An interim progress report to the Bourne Sewer Commissioners
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Transcript of An interim progress report to the Bourne Sewer Commissioners
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
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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
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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
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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
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Buzzards Bay Water Assessment
(Over 4 yrs.)
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•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
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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.
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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
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ASSESS EXISTING WASTEWATER INFRASTRUCTURE
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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
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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
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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
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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
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Buzzard Bay Downtown Buzzard Bay Downtown District (DTD)District (DTD)
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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
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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
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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