sentences:  It is headquartered in the state capital of Springfield.The former "Illinois Department of Conservation" was reorganized into the Illinois Department of Natural Resources by executive order in 1995.The reorganization, codified into state law by Public Act 89-50, also added functions of the former "Illinois Department of Energy and Natural Resources" and the "Illinois Department of Mines and Minerals" to the agglomerated agency 
  
  As of 2009, the Illinois Department of Natural Resources was divided up into 16 offices and bureaus 
  
  
  In 2017, parts of the Illinois Historic Preservation Agency, were folded in the IDNR and became the Illinois Historic Preservation Division.