To address the problems identified in the study area, a total of 33 management measures were identified and discussed at various locations. The management measures were then screened to 25 management measures and then used to create a draft initial array of 13 alternatives. Based on screening criteria, an initial array of 4 alternatives was selected. Of those, Alternative 13 was determined to be the Preliminary Tentatively Selected Plan because of the ability to provide benefits in both WCA-3B and ENP, better meeting the project objective.
Alternative 2 (green dashed line): Construction of a semi-confining seepage wall (24-30 inches thick) west of the L-30 levee between the S-337 and S-335 structures and L-30 operations changes to reduce groundwater seepage from WCA-3B.
Alternative 4 (pink dashed line): Construction of a semi-confining seepage wall (24-30 inches thick) in the L-30 levee crown between the S-337 and S-335 structures and L-30 operations changes to reduce groundwater seepage from WCA-3B.
Alternative 11 (yellow dashed line): Construction of a semi-confining seepage wall (24-30 inches thick) in the L-31S levee crown between the S-331 and S-177 structures and South Dade Conveyance System operations changes to reduce groundwater seepage from ENP.
Alternative 13 (pink and yellow dashed line): Construction of a semi-confining seepage wall (24-30 inches thick) in the L-30 levee crown and the L-31S levee crown with operations changes in the L-30 canal and South Dade Conveyance System to reduce groundwater seepage from WCA-3B and ENP.