Project Delivery Team Meeting. December 14, Trusted Partners Delivering Value Today for a Better Tomorrow
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1 LOXAHATCHEE RIVER WATERSHED RESTORATION PROJECT Project Delivery Team Meeting December 14, 2016 One of the Last Old Growth Cypress Floodplains in the SE Florida Federally designated as a National Wild and Scenic River, the Loxahatchee River and its watershed are homes to 33 federally threatened and endangered species, 20 federally protected migratory bird species, and 30 additional State s species of concern Trusted Partners Delivering Value Today for a Better Tomorrow Last Large Freshwater Wetland Corridor in Project Area US Army Corps of Engineers Vulnerable estuarine habitats
2 Array of Alternative Plans to be Evaluated Dr Brad Foster 2
3 Review: Plan Formulation DEVELOP BY FLOWWAYS RECOGNIZING INTERDEPENDENCE INTEGRATE OPTIONS ACROSS FLOWWAYS MEASURES COMBINE COMPONENTS COMBINE OPTIONS SCREEN SCREEN COMBINE ALTERNATIVES SCREEN 100 Management Measures screened to 90 Measures combined into 47 Components 18 Options (6 for FW1, 7 for FW2, 5 for FW3) Retained two to three Options per flowway, screened the rest Combined the Options into 13 Alternatives 13 Alternatives screened to 5 Alternatives 3
4 Review: Initial Alternatives The Plan Formulation subteam combined the retained Options into complete Project Alternatives Generally, one option per flowway How the options would work together Match volumes of storage so the total would be able to meet targets at Lainhart Dam Alternatives received during earlier PDT meetings and Plan Formulation subteam meetings Include some distinctly different alternatives 4
5 Review: Screen Alternatives Brought 10 alternatives to the PDT (30 Mar 2016) PDT added Alt 11 and Alt 12 during the discussion Scored all twelve alternative for seven criteria Added and scored a new Alt 13 Selected five alts for detailed analysis (5 Apr 2016) Alternative 1 Alternative 2 Alternative 3 Alternative 4 Alternative 5 1F 2H 3B Kitching Creek Hydration ditch near connection with Kitching Creek Kitching Creek Hydration ditch near connection with Kitching Creek Kitching Creek Hydration ditch near connection with Kitching Creek Kitching Creek Hydration ditch near connection with Kitching Creek Restore natural topography, bridge for partial backfill & relocate southern end of above ground reservoir, inflow pump, partial backfill & relocate southern end of Restore Gulfstream West as Restore Gulfstream West as Beeline, backfill interior canals in Corbett, HSLCD canal, small pump, flow through discharge structure, seepage ctrl (9,500 acft) marsh, discharge structure HSLCD canal, small pump, flow through a Flow through Marsh a Flow through Marsh Natural storage on Mecca pump to protect Caloosa (2.7a, 2.8a, 2.9a) marsh, discharge structure C-18 W storage reservoir Restore Nine Gems (PalMar plug N-S ditches; remove pipes; improve 4 wells, supplement volume of the Restore Nine Gems (PalMar plug N-S ditches; remove pipes; improve Shallow L-8 Basin storage location, size TBD; include pump, channels East) northern berm; construct western berm ASR at C-18 W storage reservoir East) northern berm; construct western berm automate twin 84, improve eastern berm; automate twin 84, improve eastern berm; backfill northern canal; pumps at Thomas backfill northern canal; pumps at Thomas C-51 Reservoir, volume TBD, include pump, Culpepper (and edge of Farm; redirect drainage to north side of Culpepper (and edge of Farm; redirect drainage to north side