Rockland County Water: Alternatives for Supplying Demand<br />Sally Haas<br />LAI531<br />April 18, 2010<br />
Rockland County<br /><ul><li>Population: 298,545
Number of Housing Units: 99,324
Land Area: 174.22 square miles</li></ul>Hudson River<br />
Rockland Water Supply<br />Rockland County Water Supply Sources<br />United Water NY 90% <br />Small Water Companies 7% <b...
Groundwater supplies 61% percent of the drinking water to Rockland County. This come from wells located in the southern 2/...
Water Supply<br />Peak Supply is the volume available over a few days<br />Rockland County peak supply capacity is 44.5MGD...
Supply and Demand<br />2006 Average sustainable supply 32-34MGD<br />Peak supply 44.5 MGD with 3 MGD available<br />Actual...
Other Potential Sources of Water<br />A new reservoir at Ambrey Pond<br />Desalination of brackish Hudson River water<br /...
Short-term Projects<br />Update Letchworth Water Treatment Plant- 2MGD<br />Sparkill Well Field Clean-up- 0.5 MGD<br />New...
Conservation Measures<br />Limiting Demand by Conservation is desirable<br />Can’t be counted on<br />Can’t be legislated<...
Desalinate Hudson River Water<br />In September 2007 United Water submitted a proposal to build a pilot desalinating plant...
The Salinity Gradient<br />The table on the right shows salinity data in parts per million (ppm) for various points along ...
Factors Affecting the Salinity<br />Salinity fluctuates with the tidal cycle; peaking with high tide, dropping at low tide...
<ul><li>The location of the Salt Front (salinity 100 ppm ) in Mar-Apr and Aug-Sept measured by the US Geological Survey sh...
Salinity of 100 ppm is considered drinkable
Rockland County is located between RM 23 to 45. </li></li></ul><li>Desalination<br />Using a process similar to dialysis, ...
Costs for Reverse Osmosis Desalinator<br />Capital costs<br />Membrane life<br />Energy for desalination process<br />Chem...
The proposed plant will cost between $80 and $100 million<br />Energy consumption:<br />4427-6520 kilowatt hr/million gal....
Haverstraw Site<br />The proposed site in Haverstraw is unused land owned by US Gypsum (produce wallboard and construction...
Working Desalinators Worldwide<br />Majority and largest are in the Middle East and North Africa<br />The largest is in Is...
Benefits of Desalinator<br />On December 14, 2006, the New York Public Service Commission granted United Water New York pe...
Impressions<br />Need to increase supply<br />Desalinator to supply 2 MGD by 2015 increasing in phases to 7 MGD <br />Curr...
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Rockland county water sah

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Desalinator proposed for Rockland County

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Rockland county water sah

  1. 1. Rockland County Water: Alternatives for Supplying Demand<br />Sally Haas<br />LAI531<br />April 18, 2010<br />
  2. 2. Rockland County<br /><ul><li>Population: 298,545
  3. 3. Number of Housing Units: 99,324
  4. 4. Land Area: 174.22 square miles</li></ul>Hudson River<br />
  5. 5. Rockland Water Supply<br />Rockland County Water Supply Sources<br />United Water NY 90% <br />Small Water Companies 7% <br />Private Wells (6,000 - 8,000) 3%<br />United Water NY Water Supply Sources <br />Lake DeForest 37% <br />Alluvial well fields (includes Ramapo and Mahwah Valley well fields) 31% <br />Bedrock wells 32%<br />Lake DeForest<br />
  6. 6. Groundwater supplies 61% percent of the drinking water to Rockland County. This come from wells located in the southern 2/3rds of the county<br />Surface water supplies 39% percent of the drinking water to Rockland County including Lake DeForest, the Hackensack River and the Mahwah River. <br />
  7. 7. Water Supply<br />Peak Supply is the volume available over a few days<br />Rockland County peak supply capacity is 44.5MGD (million gallons per day) with an additional 3MGD possible<br />2006 Average sustainable supply was 32-34MGD<br />Factors limiting supply:<br />Close spacing of production wells<br />NYSDEC limit allocation permits<br />De Forest Lake withdrawal limits and treatment capacity<br />Periods of low precipitation<br />Development (sewage treatment and storm drainage) decreases recharge <br />
