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
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Sewer vs non-sewer
Local vs regional
Centralized vs decentralized
Wastewater composition
 Project stakeholders
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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
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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
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Define sewer service area
Allocate wastewater capacity
Consider zoning restrictions
Develop sewer use regulations
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QUESTIONS?