Transcript 2010 1116 BWMP Presentation

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
2010 Average Daily Pumping Rate by Month
4-Year Annual
Daily Average
470,000 GPD
800,000
600,000
400,000
200,000
0
Well #4
Well#3
Well#2
Well#1
Ja
nu
Fe ary
br
ua
r
M y
ar
ch
Ap
ril
M
ay
Ju
ne
Ju
Au ly
Se gu
pt
s
em t
b
O er
c
N t ob
ov e
em r
D
ec ber
em
be
r
GPD
1,000,000
• Pumps all working at equal levels
• Current pumps meet current needs
• There are no connections with other Districts for back-up supply.
Sub-task 3c: Projected future supply
needs for Tech Park and GIZ – Phase 1
Development
Average gpd
Peak gpd
Bourne Tech Park
24,000
47,500
Growth Incentive
Zone (GIZ)
31,500
63,000
(Approx 250K SF)
55,500
TOTAL
December | 6 | 2011
Buzzards Bay Water Assessment
1000000
900000
800000
700000
Permitted Water Use
600000
500000
Existing Average Water Use
(Over 4 yrs.)
400000
Existing Average + Phase 1
GIZ/Tech Park
300000
200000
100000
0
Average GPD
December | 6 | 2011
Task 3 – Potential
Recommendation
•Based 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
locations
•Factors to consider:
–
–
–
–
Open space allowance for water supply purposes
Test Well Investigation
DEP New Source Approval
Water Management Act Permit
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.
• 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 PlymouthCarver-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
Bourne Average Daily
Wastewater Pumping
120,000
Gallons/Day
100,000
80,000
60,000
Main Street
Hideaway
Village
Total
40,000
20,000
0
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 Allocation
•
•
•
•
Allocation allowed by permit
Board of Sewer Commissioners approves permit
One extension of permit is allowed
Currently one allocation permit is granted
(23,000 GPD to Optimus Senior Living)
• Allocations 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:
–
–
–
–
–
Theoretical development scenario
Snap shot of development potential under zoning
Involves flexible assumptions
Maximized development scenario
Community visioning tool
• What it isn’t:
– Actual future development
– Parcel by parcel analysis
December | 6 | 2011
Buzzard Bay Downtown District
(DTD)
Downtown Gateway (DTG)
Downtown Neighborhood (DTN)
Downtown Core (DTC)
Downtown Waterfront (DTW)
December | 6 | 2011
Build-out Data & Assumptions
• Input assessors data (2006)
By right:
– 4 stories
• Overlaid DTD form based code (zoning)
– 80% lot coverage
• Removed open space,
– Parking req. by
municipal uses & wetlands
use
• Overlaid FEMA floodplain
• Assumed mix of uses:
– 40% Commercial, 60% Residential (DTG & DTC)
– 30% Commercial, 70% Residential (DTW)
•
•
•
•
•
•
Restaurant
Office
Retail
Hotel
Institutional
Consumer Services
December | 6 | 2011
BFDC & Hideaway Build-out
BFDC
Commercial (SF)
Storage (SF)
Office (SF)
Industrial (SF)
Total (SF)
WW Flows
T& B Concept MP Revised (2011)
125,000
12,500
50,000
62,500
250,000
47,500 GPD
Hideaway Village
269 Units
20,000 GDP
Total WW Flows (GPD)
67,500 GPD
December | 6 | 2011
Build-out Development Potential
Theoretical vs. Practical
DTD Theoretical Build-out
Build-out (SF)
Residential (units)*
Commercial (SF)
DTD
Theoretical
DTD
Theoretical
WW Flow (GPD)
1,803 Units
396,660 GPD
3,244,928 SF
943,408 GDP
TOTAL
1.3 million GPD
DTD Practical Build-out (20% of Theoretical)
Build-out (SF)
Residential (units)*
Total commercial (SF)
TOTAL
DTD
Theoretical
WW Flow (GPD)
DTD
Practical
360 Units
79,332 GPD
648,986 SF
188,682 GDP
268,000 GPD
December | 6 | 2011
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