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Found inside Page 370Water first flowed in from the Ashokan very accurate and reliable results may be obtained , tunnel on November 22 The turbidity was still 30 p . p . m . made on the dam , the reservoir was filled in the winter at the end of a month exceptionally turbid water from the reservoir into the Lower Esopus through the previously unused release channel, as it alone deemed "necessary;" and WHEREAS. And the high levels of the Ashokan Reservoir worsen flooding from the Lower Esopus during rains, residents say, damaging homes and crops. NYC regularly discharges turbid In 1915 damming of a portion of the creek formed the Ashokan Reservoir splitting the creek into upper (upstream of the reservoir) and lower (downstream of the reservoir) segments. The objectives of this project will be accomplished by collecting discrete SSC and turbidity samples throughout a range in stream discharge conditions and monitoring in situ turbidity at a 15 minute time step during a 5 year period at 8 primary monitoring stations within the upper Esopus Creek watershed. New York City Department of Environmental Protection (Catalum) hearing notice, List of Studies, Reports, EISs Obtained and Considered in Preparing the modification of the CATALUM SPDES Permit DEIS (PDF), Cover Page, Table of Contents and Acronyms (PDF), Sections 1-4 Introduction, Purpose and Need, Proposed Action and Analytical Framework (PDF), Section 6 Proposed Action in lower Esopus Creek (PDF, Section 7.1 Potential Water Resources and Water Quality Impacts and Benefits of the Proposed Action in lower Esopus Creek (PDF), Sections 7.2 through 7.11 Potential Impacts and Benefits of the Proposed Action in lower Esopus Creek (PDF), Section 8 Proposed Action in Kensico Reservoir Study Area (PDF), Sections 9-13 Public Health and Other Impact Categories (PDF), Appendix A Proposed Revised Operating Protocol and Proposed Revised Monitoring Plan (PDF), Appendix B Socioeconomic Survey Questionnaires (PDF), SPDES Permit Fact Sheet - Catskill Aqueduct Influent Chamber NY 026 4652 (PDF), Final Scope for the Modification of the Catalum SPDES Permit, Environmental Impact Statement, CATALUM ENB - Notice of Positive Declaration/Notice of Public Meetings (PDF), CATALUM SPDES Permit Modification Draft Scoping Preamble (PDF), CATALUM SPDES Permit Modification EIS Draft Scope Document (PDF), Environmental Assessment Forms Part 1 (PDF), Environmental Assessment Forms Part 2 (PDF), Environmental Assessment Forms Part 3 (PDF), Response to Comments - Ashokan Order on Consent (PDF), Frequently Asked Questions - Lower Esopus Consent Order (PDF), Order on Consent, Environmental Review and Application to Modify Permit (PDF), Ashokan Order On Consent - 2013 (PDF, 284 KB), FAQ - Lower Esopus Consent Order (PDF, 77 KB) - Oct., 2013. Between 2012 and 2014, 4 reach scale stream restoration projects were completed within the Stony Clove watershed to reduce stream turbidity 1) Stony Clove at Chichester Sites 1-3, 2) Stony Clove at Stony Clove Lane, 3) Stony Clove-Warner Creek Confluence, and 4) Warner Creek Site 5. Implementation of the turbidity control measures analyzed in this DEIS would allow NYCDEP to continue to provide reliable, clean, and safe drinking water while reducing reliance on chemical treatment of the water supply, specifically the use of alum, during episodic turbidity events. This project addresses several of the priorities identified in the Upper Esopus Creek Management Plan including: 1) comprehensive monitoring and surveillance of the Upper Esopus for suspended sediment, 2) information that can be used to protect, restore, enhance, or reduce impairments to aquatic habitat by helping prioritize tributaries for their contributions to suspended sediment loadings and 3) data to aid general non-point source program implementation. The DEIS and draft permit incorporate turbidity control measures, including operation of the Ashokan Reservoir in accordance with the Revised Ashokan Release Protocol, that will help improve water quality, protect critical fish and wildlife habitat in the Ashokan and downstream communities, and continue to provide reliable and clean drinking water. The upper Esopus Creek watershed is approximately 192 mi2 from the source, Winnisook Lake, and the Ashokan Reservoir near Boiceville, NY, (Smith et al. 2008). Despite this additional challenge, th e Citys investment in stream bank restoration and flood resilience upstream of the Ashokan have resulted in decreased turbidity in the If we cant manage heavy silt during rainy seasons, an additional 200 acre reservoir and dam emptying into the same reservoir will not make this management easier. Found inside Page 190The average figures for he year 1920 are given in the following table : Ashokan reservoir outlet Kensico outlet , chlorinatec , , Queens , , Brooklyn Richmond Turbidity . Color . Odor Daily 3 10 ly . Daily 2 8 lv . The Ashokan watershed's drainage basin is 255 miles and includes parts of 11 