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Title:	Supplemental Environmental Assessment and Finding of No Significant Impact : Installation, Testing and Monitoring of a Physical Model for the Water Conservation Area 3 Decompartmentalization and Sheetflow Enhancement Project : Incorporation of the L-67C Backfill Treatments into the Central Everglades Planning Project, Miami-Dade County, Florida
Authors:	United States. Army. Corps of Engineers. Jacksonville District.
Keywords:	Everglades (Fla.) Restoration ecology Environmental management Environmental protection
Publisher:	United States. Army. Corps of Engineers. Jacksonville District.
Abstract:	The Decompartmentalization and Sheetflow Enhancement Physical Model (DPM) is a limited duration, fully controlled field test conducted along a 3,000-foot stretch of the L-67A and L-67C levees and canals in Water Conservation Area 3A (WCA 3A) and WCA 3B. The field test included: (1) the construction of 10, 60-inch culverts (collectively called S-152) along a stretch of the L-67A levee; (2) three 1,000-foot back-fill treatments (no backfill, partial backfill and complete backfill) located within the L-67C canal (approximately 9,000 feet south, southeast of S-152 on the L-67A levee); and (3) the gapping of the L-67C levee for 3,000 feet, directly east of the backfill treatments, which allowed for the flow of water from WCA 3A to pass through the culverts, through the “pocket”, across the backfill treatments and into WCA 3B. “The pocket” is bounded on the upstream (northwest) side by the L-67A canal and levee system and on the downstream (southeast) side by the L-67C canal and levee system. The DPM was implemented to address two key uncertainties of the Comprehensive Everglades Restoration Plan (CERP): (1) the magnitude and direction of sheetflow necessary to maintain the landscape characteristics of the Everglades, and (2) the degree of canal backfill necessary for restoring the ecological attributes of the historic ridge and slough landscape, specific to canals that run perpendicular to sheetflow directionality. This section discusses the purpose and need for the incorporation of backfill treatments constructed in the L-67C canal associated with the DPM into the Central Everglades Planning Project (CEPP) (South Phase) as permanent project features.
Description:	Supplemental Environmental Assessment and Finding of No Significant Impact
Rights:	Approved for Public Release; Distribution is Unlimited
URI:	https://hdl.handle.net/11681/46509
Size:	142 pages / 10.84 MB
Types of Materials:	PDF
Appears in Collections:	Environmental Documents