of channels PalMar) Nine Gems Shallow L-8 Basin storage location, size TBD; include pump, channels PalMar) Nine Gems above ground reservoir, inflow pump, Restore natural topography, bridge for discharge structure, seepage ctrl (9,500 acft) channels Natural storage on Mecca pump to protect Caloosa (2.7a, 2.8a, 2.9a) C-51 Reservoir, volume TBD, include pump, Beeline, backfill interior canals in Corbett, G-160 restore hydroperiod in Lox Slough C-18 W storage reservoir G-161 GWP water to Lox Slough ASR at C-18 W storage 4 wells, supplement volume of the G-160 restore hydroperiod in Lox Slough Shallow L-8 Basin storage location, size TBD; include pump, channels C-51 Reservoir, volume TBD, include pump, GWP triangle ITID WATER MEASURE] Shallow L-8 Basin storage location, size TBD; include pump, channels G-161 GWP water to Lox Slough channels C-51 Reservoir, volume TBD, include pump, channels GWP triangle ITID WATER MEASURE] G-160 restore hydroperiod in Lox Slough G-160 restore hydroperiod in Lox Slough G-161 GWP water to Lox Slough G-161 GWP water to Lox Slough GWP triangle ITID WATER MEASURE] GWP triangle ITID WATER MEASURE] 3E 2B 1F 3B 2B 1F 3E 2H 1F 2B 3B Kitching Creek Hydration ditch near connection with Kitching Creek above ground reservoir, inflow pump, discharge structure, seepage ctrl (9,500 acft) C-18 W storage reservoir 4 wells, supplement volume of the ASR at C-18 W storage reservoir Alternative 6 Alternative 7 Alternative 8 Alternative 9 Alternative 10 1C 2B 3E Kitching Creek Hydration ditch near connection with Kitching Creek Kitching Creek Hydration partial backfill & relocate southern end of Restore Gulfstream West as HSLCD canal, small pump, flow through a Flow through Marsh marsh, discharge structure Natural storage on Mecca Restore Nine Gems (PalMar East) Culpepper (and edge of PalMar) C-18 W storage reservoir ASR at C-18 W storage 3B 2H ditch near connection with Kitching Creek Kitching Creek Hydration Restore natural topography, bridge for Restore Gulfstream West as Beeline, backfill interior canals in Corbett, a Flow through Marsh pump to protect Caloosa (2.7a, 2.8a, 2.9a) plug N-S ditches; remove pipes; improve northern berm; construct western berm G-160 restore hydroperiod in Lox Slough automate twin 84, improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north side of Nine Gems G-161 GWP water to Lox Slough above ground reservoir, inflow pump, discharge structure, seepage ctrl (9,500 acft) GWP triangle ITID WATER MEASURE] 1C 2H ditch near connection with Kitching Creek Kitching Creek Hydration partial backfill & relocate southern end of Restore Gulfstream West as HSLCD canal, small pump, flow through a Flow through Marsh marsh, discharge structure Restore Nine Gems (PalMar plug N-S ditches; remove pipes; improve East) northern berm; construct western berm automate twin 84, improve eastern berm; backfill northern canal; pumps at Thomas Culpepper (and edge of Farm; redirect drainage to north side of PalMar) Nine Gems Restore natural topography, bridge for Beeline, backfill interior canals in Corbett, Natural storage on Mecca pump to protect Caloosa (2.7a, 2.8a, 2.9a) 4 wells, supplement volume of the pump, IDIT to M-canal, to GWP; (scrape in reservoir ITID water to GWP to Lox GWP?) G-160 restore hydroperiod in Lox Slough G-160 restore hydroperiod in Lox Slough G-161 GWP water to Lox Slough G-161 GWP water to Lox Slough GWP triangle ITID WATER MEASURE] pump, IDIT to M-canal, to GWP; (scrape in GWP triangle ITID WATER MEASURE] ITID water to GWP to Lox GWP?) ITID water to