Beaufort Jasper Water and Sewer Authority - …...Beaufort Jasper Water & SewerAuthority Asset Management Strategy – Phase 1 Engineering Request for Qualifications (RFQ) Addendum

Beaufort Jasper Water & Sewer Authority Asset Management Strategy – Phase 1 Engineering Request for Qualifications (RFQ) Addendum No. 1

1 6/29/2018

Addendum No.1 to:

Engineering Request for Qualifications

BJWSA Project CIP #2189

Asset Management Strategy – Phase I

Posting Date

06/29/18

Purpose

Engineers submitting qualifications for the above-named project shall take note of the following

updates, changes, additions, deletions, clarifications, etc., in the Request for Qualifications, which shall

become a part of and have precedence over anything contrarily shown or described in the Request for

Qualifications, and as such shall be taken into consideration and be included in the Engineers’

Statement of Qualifications. Engineer shall indicate receipt, where appropriate, in the executive

summary.

Questions/Clarifications Requests Received as of COB 6/28/18

Q: Would BJWSA consider making the recently completed Master Plan available publicly for all

submitters?

A: Attached is the executive summary. At this point, we find no benefit to providing the entire

master plan document but the selected asset management consultant will have access to all

required information sources to complete their services once under contract.

Q: Please clarify if the use of the term “linear” restricts this project to just pipeline

infrastructure, or if it also includes associated pumping/booster stations.

A: Yes, this will include pump stations as they are an integral component to the

collection/distribution system.

Q: Would BJWSA consider receiving Statement of Qualifications electronically / via email as

opposed to sending them by mail?

A: Please provide electronic on USB and one hard copy as required in the RFQ for official

consideration.


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Q: Does the 20-page limit on the Qualifications Statement include the cover letter as well as up

to two 11X 17 pages for graphics?

A: Yes, the page limit will apply to all pages that include qualifications information (executive

statement, all applicable informative pages, schedule, resumes, etc.) but not the statement

cover, back or dividing tabs.

Q: Is it acceptable to include the signed statement indicating the content of the Qualifications is

true and accurate in the cover letter?

A: Yes, including this in the executive statement is acceptable as long as the consulting firm

signatory officer signs this statement.

Q: Would BJWSA prefer full resumes for all Key Team members and would those resumes count

towards the 20-page limit?

A: While I’m not sure what you mean by “full resume”, providing resume information that is

applicable to asset management at a minimum is preferred. We’re not necessarily

concerned with experience outside of the RFQ requirements. Yes, the resumes will count

towards the page limit, see response above.

Q: Would BJWSA be okay with respondents putting the resumes in an Appendix section at the

end of our Statement of Qualifications?

A: Yes, just clearly delineate the layout of the statement and where to easily find information

using tabs, table of contents, etc. Again, the resumes will count towards the page limit so

including as an appendix will not relieve the page limit.

Q: Is Lucity used for managing work orders in the plants, in the field or both? Please describe

the level of sophistication to which Lucity is configured and explain whether you believe it is

fully-configured to support your current O&M activities, would require some or a great deal

of work to accommodate current and recommended activities.

A: Lucity is used to manage all work orders to include field and plant operations. For this

project we are focusing on setting up the framework for asset management specifically

related to linear assets. We do not expect to the selected firm to use Lucity other than for

informational purposes.

Q: Does the data gap assessment work include both horizontal and vertical assets? Are assets

stored in an Esri geodatabase or some other GIS application? Are any assets not stored in a

geodatabase, such as only in Lucity? Please provide a list of all the major asset types or

groupings that will be part of the assessment.

A: The data gap analysis is only focused on the horizontal assets, to include sewer pump

stations. No plants, tanks or other vertical assets will be part of this phase. A full list of major

asset types and locations will be provided accordingly to the RFP selected Engineer.


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Q: Is the PIMS solution a commercial-off-the-shelf (COTS) or custom solution? If COTS, who is

the developer of the software? Please describe the functionality offered by the solution.

A: PIMS is a custom solution developed by Jacobs Engineering, as with Lucity, we do not expect

the selected firm to use PIMS other than for information purposes.

