Orange County s s (NY) Approach to System Reliability and Efficiency

Transcription

1 Mid-County Water Feasibility Study: June 2011 Orange County s s (NY) Approach to System Reliability and Efficiency Orange County Planning Department, and Orange County Water Authority; Funded in Part by NYSDOS Shared Muni. Serv. Grant (Project C ) C Copyright 2010 HDR Engineering, Inc. All rights reserved.

2 Acknowledgments This work was funded in part by a Shared Municipal Services Incentive Grant from the NYS Department of State (Project C ) Orange County Planning Department Orange County Water Authority HDR and the Amawalk Consulting Group

3 Presentation Summary General Background Project Objectives Selected Projects for Evaluation Project Assessments: conceptual engineering & probable cost Next Steps

4 General Background - Orange County, N.Y. Population as of 2006: 373,000 people Located 40 miles north of NYC in the mid-hudson River Valley Region Land area comprised of 816 square miles 42 municipalities: 3 cities, 20 towns, and 19 villages Bordered on the east by the Hudson River, on the west by the Delaware River & PA, and on the south by NJ

5 Orange County, NY

6 Orange County Water Resources County Water Supply Capacity: 67.4 mgd Surface Water: 32.8%; Groundwater 55.9%; NYC Aqueducts: 11.2% 75% Public; 25% Private 160 Community Systems 800 Public Supply Wells 12 Public Systems use reservoirs

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8 Water Master Plan Overview Developed between The plan was built on a wealth of existing information previously prepared by the OCWA & others Used a planning horizon of 10 years; with recommendations keyed to one-year, five-year, and ten-year periods- out to 2018 Key elements included: a determination of existing inventories, demand projections with build-out, priority actions & financing Determined short & long-term roles for OCWA, County Departments, municipal partners, etc. Effective in 2010: now used by the OCWA as guide to approaching new projects, operations and day to day functions

9 Water Master Plan Projections Year Pop. people Supply gpd Demand gpd Surplus gpd ,496 47,074,600 29,973,737 17,100, ,408 47,074,600 31,752,898 15,321, ,754 49,758,800 34,146,677 15,612,123

10 Good News & Bad News Good News: The projection is for a 15.6 mgd surplus Countywide in 2018 Bad News: The projected surplus is not distributed equally across the County to the communities that will need it. Some districts have shortfalls now and others are projected to have shortfalls in 2018

11 Water Master Plan: Encouraged Municipal Sharing

12 NYSDOS Shared Municipal Services Grants Functional consolidation, shared services and cooperative agreements are ways that municipalities can achieve efficiencies without fullscale government reorganization. Regional approach to service delivery, municipalities can both save money and provide more effective services A portion of grant funding is directed to sharing water supply across municipal lines Orange County secured a grant in 2009 for the Mid-County Region

13 Mid-Orange County Water Supply Feasibility Study Objectives Identify participating municipalities among the 6 Towns, 4 Villages and 1 City within the region Assess the need for inter-municipal water supply sharing Develop conceptual engineering designs Determine probable cost Investigate financial and inter-municipal arrangements

14 Project Approach Met with all Mid-County municipalities Assessed needs and investigated the potential for shared services and water supply interconnections Selected the five (5) most viable projects Performed the feasibility analysis including conceptual engineering design an probable cost

15 Selected Projects 1. Groundwater Supply & Interconnection at the Orange County Correctional Facility 2. Dwaarkill-Pine Bush (Town of Crawford) Water Supply 3. Groundwater Supply from the Indigot Well Field Town of Wawayanda- City of Middletown 4. Village of Goshen- Town of Wallkill Interconnection 5. Town of Wallkill-City of Middletown Interconnection

16 Keys to Project Success Motivated Municipalities Willingness to enter into Inter-municipal Agreements (IMA s)- Cooperation The existence of viable financing mechanisms Coordination at the County Level Role of the OCWA need for a facilitator

17 Groundwater Supply & Interconnection at the Orange County Correctional Facility Currently receives water from the Village of Florida Propose to use 2 wells on-site to supplement or replace existing supply Projected demand = 225,000 gpd; current = 80,000 gpd Wells will yield 287,000 gpd and will require less treatment

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19 Groundwater Supply & Interconnection at the Orange County Correctional Facility Results & Probable Cost Without treatment, i.e., green sand, cost $0.4M; O&M= $0.1M With treatment, green sand filters & assoc. bldg addition, cost $1.4M; O&M= $0.13 Blending of two sources will require NYSDOH approval Has the potential to supply the Town of Goshen

20 Dwaarkill - Village of Pine Bush (Town of Crawford) Water Supply Village currently uses 200,000 gpd with peak of 370,000 gpd; 5 wells have questionable yield > 200,000 gpd; Village has interest in expanding and\or replacing its current supply County owned Dwaarkill well field (5 wells), located 1.89 miles from Village, has sufficient capacity to supply the Village (640,800 gpd) and meet 2020 demand of 374,400 gpd Water quality and well drawdown testing was performed- quality was found to be high with no evidence of surface water influence. Potential Fe\Mn issues