GWP to Lox pump, IDIT to M-canal, to GWP; (scrape in GWP?) 3E 1C 3E Restore Nine Gems (PalMar East) Culpepper (and edge of PalMar) ditch near connection with Kitching Creek Kitching Creek Hydration ditch near connection with Kitching Creek partial backfill & relocate southern end of HSLCD canal, small pump, flow through marsh, discharge structure TASK FORCE OPTION plug N-S ditches; remove pipes; improve northern berm; construct western berm automate twin 84, improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north side of Nine Gems TASK FORCE OPTION 3B 5
6 Major Features of the Focused Array of Alternatives Alternative C-51 Res. (yes) L-8 Impoundment (yes) Mecca Impoundment (acre-feet) Mecca Natural Storage ASR (number of wells) FW3 option 2 Y 7, E 5 9, E 10 Y 7,200 3B 12 Y Y Y 3E 13 Y Y 2 3E 6
7 Refinements to Alternatives From Apr 2016 to Nov 2016 Developed additional details for storage facilities, ASRs, conveyance canal dimensions and locations, recommended weir heights and locations, seepage management methods Used to inform modeling team Used to develop cost estimates for construction, operations and maintenance, and real estate 7
8 ALTERNATIVE 2 1. Kitching Creek (Hydration) Spreader canal; weir/plug (Jenkins Ditch) 2. Moonshine Creek (MC) & (GE) (Restoration) Connect HSLCD ditch to MC; clear MC vegetation; weir Gulfstream Ditch; regrade to historic topography 3. (CCC) (Reduce Over-drainage) Replace CCC weir; raise berm at Ranch Colony; automate twin 84 LEGEND ALTERNATIVE PLAN 2 CONTROL STRUCTURE FLOW PUMP STATION FILL EXISTING CANAL CANAL CULVERT ASR FORCEMAIN SEEPAGE BARRIER PLUG IMPROVED BERM 40 cfs? cfs Dec Gulfstream West (Restoration & Reduce Over-drainage) Partial backfill & relocate southern end of HSLCD canal; small pump 8 5. Palmar East (Restoration & Connectivity) Plug ditches; remove pipes; improve northern berm; construct western berm; improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north of Nine Gems 6. C-18W Reservoir (7,200 ac/ft & 2 ASR Wells) Above-ground reservoir; inflow pump; discharge structure; seepage control L-8 Basin Shallow Storage (10,000 ac/ft; includes pumps & channels) FLOWWAYS 8. G-160 Structure (Reduce Over-drainage: improve Hydroperiod in Loxahatchee Slough) 9. G-161 Structure (Connectivity: GWP water to Loxahatchee Slough) 10. GWP Triangle (Connectivity) 8 8
9 ALTERNATIVE 5 1. Kitching Creek (Hydration) Spreader canal; weir/plug (Jenkins Ditch) 2. Moonshine Creek (MC) & (GE) (Restoration) Connect HSLCD ditch to MC; clear MC vegetation; weir Gulfstream Ditch; regrade to historic topography 3. (CCC) (Reduce Over-drainage) Replace CCC weir; raise berm at Ranch Colony; automate twin 84 ALTERNATIVE LEGEND PLAN 2 CONTROL STRUCTURE FLOW PUMP STATION FILL EXISTING CANAL CANAL CULVERT ASR FORCEMAIN SEEPAGE BARRIER PLUG IMPROVED BERM 40 cfs? cfs Dec Gulfstream West (Restoration & Reduce Over-drainage) Partial backfill & relocate southern end of HSLCD canal; small pump 7 5. Palmar East (Restoration & Connectivity) Plug ditches; remove pipes; improve northern berm; construct western berm; improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north of Nine Gems C-18W Reservoir (7,200 ac/ft & 2 ASR Wells) Above-ground reservoir; inflow pump; discharge structure; seepage control 7. G-160 Structure (Reduce Over-drainage: improve Hydroperiod in Loxahatchee Slough) FLOWWAYS 8. G-161 Structure (Connectivity: GWP water to Loxahatchee Slough) 9. GWP Triangle (Connectivity) 9 9
