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Department of Environmental FacilitiesThe Department of Environmental Facilites was created in 1971 to oversee the County's operations dealing with recycling, garbage, sewer treatment plants and water districts. 

 

Historic Sewer Maps and Plans, 1906-1993 
Series 301
102 sets. Arranged alphabetically. Access Restricted

Maps and plans of the county sewer trunk system.  Access restricted to DEF staff only.