Q: Regarding the page limit, is it acceptable to include brief team member bios within the 20-

pages and more comprehensive resumes in an appendix, making the complete submittal

slightly longer than 20 pages?

A: The page limits is 20, to include cover letters, appendices and any maps, attachments or

informational pages. Cover, back and divider tabs will not be counted towards the page

limit.

Q: Would the Beaufort-Jasper Water and Sewer Authority grant a one-week deadline

extension?

A: No, please follow the schedule as listed in the RFQ.

Q: Is the executive summary included in the 20-page limit?

A: Yes. Only the cover, back and dividing tabs will not be counted towards the page limit.

ATTACHMENTS

BJWSA Water & Wastewater Master Plan Update – Executive Summary

- END OF ADDENDUM -

FINAL

BJWSA WATER & WASTEWATER MASTER PLAN UPDATE Executive Summary

B&V PROJECT NO. 192351

BJWSA PO NO. 20160804

CIP NO. 1531

PREPARED FOR

Beaufort ‐ Jasper Water & Sewer Authority

MAY 2017

Black & Veatch Corporation 550 King Street, Suite 400 Charleston, SC 29403 ®

®

BJWSA Water & Wastewater Master Plan Update | EXECUTIVE SUMMARY

BLACK & VEATCH | Document Details i

Document Details: Project name Water and Wastewater Master Plan Update

Project no. 192351

Client Beaufort-Jasper Water & Sewer Authority

Revision Date Status Prepared by Reviewed by Authorized by

0 02/28/17 Draft JSL/NRW/SJ/AHW KTL JSL

1 05/12/17 Final AHW NRW JSL

Comments


BLACK & VEATCH | Table of Contents ii

Table of Contents

1.0 Introduction................................................................................................................................1

1.1 Purpose...........................................................................................................................................11.2 Scope................................................................................................................................................11.3 ReportOrganization..................................................................................................................2

2.0 PopulationProjections,WaterSystemDemandProjections,andWastewaterSystemFlowProjections................................................................................3

2.1 BJWSAWaterSystem................................................................................................................32.2 PopulationProjections.............................................................................................................42.3 HistoricalWaterDemandTrends........................................................................................62.4 WaterDemandProjections..................................................................................................122.5 HistoricalWastewaterFlowTrendsandServiceAreaProjections....................132.6 WastewaterFlowProjections.............................................................................................14

3.0 SystemUpdateandAssessment........................................................................................15

3.1 OverviewofExistingBJWSAWaterSystem..................................................................153.2 WaterSystemModeling........................................................................................................163.3 WaterSystemRecommendedImprovements.............................................................183.4 OverviewofExistingBJWSAWastewaterSystem.....................................................213.5 WastewaterSystemModeling............................................................................................213.6 WastewaterSystemRecommendedImprovements.................................................22

4.0 WaterTreatmentPlantEvaluations................................................................................26

4.1 WaterTreatmentPlantEvaluationApproach.............................................................264.2 PlantCapacityEvaluation.....................................................................................................264.3 PlantPerformanceandUnitProcessEvaluation........................................................274.4 PlantPhysicalConditionEvaluation................................................................................294.5 SummaryofRecommendedImprovements.................................................................31

5.0 WaterReclamationFacilityEvaluations........................................................................32

5.1 WaterReclamationFacilitiesEvaluationApproach..................................................325.2 PortRoyalIslandWRF...........................................................................................................325.3 CherryPointWRF....................................................................................................................325.4 LaurelBayWWTP....................................................................................................................335.5 PointSouthWWTP..................................................................................................................345.6 St.HelenaWWTP.....................................................................................................................345.7 PalmettoBluffWWTP............................................................................................................345.8 PalmKeyWWTP......................................................................................................................355.9 SummaryofRecommendedImprovements.................................................................35

6.0 CapitalImprovementProgram.........................................................................................37


BLACK & VEATCH | Table of Contents iii

LIST OF TABLES Table2.1 PopulationProjectionSummaryTable................................................................................5

