The Old Lyme Story
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Transcript The Old Lyme Story
Sewers vs. Sewer Avoidance:
The Old Lyme Story
Bonnie Reemsnyder, First Selectwoman
Town of Old Lyme
Dave Prickett, PE, Vice President
Woodard & Curran
CAWPCA Fall Meeting
November 1, 2013
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OUTLINE
• The Old Lyme Story
• Planning Overview
• Key Observations
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THE OLD LYME STORY
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PLANNING OVERVIEW
Goals and Key Tasks
Project area as a whole
Evaluate needs
On-site soils/groundwater
testing Develop and
evaluate local and regional
alternatives
Public participation program
Prepare recommended plan
for WPCA
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Needs Analysis
Drivers include lot size, water service, soil and
groundwater conditions, and natural resources
90% of Project Area flows in 5 of the sub-areas
comprising service area
Local Alternative - Disposal and Reuse
Flows
Average
Max Day
Testing overview
Soils
Groundwater
Mounding analysis
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Year-Round Disposal/Reuse Needs
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Year-Round Disposal/Reuse Solutions
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Year-Round Disposal/Reuse Solutions
Disposal and Reuse Cost Summary (Local Alternative)
Capital
Primary Sub-Surface Disposal Site
Post EQ
Storage Pond for Reuse
Distribution System at Reuse Site
Pump Station To Reuse Site
Additional Sub-Surface Disposal at Reuse Site
Totals
$1,976,000
$1,500,000
$680,000
$650,000
$500,000
$2,600,000
$8,781,000
Disposal Capacity
Range GPD
190,000
n/a
n/a
235,000
n/a
100,000
525,000
Local Alternative - Treatment
Reuse requires higher level of treatment
2-3 acre site
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Local Alternative Summary
Sub-Surface Disposal
In Old Lyme
Reuse
In Old Lyme
New/Local WPCF
In Old Lyme
Common Sewer
In Old Lyme
Neighborhood Sewers in
Sub-Areas 2 & 5-8
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Regional Alternative – Collection
Regional Alternative Summary
Upgrades to
New London WPCF
Capacity Buy-In for
New London WPCF
Common Sewer/PS
In Waterford
Common Sewer
In Old Lyme
Neighborhood Sewers in
Sub-Areas 2 & 5-8
Common Sewer/PSs
In East Lyme
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Comparison of Alternatives
Total Capital and Annual O&M Costs
Capital
System Component
Collection
Treatment
Disposal / Reuse
Totals
Local 1
$31,100,000
$13,490,000
$8,781,000
$53,371,000
Regional
$49,333,000
$8,145,000
n/a
$57,478,000
Annual O&M
Local 1
Regional
$192,000
$573,000
$406,000
$245,400
$119,000
n/a
$717,000
$818,400
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Recommended Plan
Strong local support expressed by WPCA
and Selectmen
Control & Flexibility
Total Annualized Costs (25% Grant, 2% Loan)
Local Alternative
Regional Alternative
Annualized
Total Annual Total Annual Annualized
Total Annual Total Annual
Capital Annual O&M
Cost
Cost per EDU Capital Annual O&M
Cost
Cost per EDU
System Component
Collection
$1,416,000
$192,000 $1,608,000
$1,192 $2,246,250
$573,000 $2,819,250
$2,090
Treatment
$614,250
$406,000 $1,020,250
$756
$370,500
$245,400
$615,900
$457
Disposal / Reuse
$399,750
$119,000
$518,750
$385
$0
$0
$0
$0
Totals $2,430,000
$717,000 $3,147,000
$2,333 $2,617,000
$818,400 $3,435,150
$2,546
1) Local Based on Gravity System for Service Area
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KEY OBSERVATIONS
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Public Participation Program
Wastewater terminology
Sewer vs non-sewer
Local vs regional
Centralized vs decentralized
Wastewater composition
Project stakeholders
Town/WPCA
Beach communities
Downstream communities
CT-DEEP
Consultants
Collection System Options Impact
Treatment and Disposal Alternatives
Collection System Cost Summary
Collection System
Type
Gravity
Low Pressure
Vacuum
STEP
STEG
Local Alternative
Capital
$31,100,000
$34,100,000
n/a
$43,200,000
$40,100,000
Regional Alternative
Annual O&M
$192,000
$214,000
n/a
$430,000
$383,000
Capital
$49,333,000
$46,058,000
n/a
$55,158,000
$52,058,000
Annual O&M
$573,000
$519,000
n/a
$519,000
$573,000
Treatment Cost Summary
Treatment System
Based on Type of
Sewer System
Gravity
Low Pressure
STEP
STEG
Local Alternative
Capital Cost
$13,490,000
$12,950,400
$11,655,360
$12,141,000
Regional Alternative
Annual O&M Cost
$406,000
$390,000
$368,640
$384,000
Capital Cost
$8,145,000
$8,145,000
$8,145,000
$8,145,000
Annual O&M Cost
$245,400
$222,300
$222,300
$245,400
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Presentation of Costs
Capital
O&M
Annualized
Present Worth
Unit Costs
Cost per EDU
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The Importance of a Reuse Partner…
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Implementation Strategies
With sewers comes sewer sprawl, right?
Similar risk for regional and local alternatives if not
mitigated
Tools
Define sewer service area
Allocate wastewater capacity
Consider zoning restrictions
Develop sewer use regulations
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QUESTIONS?