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% <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 />
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 />
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 />
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 />
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 />
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 />
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 />
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 />
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 />
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 />
<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.
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 />
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 />
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 />
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 />
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 />
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 />
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 />
Future for Desalinator<br />Technology should be developed<br />Improvements to decrease costs<br />Sustainable energy<br />Waste utilization<br />
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 />
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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