Table2.2 WholesaleDemandProjectionSummary(mgd)..........................................................10

Table2.3 2015through2040WastewaterPopulationProjections.........................................14

Table2.4 CherryPointWastewaterFlowProjections...................................................................14

Table2.5 CherryPointWastewaterFlowProjections...................................................................14

Table3.1 BJWSAWaterSystemNeedsto2040................................................................................17

Table3.2 SummaryofWaterSystemImprovements.....................................................................18

Table3.3 BJWSAWastewaterSystemNeedsto2040....................................................................22

Table3.4 RecommendedWastewaterSystemImprovements...................................................25

LIST OF FIGURES Figure2.1 BJWSACorridorAllocationAreas(CAA’s)..........................................................................4

Figure2.2 CorridorAllocationAreaPopulationProjections............................................................5

Figure2.3 HistoricalWaterProductionTrends.....................................................................................6

Figure2.4 BJWSAHistoricalResidentialPopulationandWaterDemandTrends..................7

Figure2.5 HistoricalResidentialAccountandPer‐CapitaDemandTrends..............................7

Figure2.6 BJWSARetailDemandProjectionScenarios.....................................................................8

Figure2.7 HistoricalWholesaleWaterSales..........................................................................................9

Figure2.8 2015WholesaleDemandsbyCustomer...........................................................................10

Figure2.9 HistoricalPeakingFactors.....................................................................................................11

Figure2.10 ConstantPerCapitaDemandProjectionRange–ExtendedCustomers............12

Figure2.11 ComparisonofTotalSystemDemandProjections.......................................................13

Figure3.1 NorthofBroadSystemImprovementAlternatives.....................................................19

Figure3.2 SouthofBroadSystemImprovementAlternatives.....................................................20

Figure3.3 CherryPointImprovementAlternative............................................................................23

Figure3.4 PortRoyalSystemImprovementAlternatives..............................................................24

Figure4.1 ProjectedWaterDemandsandCapacityExpansion...................................................27

Figure6.1 PlanningYearCostSummary................................................................................................37

Figure6.2 AnnualizedCashFlowDiagram(2016dollars)............................................................38


BLACK & VEATCH | Introduction 1

1.0 Introduction

1.1 PURPOSE TheBeaufort‐JasperWaterandSewerAuthority(BJWSA)contractedwithBlack&VeatchtoassistwiththedevelopmentofaMasterPlanUpdatetobeusedasatooltosupporta25‐year(2016to2040)waterandwastewaterCapitalImprovementsProgram(CIP).TheprimarypurposeofthisMasterPlanUpdateistoprovidearationalanddefensibleplanforimprovementsneededtosatisfyBJWSA’swaterandwastewaterlevelofservicegoals,andmeetfutureincreasesinwaterdemandsandwastewaterflowsresultingfromgrowthwithintheretailserviceareaandadditionalwatersupplyneedsbywholesalecustomers.

1.2 SCOPE ThisMasterPlanUpdateconsistsofanassessmentoftheBJWSA’swaterdistributionsystem,assessmentofthePortRoyalIslandandCherryPointwastewatercollectionsystems,evaluationsofthewatertreatmentandwaterreclamationfacilities,andincorporationofkeyfindingsandrecommendationsintoacomprehensivecapitalimprovementprogram.Theprincipalelementsoftheplanningscopeincluded:

DevelopmentofcurrentpopulationestimatesandfuturepopulationprojectionsforBJWSA’sretailserviceareas.Evaluationofhistoricalandfutureretailpercapitawaterusage,anddeveloptotalretailandwholesalewaterdemandprojections.EvaluationofhistoricalandfuturebaseflowandpeakingfactorswithinthePortRoyalIslandandCherryPointcollectionareas,anddevelopfuturewastewaterflowprojections.

IntegrationandupdateofallsevenofBJWSA’sexistingwaterdistributionhydraulicmodels,andcapacityassessmentoftheexistingwaterdistributionandstorageinfrastructureinitsentirety.Developmentofrecommendedimprovementsrequiredtomeetlevelservicegoalsundercurrentandfutureconditions.