towns: Denning, Hardenburgh, Hurley, Kingston, Marbletown, Olive, Shandaken and Woodstock in Ulster County; Hunter and Lexington in Greene County, and Middletown in Delaware County. Found inside Page 182PILOT PLANT RESULTS TURBIDITY ( NTU ) Raw Water Average NT Influent Air inlet : SODA ASH SOLIDS TO LAGOON POLYMER were used to artifically increase the raw water turbidity , including bentonite and clay from the Ashokan Reservoir . Develop sediment and/or turbidity (dependent on the variables measured at each station) discharge rating curves for each monitoring location. The New York State Department of Environmental Conservation (DEC) today announced the release of two draft documents related to water releases from New York City's Ashokan Reservoir for public review and comment. The rest of the tributaries fell into two groups: those that produced moderate SSCs and turbidity, and those that produced low SSCs and turbidity. The 5 year monitoring period will allow the USGS to investigate how variations in discharge, season, and antecedent moisture conditions affectSSC and turbidity levels. Please see the List of Studies, Reports, EISs Obtained and Considered in Preparing the modification of the CATALUM SPDES Permit DEIS (PDF). Terrigenous inorganic particles delivered during runoff events cause problems of high turbidity in many lakes and reservoirs. Found inside Page 2732 of " Sursary of Turbidity and Sedisentation Studies " The gajority of the material carried through the tunnel is carried down Esopus Creek and into Ashokan Reservoir due to the small particle size and the relatively high velocities in Terrestrial sources of sediment and turbidity are created when areas of erodible sediments coincide with areas of transport to the stream (Church 2002). Found inside Page 190The average figures for the year 1920 are given in the following table : Ashokan reservoir outlet Kensico outlet , chlorinated , , Queens , , , Brooklyn Richmond Turbidity . Color . Odor . Daily 3 10 lv . Daily 2 8 lv . It comes from the Ice Age deposits of sand and silt. The permit modification proposes turbidity control measures, including operation of the Ashokan Reservoir in accordance with a revised Ashokan Reservoir Release Protocol. Bottom panel is the result when Because in situ turbidity is collected at a 15 minute time interval a well-defined relation between the 2 variables should allow more accurate calculations of suspended sediment loads and yields. 3. Please see the List of Studies, Reports, EISs Obtained and Considered in Preparing the modification of the CATALUM SPDES Permit DEIS (PDF). Found inside Page 190The average figures for the year 1920 are given in the following table : Ashokan reservoir outlet Kensico outlet chlorinatec , Queens , , Brooklyn Richmond Turbidity . Color Odor . Daily 3 10 lv . Daily 2 8 lv . Historically, this large settling capacity has generally been adequate to manage turbidity loadings (see Figure 3-1 ). High magnitude storm flows in the Esopus Creek watershed carry high Excessive turbidity will trigger more frequent service interruptions in the Catskill Aqueduct, fed by the Ashokan Reservoir. Ashokan Reservoir, such as its serving as a drinking water source for nine million people. Nolan said the project as proposed has the potential to stir up turbidity basically suspended solids in the water that are a problem for drinking water resources. She said the Ashokan This project will help to evaluate the effectiveness of stream restoration projects in the Stony Clove watershed and put those results into context within the larger upper Esopus Creek watershed. Water diverted from Schoharie Creek through Shandaken Tunnel (station 01362230) since Feb. 3, 1924, enters Esopus Creek about 12.2 mi upstream from Ashokan Reservoir. Terrigenous inorganic particles delivered during runoff events cause problems of high turbidity in many lakes and reservoirs. The Ashokan Reservoir (/ o k n /; Iroquois for "place of fish") is a reservoir in Ulster County, New York.It is at the eastern end of the Catskill Park, and is one of several in the region created to provide the City of New York with water.It is the city's deepest reservoir at 190 feet (58 m) near the dam at the former site of Bishop Falls. Estimate suspended sediment loads and yields at 8 locations within the upper Esopus Creek watershed. 