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22 Dwaarkill- Village of Pine Bush (Town of Crawford) Water Supply - Proposed Project 2 mile, 8 diameter pipeline will connect the well field to the Village s existing distribution system A treatment plant for disinfection and green sand filtration will be located at the well field Each well will require a pump capable of pumping into the common header to the treatment building A spur to the neighboring Village of Walden can also be included for an additional cost

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25 Dwaarkill - Village of Pine Bush (Town of Crawford) Water Supply Probable Cost System Cost: projected to be $5.1M for design & construction O&M = $200K per year Rates: will increase from $4.00 per 1000g to $8.70 per 1000g by lower if more users come on line by 2024 (from 200,000 gpd to 250,000 gpd) Village of Walden spur will cost $6.2M with $50K per year O&M

26 Groundwater Supply from the Indigot Well Field Town of Wawayanda - City of Middletown Both the Town of Wawayanda and the City of Middletown are in need of additional water supply County owned Indigot well field (6 wells), located close to both municipalities, is capable of producing 604, 800 gpd with treatment Wawayanda is seeking 495,000 gpd to meet projected water demand; Middletown is seeking to improve the safe yield of its system Two water supply options were investigated

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28 Groundwater Supply from the Indigot Well Field Town of Wawayanda - City of Middletown: Proposed Projects Option 1 (Wawayanda system): construct a new treatment plant for the Indigot wells with a new distribution system to Route 6 growth area; involves a 7 miles long 12 diameter main; a spur off Route 6 to 17M is included (Town of Goshen) Option 2 (Middletown system) utilizes Middletown s existing infrastructure- no treatment of the groundwater source will be required. Blending of the Indigot groundwater with the City s raw water supply, i.e., Shawangunk Lake, and treat at the City s existing water treatment plant. Water would be conveyed to Wawayanda through the City s distribution system. The Town would need to construct a 3 mile, 12 diameter pipe west along Route 6 to Slate Hill.

29 Alternative Route Location 1

30 Alternative Route Location 2

31 Groundwater Supply from the Indigot Well Field Town of Wawayanda - City of Middletown Probable Cost Option 1 (Wawayanda system) : $22M with $0.58M for annual O&M Option 2 (Middletown system): $10.1M with $0.37M for annual O&M Rate Basis: Assumes Year 1 (2014) demand will be 250,000 gpd and Year 10 (2025) demand will be 500,000 gpd

32 Groundwater Supply from the Indigot Well Field Town of Wawayanda - City of Middletown Probable Water Rates RATES per 1000 gal. INCREASE DEMAND CONSTANT DEMAND RATES for 80,000 gal/yr INCREASE DEMAND CONSTANT DEMAND OPTION 1 Year 1 (2015) $ $ $ 2,151 $ 2,151 Year 10 (2024) $ $ $ 1,163 $ 2,327 OPTION 2 Year 1 (2015) $ $ $ 1,091 $ 1,091 Year 10 (2024) $ 7.52 $ $ 602 $ 1,203

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34 Village of Goshen - Town of Wallkill Interconnection The Village of Goshen has a MGD supply shortfall projected in 2018; the Village has an existing well in the Town of Wallkill that can only be used under emergency conditions The Town of Wallkill is projected to have a 2.7 MGD surplus in 2018 Proposal is to establish an interconnection between one the Town s well fields and neighboring Village infrastructure

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36 Village of Goshen Town of Wallkill Interconnection: Probable Cost Design & Construction of a 500 pipeline extension would cost $0.1M O&M would be $1,490 per year Water treatment associated with blending surface water with groundwater still needs to be assessed

37 Town of Wallkill City of Middletown Interconnections: Probable Cost Design & Construction of all 3 interconnections would cost $0.4M O&M would be $ 4,810 per year Water treatment associated with blending surface water with groundwater still needs to be assessed

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39 Summary Project Capital $ $ O&M $ Rate/1000gal (Year 1) Feasibility (L, M, H) 1. O.C. Correctional Facility $ 1.4 M $ 0.13 NA H 2. Dwaarkill $ 5.1 M $ 0.12 $ 8.70 H 3. Indigot (a) Option 1 $ 22 M $ 0.65 M $ L (b) Option 2 $ 10.1 M $ 0.42 M $ M 4. Wallkill-Goshen $ 0.1 M $ 1,490 NA M 5. Wallkill-Middletown $ 0.4 M $ 4,810 NA M

40 Next Steps Follow up technical studies- mixing, yield studies, basis of design reports Further refine the assessment of environmental & permitting requirements Determine project ownership: County, Town, City, Village, joint Further refine financial analyses Establish Inter-municipal agreements Pursue funding- state\federal

41 Thank You Questions?