The PL 84-99 design standard is specified by the Army Corps of Engineers and sets a minimum requirement for all federal flood control project levees.
Non-project levees can become part of the PL 84-99 program if the levees meet the design standard and pass an initial inspection. They would then become eligible for Corps emergency assistance as well as levee rehabilitation expenses should damage occur. A few local agencies have taken the steps necessary to become qualified under this program.
Recognizing that the PL 84-99 standard was developed primarily for conditions elsewhere, the Army Corps has developed a “Delta-Specific” version of this standard for non-federal levees in the Delta to make allowances for the Delta’s organic soils and foundation conditions.