CAWPCA Fall Meeting November 1, 2013

Sewers vs. Sewer Avoidance:The Old Lyme Story

Bonnie Reemsnyder, First SelectwomanTown of Old Lyme

Dave Prickett, PE, Vice PresidentWoodard & Curran

Sewers vs. Sewer Avoidance:The Old Lyme Story

Bonnie Reemsnyder, First SelectwomanTown of Old Lyme

Dave Prickett, PE, Vice PresidentWoodard & Curran

CAWPCA Fall MeetingNovember 1, 2013

OUTLINE

• The Old Lyme Story• Planning Overview• Key Observations

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THE OLD LYME STORY

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PLANNING OVERVIEW

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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

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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 Solutions9

Year-Round Disposal/Reuse Solutions10

Capital Disposal Capacity

Range GPDPrimary Sub-Surface Disposal Site $1,976,000 190,000Post EQ $1,500,000 n/aStorage Pond for Reuse $680,000 n/aDistribution System at Reuse Site $650,000 235,000Pump Station To Reuse Site $500,000 n/aAdditional Sub-Surface Disposal at Reuse Site $2,600,000 100,000

Totals $8,781,000 525,000

Disposal and Reuse Cost Summary (Local Alternative)

Local Alternative - Treatment Reuse requires higher level of treatment 2-3 acre site

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Local Alternative Summary12

Common SewerIn Old Lyme

New/Local WPCFIn Old Lyme

Sub-Surface DisposalIn Old Lyme

ReuseIn Old Lyme

Neighborhood Sewers inSub-Areas 2 & 5-8

Regional Alternative – Collection

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Regional Alternative Summary14

Neighborhood Sewers inSub-Areas 2 & 5-8

Common SewerIn Old Lyme

Common Sewer/PSsIn East Lyme

Common Sewer/PSIn Waterford

Capacity Buy-In forNew London WPCF

Upgrades to New London WPCF

Comparison of Alternatives

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Local 1 Regional Local 1 Regional Collection $31,100,000 $49,333,000 $192,000 $573,000Treatment $13,490,000 $8,145,000 $406,000 $245,400

Disposal / Reuse $8,781,000 n/a $119,000 n/aTotals $53,371,000 $57,478,000 $717,000 $818,400

Capital Annual O&M

Total Capital and Annual O&M Costs

System Component

Recommended Plan

Strong local support expressed by WPCA and Selectmen Control & Flexibility

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Annualized Capital Annual O&M

Total Annual Cost

Total Annual Cost per EDU

Annualized Capital Annual O&M

Total Annual Cost

Total Annual Cost per EDU

Collection $1,416,000 $192,000 $1,608,000 $1,192 $2,246,250 $573,000 $2,819,250 $2,090Treatment $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 $0Totals $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

Total Annualized Costs (25% Grant, 2% Loan)

System Component

Local Alternative Regional Alternative

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

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Collection System Options Impact Treatment and Disposal Alternatives

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Capital Annual O&M Capital Annual O&MGravity $31,100,000 $192,000 $49,333,000 $573,000

Low Pressure $34,100,000 $214,000 $46,058,000 $519,000Vacuum n/a n/a n/a n/a

STEP $43,200,000 $430,000 $55,158,000 $519,000STEG $40,100,000 $383,000 $52,058,000 $573,000

Local Alternative Regional Alternative

Collection System Cost Summary

Collection System Type

Capital Cost Annual O&M Cost Capital Cost Annual O&M Cost

Gravity $13,490,000 $406,000 $8,145,000 $245,400Low Pressure $12,950,400 $390,000 $8,145,000 $222,300

STEP $11,655,360 $368,640 $8,145,000 $222,300STEG $12,141,000 $384,000 $8,145,000 $245,400

Treatment Cost Summary

Treatment System Based on Type of

Sewer System

Local Alternative Regional Alternative

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?

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