UpdateofthePortRoyalIslandandCherryPointforcemainhydraulicmodels,andcapacityassessmentoftheexistingmajorpumpingandforcemaininfrastructure.Developmentofrecommendedimprovementsrequiredtomeetlevelservicegoalsundercurrentandfutureconditions.

EvaluationoftheChelseaandPurrysburgWTPsforcapacity,condition,andoperationalefficiency.Developmentofrecommendedimprovementsrequiredtomeetlevelservicegoalsundercurrentandfutureconditions.

EvaluationofthePortRoyal,CherryPoint,LaurelBay,PointSouth,St.Helena,PalmettoBluff,andPalmKeyWRFsforcapacity,condition,andoperationalefficiency(notethattheHardeevilleWRFwasnotevaluatedherein).Developmentofrecommendedimprovementsrequiredtomeetlevelservicegoalsundercurrentandfutureconditions.

DevelopmentofaCapitalImprovementProgramincludingperformancetriggers(i.e.demandlevels,flowsorloadthresholds,regulatorydrivers,etc.)foreachrecommendedproject,aphasingplanbasedonprojectpriority,andplanning‐levelopinionsofprobableprojectcost.

TheplanninghorizonforthisMasterPlanUpdateisfrom2016to2040,andissubcategorizedintothreedistinctplanningperiods:


BLACK & VEATCH | Introduction 2

Short‐Term(2016‐2020), Mid‐Term(2021‐2025),and Long‐Term(2026‐2040).

BJWSAintendstoregularlyupdatetheMasterPlanonafive‐yearcycle.

1.3 REPORT ORGANIZATION TheMasterPlanUpdateisorganizedintoaseriesofTechnicalMemoranda,whichprogressivelybuildupononeanother.Abriefdescriptionofeachtechnicalmemorandumisprovidedbelow.

TechnicalMemorandum1:PopulationProjections,WaterSystemDemandProjections,WastewaterSystemFlowProjectionsdocumentsthemethodologyandresultsofthepopulation,demand,andflowprojections.

TechnicalMemorandum2:SystemUpdateandAssessmentdocumentsthehydraulicanalysesthatwerecompletedtoestablishthewaterdistributionandwastewatercollectionsystemneeds.

TechnicalMemorandum3:WaterTreatmentPlantEvaluationsdocumentsthefindingsoftheexistingfacilitiesevaluationsconductedatthewatertreatmentplants(WTPs).

TechnicalMemorandum4:WaterReclamationFacilityEvaluationsdocumentsthefindingsoftheexistingfacilitiesevaluationsconductedatthewaterreclamationfacilities(WRFs).

TechnicalMemorandum5:CapitalImprovementProgramdocumentstheprojectdrivers,projectprioritization,costestimates,andCIPcashflow.

Thisexecutivesummaryprovidesabriefoverviewofeachtechnicalmemorandum,includingsignificantfindings.


BLACK & VEATCH | Population Projections, Water System Demand Projections, and Wastewater System Flow Projections

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2.0 Population Projections, Water System Demand Projections, and Wastewater System Flow Projections

ThissectionprovidesanoverviewofTechnicalMemorandum1:PopulationProjections,WaterSystemDemandProjections,WastewaterSystemFlowProjections.

2.1 BJWSA WATER SYSTEM In2015,BJWSAserveddrinkingwatertoapproximately119,500peoplewithintheirprimaryservicearea.InordertoestablishpopulationanddemandprojectionsforBJWSA,BeaufortandJasperCountiesweredividedintotenCorridorAllocationAreas(CAAs)whichrepresentmajorpopulatedareas.CorridorAllocationAreasarepresentedonFigure2.1andinthelistbelow.

BeaufortCounty: BlufftonArea Dale Lady’sIsland OkatieSouth PortRoyalIsland St.Helena Route278East Route278West

JasperCounty: Hardeeville OkatieNorth

BJWSA’swatersystemconsistsoftheirretailcustomerarea,fourmilitaryinstallationsandsixwholesalecustomers.