  8. 8. Supply and Demand<br />2006 Average sustainable supply 32-34MGD<br />Peak supply 44.5 MGD with 3 MGD available<br />Actual average daily demand for 2005 was 31.06 MGD<br />2010 estimated daily demand- over 33 MGD with summer peak of 49MGD.<br />
  9. 9. Other Potential Sources of Water<br />A new reservoir at Ambrey Pond<br />Desalination of brackish Hudson River water<br />Additional groundwater supplies<br />Reuse of wastewater<br />Increased use of Lake DeForest<br />Use of the Suffern Quarry.<br />
  10. 10. Short-term Projects<br />Update Letchworth Water Treatment Plant- 2MGD<br />Sparkill Well Field Clean-up- 0.5 MGD<br />New wells from purchase of existing private wells-1-1.5 MGD<br />Divert water from Potake Pond to Ramapo River to maintain levels in dry conditions<br />Store Lake DeForest spill during wet conditions<br />Reservoir at Ambry Pond-NYS has not permitted new damn<br />Divert flood waters from Ramapo River to Suffern Quarry-not pursued. <br />
  11. 11. Conservation Measures<br />Limiting Demand by Conservation is desirable<br />Can’t be counted on<br />Can’t be legislated<br />Limiting development-non adherence<br />Personal efforts<br />Fix leaks<br />Low volume toilets and restrictive shower heads<br />Low capacity washer and dishwasher<br />Limit use-turn off faucets<br />
  12. 12. Desalinate Hudson River Water<br />In September 2007 United Water submitted a proposal to build a pilot desalinating plant to be built in Haverstraw, NY. <br />
  13. 13. The Salinity Gradient<br />The table on the right shows salinity data in parts per million (ppm) for various points along the river measured on Oct 12, 2006.<br />4 Points and their salinities are illustrated on the map.<br />Haverstraw is marked.100 ppm is considered drinkable.<br />Mile 55 80<br />Mile 40 1600<br />X<br />Mile 25 5180<br />Mile 0 26,000<br />
  14. 14. Factors Affecting the Salinity<br />Salinity fluctuates with the tidal cycle; peaking with high tide, dropping at low tide<br />Precipitation<br />Rainfall has a strong and delayed affect on salinity<br />Data from Beczak Environmental, Yonkers, NY; River Mile 18<br />
  15. 15. <ul><li>The location of the Salt Front (salinity 100 ppm ) in Mar-Apr and Aug-Sept measured by the US Geological Survey shows seasonal variation in the location of the Salt Front.
  16. 16. Salinity of 100 ppm is considered drinkable
  17. 17. Rockland County is located between RM 23 to 45. </li></li></ul><li>Desalination<br />Using a process similar to dialysis, water is forced through a fine membrane leaving the salts and other impurities behind<br />Click to play video on how desalination works<br />Bear with the commercial and manually return to the presentation when you are finished.<br />
  18. 18. Costs for Reverse Osmosis Desalinator<br />Capital costs<br />Membrane life<br />Energy for desalination process<br />Chemicals treatments through out the process<br />Distribution<br />Packaging and transportation<br />Or infrastructure<br />Waste disposal<br />
  19. 19. The proposed plant will cost between $80 and $100 million<br />Energy consumption:<br />4427-6520 kilowatt hr/million gal.<br />Compared with 250-3500 kWh/Mg for traditional treatment facilities<br />Estimated initial production 1.5 mgd<br />Need distribution to existing infrastructure<br />Waste to be processed through the Joint Regional Sewage Treatment facility<br />Based on video There is 30% recovery of intake. The rest is processed as waste. <br />Haverstraw Project<br />
  20. 20. Haverstraw Site<br />The proposed site in Haverstraw is unused land owned by US Gypsum (produce wallboard and construction products)<br />Located across from Indian Point Nuclear Power Plant<br />Potentially radioactive contaminants not removed by desalinator<br />Towns of Ramapo and Stony Point have passed resolutions opposing desalination facility due to proximity to Indian Point and costs. <br />Not likely to run full-time only during low tide-related low salinity<br />More efficient, more costly not running at capacity<br />No mention of renewable energy sources like solar or wind<br />Some high salt waste water will backwash into the Hudson bringing other concentrated contaminants (PCBs)<br />