10 ALTERNATIVE Kitching Creek (Hydration) Spreader canal; weir/plug (Jenkins Ditch) 2. Moonshine Creek (MC) & (GE) (Restoration) Connect HSLCD ditch to MC; clear MC vegetation; weir Gulfstream Ditch; regrade to historic topography 3. (CCC) (Reduce Over-drainage) Replace CCC weir; raise berm at Ranch Colony; automate twin 84 ALTERNATIVE LEGEND PLAN 2 CONTROL STRUCTURE FLOW PUMP STATION FILL EXISTING CANAL CANAL CULVERT ASR FORCEMAIN SEEPAGE BARRIER PLUG IMPROVED BERM 40 cfs? Dec C-18W Reservoir (7,200 ac/ft & 2 ASR Wells) Above-ground reservoir; inflow pump; discharge structure; seepage control 5 5. G-160 Structure (Reduce Over-drainage: improve Hydroperiod in Loxahatchee Slough) 6. G-161 Structure (Connectivity): GWP water to Loxahatchee Slough 7. GWP Triangle (Connectivity) C-51 Storage (deep storage) includes pump & channels 9. Force Main (pump and pipeline through Grassy Waters Preserve to connect M- Canal to G-161) 8 9 FLOWWAYS 10 10
11 ALTERNATIVE Kitching Creek (Hydration) Spreader canal; weir/plug (Jenkins Ditch) 2. Moonshine Creek (MC) & (GE) (Restoration) Connect HSLCD ditch to MC; clear MC vegetation; weir Gulfstream Ditch; regrade to historic topography 3. (CCC) (Reduce Over-drainage) Replace CCC weir; raise berm at Ranch Colony; automate twin 84 LEGEND ALTERNATIVE PLAN 2 CONTROL STRUCTURE FLOW PUMP STATION FILL EXISTING CANAL CANAL CULVERT ASR FORCEMAIN SEEPAGE BARRIER PLUG IMPROVED BERM 40 cfs? cfs Dec Gulfstream West (Restoration & Reduce Overdrainage) Partial backfill & relocate southern end of HSLCD canal; small pump 5. Palmar East (Restoration & Connectivity) Plug ditches; remove pipes; improve northern berm; construct western berm; improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north of Nine Gems 6. Natural Storage (C-18W Basin) Restore natural topography; seepage barriers; culverts for Beeline Hwy; backfill interior canals in Corbett 7. L-8 Basin Shallow Storage (5,000 ac/ft; includes pumps & channels) C-51 Storage (deep storage) includes pump & channels 9. G-160 Structure (Reduce Over-drainage: improve Hydroperiod in Loxahatchee Slough) 8 FLOWWAYS G-161 Structure (Connectivity) GWP water to Loxahatchee Slough 11. GWP Triangle (Connectivity) 12. Force Main (pump and pipeline through Grassy Waters Preserve to connect M-Canal to G-161) 11 11
12 ALTERNATIVE Kitching Creek (Hydration) Spreader canal; weir/plug (Jenkins Ditch) 2. Moonshine Creek (MC) & (GE) (Restoration) Connect HSLCD ditch to MC; clear MC vegetation; weir Gulfstream Ditch; regrade to historic topography 3. (CCC) (Reduce Over-drainage) Replace CCC weir; raise berm at Ranch Colony; automate twin 84 ALTERNATIVE LEGEND PLAN 2 CONTROL STRUCTURE FLOW PUMP STATION FILL EXISTING CANAL CANAL CULVERT ASR FORCEMAIN SEEPAGE BARRIER PLUG IMPROVED BERM 40 cfs? cfs Dec Gulfstream West (Restoration & Reduce Over-drainage) Partial backfill & relocate southern end of HSLCD canal; small pump 9 5. Palmar East (Restoration & Connectivity) Plug ditches; remove pipes; improve northern berm; construct western berm; improve eastern berm; backfill northern canal; pumps at Thomas Farm; redirect drainage to north of Nine Gems 6. Natural Storage C-18W (Basin Restoration) Restore natural topography; seepage barriers; culverts for Beeline Hwy; backfill interior canals in Corbett L-8 Basin Shallow Storage (6,500 ac/ft & 4 ASR wells); includes pumps & channels FLOWWAYS 8. G-160 Structure (Reduce Over-drainage: improve Hydroperiod in Loxahatchee Slough) 9. G-161 Structure (Connectivity) GWP water to Loxahatchee Slough 10. GWP Triangle (Connectivity) 12 12
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