Wholesale: CallawassieIsland FrippIsland HarborIsland HiltonHeadPSDNR.1 MossCreekPlantation Warsaw,EustisandOaks(WEO)WaterCompany

Military: LaurelBay NavalHospital MarineCorpsAirStation(MCAS) ParisIslandMCRD

Inthefuture,BJWSAhasthepotentialtodeliverwatertonewcustomersoutsideoftheircurrentservicearea.Forthepurposeofthewaterdemandprojections,thesepotentialnewcustomersarereferredtoas“ExtendedCustomers”.TheextendedcustomersincludeRidgeland,ExtendedDale,ExtendedJasperCounty,DaufuskieIsland,andJasperPort.



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Figure 2.1 BJWSA Corridor Allocation Areas (CAA’s)

2.2 POPULATION PROJECTIONS AsagreedtowithBJWSA,Black&Veatchusedspatialpopulationdatafromtrafficanalysiszones(TAZ)areas,providedbytheLowcountryCouncilofGovernments(LCOG),toestimatetheresidentialpopulationforeachCAAwithinBJWSA’sservicearea.Populationdatafor2010wasoriginatedfromthe2010U.S.Census.For2015,thepopulationdistributionisestimated(byinterpolation)fromLCOG’s2020populationprojections.PopulationforBJWSA’swaterserviceareafor2005through2015wascalculatedbymultiplyingthenumberofcustomers,fromBJWSA’shistorical10‐yearcustomerrecords,bythe2015CAAaveragehouseholdsizeof2.53peopleperhouse.

Atthetimeofthisstudy,theLCOGwasinthefinalstagesofupdatingtheir2016LCOGTAZstudy.TheLCOGprovidedpreliminarypopulationprojectionsfortheyears2010,2020,2030,and2040;however,afterprovidingthepreliminaryprojections,the2015mid‐censusestimatesbecame



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available.Mid‐censusestimatesforBeaufortCountyweremuchhigherthananticipatedintheLCOGpreliminaryprojections.BasedondiscussionsbetweenBlack&Veatch(B&V),CDM‐Smith(whodevelopedtheLCOGprojections)andLCOG,thepreliminaryLCOGTAZdatawasmodifiedinordertobetterreflectthemid‐censuspopulationdata.Figure2.2showstheupdatedpopulationprojectionsdisaggregatedbyCAA.

Figure 2.2 Corridor Allocation Area Population Projections

PopulationwithintheBJWSAwaterserviceareawasestimatedbyusingtheLCOGCAApopulationprojectionsandestimatingthepercentofthetotalCAApopulationservedbyBJWSAusingresidentialwatercustomerrecords.Table2.1showshistoricalandprojectedpopulationfortheBJWSAwaterservicearea.

Table 2.1 Population Projection Summary Table

YEAR TOTAL CAA POPULATION

RESIDENTIAL WATER CUSTOMER POPULATION

% OF SERVICE AREA SERVED

2015 139,960 119,497 85%

2020 163,330 142,592 87%

2025 175,583 156,668 89%

2030 187,836 171,215 91%

2035 200,694 186,798 93%

2040 213,553 202,875 95%



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2.3 HISTORICAL WATER DEMAND TRENDS BJWSA’swatersystemincludestwoWTPs,threeASRsandnine“peakingwells.”Inthisanalysis,onlythehistoricaldatafromthetwoWTPsandthe2016datafromASR#2(BroadRiver)andASR#3(PalmettoBluff)wereanalyzed.ASR#1(Chelsea)wasnotincludedsinceitispartoftheChelseaWTPflows.Peakingwellflowsarerelegatedtopeakhourdemandmanagement,andthereforewerenotincludedwithinaveragedayormaximumdayproductionanalysis.Historicalfinishedwaterdemandsandthe2016ASRrecoveryandrechargeflowsarepresentedinFigure2.3.

Figure 2.3 Historical Water Production Trends

2.3.1 Retail Demands and Projections

Theretailwatersystemdemandprojectionsweredeterminedbyevaluatinghistoricalresidentialandcommercialdemandtrends.Figure2.4showshistoricalresidentialdemands.Per‐capitawateruseisdefinedasthedailyamountofwaterusedbyeachperson.Figure2.5showshistoricalper‐capitausageforBJWSAresidentialcustomers.



