Katonah Business Sewer District Map, Plan and Report
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Town of Bedford BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT DRAFT September 2016 BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT Bedford, New York Carolyn A. Lowe, PE Prepared for: Vice President Town of Bedford Bedford Town House 32 Bedford Road Bedford Hills, NY 10507 Prepared by: Arcadis U.S., Inc. 44 South Broadway 15th Floor White Plains New York 10601 Tel 914 694 2100 Fax 914 694 9286 Our Ref.: 04711007.0000 Date: September 2016 This document is intended only for the use of the individual or entity for which it was prepared and may contain information that is privileged, confidential and exempt from disclosure under applicable law. Any dissemination, distribution or copying of this document is strictly prohibited. arcadis.com G:\WHI_ENG\Projects\04711007.0000\Draft Map Plan Report 2016\Bedford Sewer District Map Plan and Report 09 29 16 Revised Draftv2.docx i BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT CONTENTS 1 Introduction .......................................................................................................................................... 1-1 1.1 Environmental Setting .................................................................................................................. 1-2 1.2 Land Use and Zoning ................................................................................................................... 1-3 1.3 Existing Underground Utility Lines ............................................................................................... 1-3 1.4 Existing Water and Wastewater Systems .................................................................................... 1-3 2 Proposed Sewer District Boundaries ................................................................................................... 2-1 2.1 Proposed Sewer District Boundaries ........................................................................................... 2-1 3 Proposed Sewerage Facilities ............................................................................................................. 3-1 3.1 General ........................................................................................................................................ 3-1 3.2 Estimated Wastewater Flows ...................................................................................................... 3-1 3.2.1 First Year of Operation ..................................................................................................... 3-1 3.2.2 Future Flow Allocation ...................................................................................................... 3-2 3.3 Proposed Collection System ........................................................................................................ 3-3 3.4 Existing Wastewater Treatment System ...................................................................................... 3-4 3.4.1 Recommended Wastewater Treatment Plant Improvements .......................................... 3-5 3.4.1.1 Existing Facility Improvements ............................................................................... 3-6 3.4.1.2 Future Process Improvements ............................................................................... 3-6 3.4.2 Decommissioning of Upgrade Sites ................................................................................. 3-7 4 Cost Information ................................................................................................................................... 4-1 4.1 General ........................................................................................................................................ 4-1 4.2 Construction Costs ....................................................................................................................... 4-1 4.3 Project Costs ................................................................................................................................ 4-3 4.4 Operation and Maintenance Costs .............................................................................................. 4-4 4.4.1 New York City Watershed Memorandum of Agreement (MOA) ...................................... 4-6 5 Financing .............................................................................................................................................. 5-1 5.1 Capital Costs ................................................................................................................................ 5-1 5.2 O&M Costs ................................................................................................................................... 5-1 5.3 Typical Customer Cost – First Year of Full Operation ................................................................. 5-1 arcadis.com G:\WHI_ENG\Projects\04711007.0000\Draft Map Plan Report 2016\Bedford Sewer District Map Plan and Report 09 29 16 Revised Draftv2.docx ii BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT TABLES Table 1-1. Existing Facility State Pollution Discharge Elimination System Permits ................................... 1-4 Table 3-1. Total Daily Average Recorded Water Usage and Estimated Wastewater Flow ....................... 3-2 Table 3-2. Allocated, Reserve and Remaining Capacities ......................................................................... 3-2 Table 3-3. Preliminary Design Data for Proposed Wastewater Pumping Stations .................................... 3-4 Table 4-1. Collection System Opinion of Probable Construction Cost ....................................................... 4-2 Table 4-2. Opinion of Probable Project Cost .............................................................................................. 4-4 Table 4-3. Collection System Annual Operation and Maintenance Cost ................................................... 4-5 Table 4-4. WWTP Annual Operation and Maintenance Cost ..................................................................... 4-5 Table 5-1. Anticipated First Year Annual Operations and Maintenance Costs (FY2019) .......................... 5-1 Table 5-2. Summary Allocation of First Year O&M Costs (FY2019) .......................................................... 5-2 Table 5-3. Projected First Year Cost to Each Property Owner (FY2019 Estimate) ................................... 5-3 FIGURES Figure 3-1. Proposed Sewer District Figure 4-1. Proposed Collection System Figure 4-2 Wastewater Treatment Plant Site Plan Figure 4-3 Wastewater Treatment Plant Process Flow Diagram APPENDICES Appendix A – Hamlets of Bedford Hills and Katonah Previous Studies on Wastewater Disposal Issues Appendix B - Bedford Hills Correctional Facility DOCCS Operating Agreement with Veolia Appendix C - Bedford Hills Correctional Facility SPDES Permit NY0101885 (Modified 02/04/2016) Appendix D – Bedford Hills Correctional Facility WWTP Description of Unit Processes Appendix E – Bedford Hills Correctional Facility WWTP Control Building Evaluation Appendix F - Bedford Hills NY WWTP - Review of Temperature and Ammonia Data for Future NY SPDES Limits Appendix G - Guidelines for Abandoning Subsurface Sewage Treatment Systems Appendix H – Northern Westchester Watershed Committee Resolution Appendix I – Draft Term Sheets arcadis.com G:\WHI_ENG\Projects\04711007.0000\Draft Map Plan Report 2016\Bedford Sewer District Map Plan and Report 09 29 16 Revised Draftv2.docx iii BEDFORD HILLS - KATONAH BUSINESS SEWER DISTRICT MAP, PLAN AND REPORT 1 INTRODUCTION The Town of Bedford is proposing the creation of a sewer district comprised principally of the business districts (the CB Central Business zoning district) in the hamlets of Bedford Hills and Katonah. Presently wastewaters in these districts are treated by septic systems and cesspools, many of which are beyond their useful life. Under an agreement in the late 1990s with Northern Westchester municipalities, the New York City Department of Environmental Protection (DEP) established and funded a Water Quality Improvement Program (WQIP) to help finance the cost of wastewater treatment facilities, such as a sewer system. DEP also established a program (Upgrade Program) to upgrade nearby wastewater treatment facilities at Bedford Park Apartments in Bedford Hills (BPA), Katonah Elementary School (KES) and property of St. Mary of the Assumption Church in Katonah (St. Mary’s) (collectively termed the Upgrade Sites). The business districts lie within the Croton Watershed system of New York City’s water supply and are close to the Cross River Reservoir. This focus area has been identified as a Priority Project by the Northern Westchester Watershed Committee (NWWC), who have committed to expend East of Hudson WQIP funds for the creation of this sewer district. In addition to concern regarding treatment of wastewater from these areas, property owners within the proposed district have expressed concern about the vitality of their businesses, given the restrictions and in many instances inability to change or expand uses, such as from a “dry use” to a restaurant. The DEP has stated that change or expansion of use may be possible should a sewer system to be created to serve these areas. It should be noted, however, that the Town’s Zoning Code and sewer system capacity, among other constraints, limit growth. The Westchester County Department of Health issues permits for the construction of new septic