DRAFT for WWAC Discussion November 16,2010 Bourne Wastewater Management Planning: Task 3: Water Supply and Demands Assessment, Task 4: Assess Existing Wastewater Infrastructure, & Task 5: Develop build-out analysis and wastewater flows An interim progress report to the Bourne Sewer Commissioners December | 6 | 2011

Wastewater Management Planning: Schedule

Why do a water analysis? Growth opportunity limited without coordinated water supply and wastewater initiatives Opportunity for Town and BB Water District to coordinate water supply and wastewater disposal efforts Understanding need and limitations can inform infrastructure planning goals to promote growth and redevelopment

Task 3: Water Supply Assessment Sub-Tasks: Meet with Buzzards Bay Water District Superintendent Status of current water supply Potential future supply needs Review and refinement of screening for potential lands suitable for water supply December | 6 | 2011

Sub-Task 3a: Meeting with Buzzards Bay Water District Superintendent Discussed infrastructure Received copies of pumping reports from the last 5 years Obtained DEP water supply permit information The Buzzards Bay Water District is currently permitted for 530,000 GPD December | 6 | 2011

Sub-Task 3b: Assess present status of water supply Pumps all working at equal levels Current pumps meet current needs There are no connections with other Districts for back-up supply. 4-Year Annual Daily Average 470,000 GPD

Sub-task 3c: Projected future supply needs for Tech Park and GIZ – Phase 1 DevelopmentAverage gpdPeak gpd Bourne Tech Park (Approx 250K SF) 24,00047,500 Growth Incentive Zone (GIZ) TOTAL 31,500 55,500 63,000 December | 6 | 2011

Buzzards Bay Water Assessment (Over 4 yrs.) December | 6 | 2011

Based on the time required to permit a new well, recommendation to Water District to seek a new well nowBased on the time required to permit a new well, recommendation to Water District to seek a new well now Working with Water District to find new well locationsWorking with Water District to find new well locations Factors to consider:Factors to consider: –Open space allowance for water supply purposes –Test Well Investigation –DEP New Source Approval –Water Management Act Permit Task 3 – Potential Recommendation December | 6 | 2011

WATER SUPPLY SOLUTIONS November | 22 | 2011

Sub-Task 3d: Review and refinement of screening for potential lands suitable for water supply (PLAAP) Priority Lands Acquisition Assessment Plan: a map which looks at priority conservation targets to protect water supply resources.(PLAAP) Priority Lands Acquisition Assessment Plan: a map which looks at priority conservation targets to protect water supply resources. This mapping takes into account both natural and manmade obstacles and designates which areas are most suitable for water supply.This mapping takes into account both natural and manmade obstacles and designates which areas are most suitable for water supply. December | 6 | 2011

Base MAP of PLAAP Study areas Water District boundary derived from: Massachusetts General Law Acts 1951 Chapter 106 Section 1

Groundwater Flow and Water Supply Areas Data sources: “Plymouth Lense water table” and “water table flow direction” are digitized from Figure 12 in the "Hydrogeology and Simulation of Groundwater Flow in the Plymouth- Carver-Kingston-Duxbury Aquifer System, Southeastern Massachusetts" report distributed by the USGS. Public Groundwater sources and supplies data from State of Massachusetts GIS. Vernal Pools and buffers from NHESP

Identified Water Supply Protection Areas and Buffers Includes Zone II sites: Wellhead protection areas or areas of contribution, approved by the MA DEP under a rigorous “new source approval” program. These are the areas of land receiving the rainfall that replenishes the portion of the aquifer from which a well derives its water.

Water Supply Obstacles Additional Data sources: Public Water Supply Zone 2 sites from the State of Massachusetts GIS.

