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https://hdl.handle.net/11681/25945Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | United States. Army. Corps of Engineers. Jacksonville District. | - |
| dc.date.accessioned | 2017-12-29T21:49:04Z | - |
| dc.date.available | 2017-12-29T21:49:04Z | - |
| dc.date.issued | 2017-02 | - |
| dc.identifier.uri | http://hdl.handle.net/11681/25945 | - |
| dc.description.abstract | The 2012 Water Conservation Areas, Everglades National Park (ENP), and ENP-South Dade Conveyance System Water Control Plan (2012 Water Control Plan) is the current approved Water Control Plan governing operations within the Modified Water Deliveries (MWD) field test project area. The 2012 Water Control Plan, which includes the operational guidance for the Everglades Restoration Transition Plan (ERTP), modified the WCA-3A Regulation Schedule from the 2002/2006 Interim Operational Plan (IOP) for Protection of the Cape Sable Seaside Sparrow (CSSS), including lowering of the top zone (Zone A) of the Regulation Schedule, expansion of Zone E1 and removal of the seasonal closure of S-12C. These 2012 Water Control Plan changes were expected to reduce the need for S-334 releases from WCA-3A to the South Dade Conveyance System (SDCS) during Column 2 operations. The G-3273 Constraint Relaxation/S-356 Field Test and S-357N Operational Strategy (previously referred to as “Increment 1”), was initiated on 15 October 2015 through a temporary deviation from specific water management operating criteria contained in the 2012 Water Control Plan. The Increment 1 Field Test was the first in a series of related, incremental efforts that will result in a Comprehensive Operational Plan (COP) to be incorporated into the 2012 Water Control Plan. The incremental approach to the development of the COP will 1) allow interim benefits towards restoration of the natural systems, 2) reduce uncertainty of operating the components of the MWD and C-111 South Dade Projects, and 3) provide information to complete the COP efficiently. The first two increments are field tests that will be conducted to assist future development of Increment 3, the COP, for the operation of the MWD to ENP and C‐111 South Dade Projects. The Increment 1 field test included relaxing the G-3273 stage constraint on the delivery of water to ENP Northeast Shark River Slough (NESRS). Increment 1 duration was planned for approximately one to two years, until completion of critical components of the MWD and C-111 South Dade projects needed to operate the Northern Detention Area (NDA). The Increment 1 field test was initiated when the stage at G-3273 exceeded 6.8 feet, National Geodectic Vertical Datum (NGVD)1 on October 15, 2016. Prior to Increment 1, the delivery of a net inflow of water to NESRS by S-333 was discontinued (S-333 zero or S-334 must match S-333) when the stage at G-3273 exceeded 6.8 feet, NGVD. Relaxation of G-3273 constraint and operation of S-356 were expected to and did increase water deliveries to NESRS. As a result, reliance on S-334 releases to the SDCS (Column 2 mode of operations) to assist with lowering of stages in Water Conservation Area (WCA) 3A were expected to and did decrease due to: 1) the increased availability to discharge into NESRS, and 2) by the inclusion of new field test criteria restricting when and how S-334 is used to pass S-333 flows during Column 2 operations. The Increment 1 monitoring plan anticipated the potential need for incremental modifications to the operational strategy (within the covered National Environmental Protection Act (NEPA) Environmental Assessment (EA) scope) as a result of the ongoing field test monitoring and technical assessments, with potential updates to be coordinated with the Project Delivery Team (PDT) during regularly-scheduled interagency meetings to occur four times per year. Implementation of the Increment 1 field test occurred from October 15, 2015 to December 1, 2015 after which the Corps proceeded with pre-storm drawdown and flood control operations due to very strong El Niño conditions experienced in the WCAs during the 2015-2016 dry season. The pre-storm drawdown and flood control operations were conducted in accordance with the 2012 Water Control Plan, independent of the Increment 1 field test. At the request of the South Florida Water Management District (SFWMD), the Corps initiated a temporary emergency deviation to the Increment 1 stage maximum operating limit of 7.5 feet, NGVD in the L-29 Canal for purposes of providing high water relief in WCA 3A on February 15, 2016 (hereafter referred to as the 2016 Temporary Emergency Deviation). Upon review of monitoring data associated with Increment 1 and the 2016 Temporary Emergency Deviation, it became apparent that modifications are necessary to the Increment 1 Operational Strategy to maintain the Congressionally-authorized flood mitigation requirements within the 8.5 Square Mile Area (SMA) and to facilitate completion of the C-111 South Dade Project’s ongoing construction necessary for Increment 2 of the field test. Furthermore, the Corps is proposing to include additional operational flexibility within the revised operational strategy for Increment 1 Plus (hereafter referred to as Increment 1.1/1.2) to operate the L-29 Canal to a maximum of 7.8 feet, NGVD, subject to downstream constraints. Increment 1.1 of the operational strategy will maintain the L-29 Canal stage maximum operating limit of 7.5 feet, NGVD. Increment 1.2 will increase the L-29 Canal stage maximum operating limit up to 7.8 feet, NGVD. The Corps is also proposing to modify the Increment 1 operational strategy to address the mandated terms and conditions of the U.S. Fish and Wildlife Services (USFWS) July 22, 2016 ERTP Biological Opinion (BO), which includes expanded closure periods for S-12A, S-12B, S-343A, S-343B, and S-344 as mandated by the Reasonable and Prudent Alternative (RPA) identified within the BO. A Supplemental Environmental Assessment (EA) for the “G-3273 Constraint Relaxation/S-356 Field Test and S-357N Revised Operational Strategy: Increment 1 Plus (Increment 1.1 and Increment 1.2)” accompanies this Operational Strategy to provide documentation of the environmental effects resulting from the implementation of these changes to the Increment 1 Operational Strategy. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | United States. Army. Corps of Engineers. Jacksonville District. | en_US |
| dc.subject | Flood control | en_US |
| dc.subject | Environmental protection | en_US |
| dc.subject | Hydrology | en_US |
| dc.subject | Everglades (Fla.) | en_US |
| dc.title | G-3273 Constraint Relaxation/S-356 Field Test and S-357N Revised Operational Strategy: Increment 1 plus (Increment 1.1 and 1.2) : Appendix A, Operational Strategy | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Environmental Documents | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Appendix A Operational Strategy Inc 1 Plus FINAL 17_0207.pdf | 2.91 MB | Adobe PDF |  View/Open |