  21. 21. Working Desalinators Worldwide<br />Majority and largest are in the Middle East and North Africa<br />The largest is in Israel <br />Evaporation or distillation most common method<br />There are 18 in the US<br />California, Texas, Arizona, and Florida<br />Reverse Osmosis most common<br />February 2010: Solar panals for Swansea, MA plant to provide 1/6th-1/4th of energy <br />Australia is the only one using energy from a renewable source<br />
  22. 22. Benefits of Desalinator<br />On December 14, 2006, the New York Public Service Commission granted United Water New York permission to raise its rates for three years in a row, starting with a 23% hike in 2007.<br />UWNY charged with plan for sustainable solution resulting in proposal for Haverstraw desalinator in January 2007.<br />Benefits cited over developing reservoir at Ambrey Pond include: drought tolerance; perceived dam safety concerns from local neighbors; plant expandability; permitting requirements; complexity of construction; and cost.<br />
  23. 23. Impressions<br />Need to increase supply<br />Desalinator to supply 2 MGD by 2015 increasing in phases to 7 MGD <br />Current peak demand is 49 MGD<br />Are there other alternatives that have not been considered or have been prematurely discounted?<br />Withdraw further up river closer to salt front<br />Ambry pond and Suffern Quarry<br />
  24. 24. Future for Desalinator<br />Technology should be developed<br />Improvements to decrease costs<br />Sustainable energy<br />Waste utilization<br />
  25. 25. Water Policy and the Public<br />United Water has filed the proposal with the State<br />A number of Town Hall Meeting are to be Scheduled<br />January 12, 2010—No follow-up reports<br />April 22, 2010—Public Hearing on Proposed (21%) Rate Hike<br />Citizen Action Groups: Sustainable Rockland<br />Includes: Sierra Club and Food and Waterwatch<br />Resolutions Opposing Desalinator Project<br />Towns of Stony Point and Ramapo <br />
  26. 26. References<br />Company files plan with new york state public service commission Retrieved 4/19/2010, 2010, from http://haverstrawwatersupplyproject.com/the-news/3-newsflash-2.html <br />Haverstraw water treatment plant - water technology Retrieved 4/19/2010, 2010, from http://www.water-technology.net/projects/haverstraw-treatment/ <br />Hudson river desalination - citizens campaign for the environment Retrieved 4/19/2010, 2010, from http://www.citizenscampaign.org/campaigns/hudson-river-desalination.asp <br />Is the hudson too salty to drink? data puzzle number 4. Retrieved April 18, 2010 <br />New york state | map-NY Retrieved 4/19/2010, 2010, from http://www.nysegov.com/map-NY.cfm?gameMode=on <br />Swansea's desalination plant going green - taunton, MA - the taunton gazette Retrieved 4/19/2010, 2010, from http://www.tauntongazette.com/news/business_news/x1468647563/Swanseas-desalination-plant-going-green <br />United water new York’s proposed desalination plant | riverkeeper Retrieved 4/19/2010, 2010, from http://www.riverkeeper.org/campaigns/river-ecology/waterfront-development-review/united-water-desal/ <br />United water sites long-term water supply project in town of haverstraw Retrieved 4/19/2010, 2010, from http://haverstrawwatersupplyproject.com/the-news/4-united-water-sites-long-term-water-supply-project-in-town-of-haverstraw.html <br />Vanderhoef, S.State of the county address. Retrieved 04/18, 2010, from http://www.co.rockland.ny.us/Executive/Documents/ExecAddress2010.pdf <br />Water supply - desalination Retrieved 4/19/2010, 2010, from http://superfund.ciesin.columbia.edu/Rocklandwater/supply_desal.html <br />Water supply - planning Retrieved 4/19/2010, 2010, from http://superfund.ciesin.columbia.edu/Rocklandwater/supply_planning.html <br />Water supply - planning Retrieved 4/19/2010, 2010, from http://superfund.ciesin.columbia.edu/Rocklandwater/supply_planning.html#shortterm <br />

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