Potential Water Supply Areas

TASK 4 – ASSESS EXISTING WASTEWATER INFRASTRUCTURE Sub-Tasks: Review Inter Municipal Agreement (IMA) Summarize allocation issues Develop outline for allocation tracking December | 6 | 2011

ASSESS EXISTING WASTEWATER INFRASTRUCTURE December | 6 | 2011

ASSESS EXISTING WASTEWATER INFRASTRUCTURE Wastewater Capacity (allocation)200,000 GPD Buzzards Bay (peak season use)-117,000 GPD Hideaway Village (peak season use)-20,000 GPD Optimus Senior Living (allocation)-23,000 GPD Available40,000 GPD December | 6 | 2011

Existing Allocation Allocation allowed by permitAllocation allowed by permit Board of Sewer Commissioners approves permitBoard of Sewer Commissioners approves permit One extension of permit is allowedOne extension of permit is allowed Currently one allocation permit is granted (23,000 GPD to Optimus Senior Living)Currently one allocation permit is granted (23,000 GPD to Optimus Senior Living) Allocations are tracked by the Town of Bourne Building/Inspection DepartmentAllocations are tracked by the Town of Bourne Building/Inspection Department December | 6 | 2011

TASK 5 – BUILD-OUT Sub-Tasks: Identify study area locations – –Buzzards Bay (DTD) – –Bourne Development Campus – –Hideaway Village Compile data and assumptions Develop build-out scenarios – –Existing constraints – –Unlimited infrastructure constraints – –Phased optimized design December | 6 | 2011

What is a Build-Out Analysis? What it is:What it is: –Theoretical development scenario –Snap shot of development potential under zoning –Involves flexible assumptions –Maximized development scenario –Community visioning tool What it isn’t:What it isn’t: –Actual future development –Parcel by parcel analysis December | 6 | 2011

Buzzard Bay Downtown District (DTD) December | 6 | 2011 Downtown Gateway (DTG)Downtown Core (DTC) Downtown Neighborhood (DTN)Downtown Waterfront (DTW)

Build-out Data & Assumptions Input assessors data (2006)Input assessors data (2006) Overlaid DTD form based code (zoning)Overlaid DTD form based code (zoning) Removed open space, municipal uses & wetlandsRemoved open space, municipal uses & wetlands Overlaid FEMA floodplainOverlaid FEMA floodplain Assumed mix of uses:Assumed mix of uses: –40% Commercial, 60% Residential (DTG & DTC) –30% Commercial, 70% Residential (DTW) RestaurantRestaurant OfficeOffice RetailRetail HotelHotel InstitutionalInstitutional Consumer ServicesConsumer Services December | 6 | 2011 By right: –4 stories –80% lot coverage –Parking req. by use

BFDC & Hideaway Build-out BFDC T& B Concept MP Revised (2011) Commercial (SF)125,000 Storage (SF)12,500 Office (SF)50,000 Industrial (SF)62,500 Total (SF)250,000 WW Flows47,500 GPD Hideaway Village 269 Units20,000 GDP Total WW Flows (GPD)67,500 GPD December | 6 | 2011

Build-out Development Potential Theoretical vs. Practical Build-out (SF) DTD Practical DTD Theoretical WW Flow (GPD) Residential (units)*360 Units79,332 GPD Total commercial (SF)648,986 SF188,682 GDP TOTAL268,000 GPD December | 6 | 2011 Build-out (SF) DTD Theoretical DTD Theoretical WW Flow (GPD) Residential (units)*1,803 Units 396,660 GPD Commercial (SF)3,244,928 SF 943,408 GDP TOTAL1.3 million GPD DTD Theoretical Build-out DTD Practical Build-out (20% of Theoretical)

QUESTIONS/COMMENTS QUESTIONS/COMMENTS Project Team BWAC Sallie K. Riggs, Chairman Stanley Andrews Michael Brady William Locke Mary Andrews CCC RESET Glenn Cannon - Director Technical Services Tom Cambareri - Water Resources Program Manager Tabitha Harkin - Special Projects Coordinator Sharon Rooney - Chief Planner Ryan Christenberry - Planner II Anne Reynolds - GIS Manager December | 6 | 2011