This series contains licensing applications to the Department of Public Health for permission to maintain and/or improve water impoundments, usually small farm ponds and private lakes. Also included are some supporting documents and copies of permits granted. The applications contain the following information: 1) size and depth of body of water; 2) size of dam; 3) proposed use of water; 4) dates of beginning and completion of construction; 5) specific location of impoundment site; 6) location sketch; 7) name, address and signature of applicant; 8) date of application; 9) signature of person or official assisting in filing application; 10) permit number. Prior to 1966 the files also contained the following information 1) recommendations from the county sanitarians; 2) requests for applications! 3) requests for information concerning application procedures; 4) maps and charts showing impoundment locations. Information concerning larger water projects such as public lakes, rivers, dams, etc. can be found in Series 46, Watershed Work Plans File.