DRAFT for WWAC DiscussionDRAFT for WWAC DiscussionNovember 16,2010November 16,2010

Bourne Wastewater Management Planning:Bourne Wastewater Management Planning:Task 3: Water Supply and Demands Assessment,Task 3: Water Supply and Demands Assessment,

Task 4: Assess Existing Wastewater Infrastructure,Task 4: Assess Existing Wastewater Infrastructure,& Task 5: Develop build-out analysis and wastewater flows& Task 5: Develop build-out analysis and wastewater flows

An interim progress report to the Bourne An interim progress report to the Bourne Sewer CommissionersSewer Commissioners

December | 6 | 2011

Wastewater Management Planning:Wastewater Management Planning:ScheduleSchedule

Why do a water analysis?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 Task 3: Water Supply AssessmentAssessment

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.

2010 Average Daily Pumping Rate by Month

0

200,000

400,000

600,000

800,000

1,000,000

Janu

ary

Febr

uary

Marc

hApr

ilM

ayJu

ne July

Augus

t

Septe

mber

Octob

er

Novem

ber

Decem

ber

GP

D

Well #4

Well#3

Well#2

Well#1

4-Year Annual Daily Average470,000 GPD

Sub-task 3c: Projected future supply needs for Tech Park and GIZ – Phase 1

Development Average gpd Peak gpd

Bourne Tech Park(Approx 250K SF)

24,000 47,500

Growth IncentiveZone (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 Based on the time required to permit a new well, recommendation to Water District new well, recommendation to Water District to seek a new well nowto seek a new well now•Working with Water District to find new Working with Water District to find new well locationswell locations•Factors to consider:Factors to consider:

– Open space allowance for water supply purposesOpen space allowance for water supply purposes– Test Well InvestigationTest Well Investigation– DEP New Source Approval DEP New Source Approval – Water Management Act PermitWater Management Act Permit

Task 3 – Potential Recommendation

December | 6 | 2011

WATER SUPPLY WATER SUPPLY SOLUTIONSSOLUTIONS

November | 22 | 2011

Sub-Task 3d: Review and refinement of screening for potential lands suitable for water supply

• ((PLAAPPLAAP) ) PPriority riority LLands ands AAcquisition cquisition AAssessment ssessment PPlan: a map which looks at priority lan: a map which looks at priority conservation targets to protect water conservation targets to protect water supply resources.supply resources.

• This mapping takes into account both This mapping takes into account both natural and manmade obstacles and natural and manmade obstacles and designates which areas are most suitable designates which areas are most suitable for water supply.for water supply.

December | 6 | 2011

Base MAP of PLAAP Study areas 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 Groundwater Flow and Water Supply AreasAreas

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 Identified Water Supply Protection AreasAreasand Buffersand 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 ObstaclesWater Supply Obstacles

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

Potential Water Supply Potential Water Supply AreasAreas

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

Available 40,000 GPD

December | 6 | 2011

Existing AllocationExisting Allocation

• Allocation allowed by permitAllocation allowed by permit• Board of Sewer Commissioners approves Board of Sewer Commissioners approves

permitpermit• One extension of permit is allowedOne extension of permit is allowed• Currently one allocation permit is granted Currently one allocation permit is granted

(23,000 GPD to Optimus Senior Living)(23,000 GPD to Optimus Senior Living)• Allocations are tracked by the Town of Allocations are tracked by the Town of

Bourne Building/Inspection DepartmentBourne 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 is a Build-Out Analysis?

• What it What it isis::– Theoretical development scenarioTheoretical development scenario– Snap shot of development potential under Snap shot of development potential under

zoningzoning– Involves flexible assumptionsInvolves flexible assumptions– Maximized development scenarioMaximized development scenario– Community visioning toolCommunity visioning tool

• What it What it isn’tisn’t::– Actual future development Actual future development – Parcel by parcel analysisParcel by parcel analysis

December | 6 | 2011

Buzzard Bay Downtown Buzzard Bay Downtown District (DTD)District (DTD)

December | 6 | 2011

Downtown Gateway (DTG) Downtown Core (DTC)Downtown Neighborhood (DTN) Downtown Waterfront (DTW)

Build-out Data & AssumptionsBuild-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, Removed open space,

municipal uses & wetlandsmunicipal uses & wetlands• Overlaid FEMA floodplain Overlaid FEMA floodplain • Assumed mix of uses:Assumed mix of uses:

– 40% Commercial, 60% Residential (DTG & DTC)40% Commercial, 60% Residential (DTG & DTC)– 30% Commercial, 70% Residential (DTW)30% Commercial, 70% Residential (DTW)

• RestaurantRestaurant• OfficeOffice• RetailRetail• HotelHotel• Institutional Institutional • Consumer ServicesConsumer Services December | 6 | 2011

By right:– 4 stories4 stories– 80% lot 80% lot

coveragecoverage– Parking req. by Parking req. by

useuse

BFDC & Hideaway Build-outBFDC & 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 Flows 47,500 GPD

Hideaway Village269 Units 20,000 GDP

Total WW Flows (GPD) 67,500 GPD

December | 6 | 2011

Build-out Development Build-out Development PotentialPotentialTheoretical vs. Practical Theoretical vs. Practical

Build-out (SF)DTD

Practical

DTD Theoretical

WW Flow (GPD)

Residential (units)* 360 Units 79,332 GPD

Total commercial (SF) 648,986 SF 188,682 GDP

TOTAL 268,000 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

TOTAL 1.3 million GPD

DTD Theoretical Build-out

DTD Practical Build-out (20% of Theoretical)

QUESTIONS/COMMENTSQUESTIONS/COMMENTSProject Team

BWACBWACSallie K. Riggs, Chairman

Stanley Andrews Michael BradyWilliam LockeMary Andrews

CCC RESETCCC RESETGlenn Cannon - Director Technical Services

Tom Cambareri - Water Resources Program ManagerTabitha Harkin - Special Projects Coordinator

Sharon Rooney - Chief PlannerRyan Christenberry - Planner IIAnne Reynolds - GIS Manager December | 6 | 2011