for Public Land Survey Township Plats, 1789-1946 that include notes for Indiana and the Public Land Survey Township Plats, 1789-1946 in the Records of the Bureau of Land Management (Record Group 49) that may include Washington Township. The Field Notes have been digitized. For information on the township plats for Indiana, please contact the National Archives at College Park - Cartographic (RDSC) 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 RDSC. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!