026 4652). (Turbidity is considered a Top panel shows the result for simulations where turbidity from Ashokan Reservoir watershed sources and the Shandaken Tunnel are input to the simulation. Found inside Page 462 yet it was brought out in the hearing before Mr. Mitchel that the completion of the Ashokan Dam and the Catskill In this manner for a number of years the low levels in the reservoir , which cause turbidity , will be prevented . Found inside Page 82It is interesting to watch the clearly defined line between the turbid water and clear water in the Ashokan reservoir , when heavy stream flows are washing clay and silt into the head waters of the reservoirs , but usually this material DEC, as lead agency, has released for public review and comment the Draft Environmental Impact Statement (DEIS) evaluating the proposed modification to the NYSDEC State Pollutant Discharge Elimination System (SPDES) Permit for the Catskill Influent Chamber (Catalum SPDES Permit No. Issue of turbidity in the Ashokan Reservoir watershed. Contact: Kristen Cady-Poulin, NYSDEC, Division of Environmental Permits, 625 Broadway, 4th Floor, Albany, NY 12233-1750, Phone: (518) 402-9167, E-mail: Ashokan@dec.ny.gov or DEPpermitting@dec.ny.gov. The project will also address the two major water quality impairments identified in the upper Esopus Creek watershed, turbidity and sedimentation within the Ashokan Reservoir watershed (CCE 2007). The water flows down the Shandaken Tunnel prior to depositing into the western and eastern catch basins of the Ashokan Reservoir. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data. It is carried southeast under the Hudson River via the 92-mile Catskill Aqueduct, which has a maximum depth of 1,114 feet. The Ashokan Reservoir watershed is 255 mi2 and is one of two reservoirs in the New York City Catskill Reservoir system and one of six reservoirs in the West-of-Hudson Catskill-Delaware system. County, NY, Sullivan County, NY, Ulster County, NY. Found inside Page 7Progress Contractor's forces Camps Geological conditions Plant Power Quarries Sand pits Dam , dike and spillway Contract 193 Constructing guide walls , etc. , at the Ashokan spillway General work Catskill Mountain water supply . Show abstract. Turbidity from suspended sediment entrained during stream-channel The New York City Department of Environmental Protection (DEP) and the U.S. Geological Survey (USGS) today announced that a new stream gauge was installed this month along the lower Esopus Creek at Lomontville, roughly 6 miles below Ashokan Reservoir. Ashokan Reservoir There was a big push to determine where this turbidity was coming from, Carey says. No data point selected. The draft documents that are available for review and public comment include: The book recommends that New York City place its highest priority on pathogenic microorganisms in the watershed and direct its resources toward improving methods for detecting pathogens, understanding pathogen transport and fate, and The longer data collection period will also allow us to better define the relation between suspended sediment and in situ turbidity. In November 2015, New York City Department of Environmental Protection (NYCDEP) submitted a proposal to the New York State Department of Health (NYSDOH) and the United States Environmental Protection Agency (EPA) (FAD regulatory agencies) outlining a set of studies covering a 10 year time period that will satisfy the FAD requirements (NYCDEP, 2015). Within those two groups the tributary that produced the highest SSCs and turbidity varied from year to year depending on the hydrologic conditions within each tributary watershed. Found inside Page 207There is always enough organic matter present in a reservoir to bring about this condition , except in large and turbid , and where the turbidity of finely divided clay contains a considerable percentage of iron , this source is Found inside Page 31Coagulant being used to reduce turbidity in New York water . Engin . News - Rec . , vol . 98 , no . 3 , p . 112 , Jan. 20 , 1927 . Considers the turbidity of water in Ashokan Reservoir , Catskill Mountains , N. Y. , part of the New York The DEIS and draft permit incorporate turbidity control measures, including operation of the Ashokan Reservoir in accordance with the Revised Ashokan Release Protocol, that will help improve water quality, protect critical fish and wildlife habitat in the Ashokan and downstream communities, and continue to provide reliable and clean drinking water. Found inside Page 178Reconnaissance surveys of these water - sheds were first made to develop points affecting the Ashokan Reservoir . Color and turbidity examinations have been made of the water in the main streams of the four water - sheds . For Release: Wednesday, December 16, 2020. clay deposits prevalent in the Ashokan Reservoir, as reported in your 2018 Watershed Water Quality Annual Report, puts Ulster County in a unique and compromised position. This project will address requirements in the NYCDEP proposal to fulfill the water quality study objectives in Section 4.6 of the 2007 Filtration Avoidance Determination; specifically, to monitor suspended sediment and turbidity levels within the upper Esopus Creek watershed and its tributaries, characterize SSC and turbidity through a range in discharge at each monitoring station, and provide data to inform stream management strategies. Up to 40 percent of the drinking water in New York Citys system passes through the Ashokan, and turbidity is expected to be a growing challenge with climate change. Of years the low levels in the Ashokan Reservoir there was a big to. 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