Several types of levees are present in the Rock Island District:

• Levees that are built, operated and maintained by the federal government
• Levees that are built by the federal government and turned over for operation and maintenance by a local sponsor
• Levees that have been constructed by a non-federal entity and are enrolled in the Corps' Rehabilitation and Inspection Program, and
• Levees that were neither built by the federal government nor are part of federal operations or maintenance programs