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Figure 2.4 BJWSA Historical Residential Population and Water Demand Trends

Figure 2.5 Historical Residential Account and Per‐Capita Demand Trends

Percapitausehasbeentrendingdownwardforoveradecade.AccordingtoanAmericanWaterstudyof375watersystemsinover30statesandpartsofCanada,decliningper‐capitatrendscan



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beattributedtoavarietyoffactorsincludingregulationsmandatinghighefficiencyplumbingfixturesandindoorappliances,conservationandwaterefficiencyprograms,economicconditions,elasticitytowaterandsewerrateincreasesanddecreasingaveragehouseholdsize.

BJWSAconsideredthreepercapitatrendscenarios;twodifferentdecliningpercapitademandscenariosandoneconstantpercapitascenario.Theconstantpercapitascenariousedaresidentialpercapitademandvalueof78gpcd,whichistheestimatedresidentialpercapitademandvaluefor2016fortheBJWSAretailservicearea.BJWSAelectedtousetheconstantpercapitademandtrendforestimatingfuturedemands.

Projectedfuturecommercialdemandswillbecalculatedbymultiplyingacommercialdemandratiobytheprojectedresidentialdemands.BasedondiscussionswithBJWSA,afactorof0.35(commercialtoresidential)wasselectedtoprojectfuturecommercialdemandsforthisstudy.

BJWSAretaildemandsincludethecombinationofresidentialandcommercialdemands.TheseretaildemandsonlyincludetheretailresidentialandcommercialcustomerswithinBJWSA’sservicearea.Figure2.6showsthethreepotentialretaildemandprojectionscenariosfortheBJWSAservicearea.BJWSAhaselectedtousetheconstantpercapitademandscenarioforfutureplanningefforts.

Figure 2.6 BJWSA Retail Demand Projection Scenarios

2.3.2 Wholesale Demands and Projection

BJWSAiscurrentlyintheprocessofrenegotiatingcontractswiththeirwholesalecustomers,includingconvertingthefourmilitarycustomerstoretailcustomers.Sincetherearecurrently



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mastermetersforeachmilitarycustomer,theywillbeanalyzedandprojectedsimilarlytowholesalecustomersforthisanalysis.Figure2.7showshistoricalwholesalecustomerpurchases.2015wholesaledemandsbycustomerarepresentedinFigure2.8.Thesevalueswillbeusedtoestimatefuturewholesaledemands.

Black&VeatchmetwithBJWSAstaffinordertodevelopanappropriatemethodforestablishingfuturewholesalecustomerwaterdemand.Itwasdecidedthattheaveragedaydemandlimitperthewaterservicecontractforeachwholesalecustomerwouldbeusedasthe2040projectedaveragedaydemand.Whenanaveragedaylimitwasnotprovidedinthecontract,themaximumdaycontractlimitwasdividedbytheBJWSAretailsystemmaximumdaypeakingfactorusedinthisanalysis,1.6,toderiveanaveragedayvalueforthe2040demandprojection.Theprojectedannualaveragedaydemandsbetweentheactual2015demandsandfuture2040demandswereestimatedbylinearinterpolation.Notethatsincethemilitarycustomercontractsarecurrentlybeingupdated,thepreviouscontractlimitswereusedfortheirdemandprojections.Asummaryoftheprojectedwaterdemandsforeachwholesalecustomer,perplanningyear,ispresentedinTable2.2.

Figure 2.7 Historical Wholesale Water Sales



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Figure 2.8 2015 Wholesale Demands by Customer

Table 2.2 Wholesale Demand Projection Summary (mgd)

WHOLESALE CUSTOMER 2020 2025 2030 2035 2040

Callawassie 0.20 0.24 0.27 0.30 0.34

Fripp Island 0.57 0.65 0.73 0.80 0.88

Harbor Island 0.09 0.11 0.12 0.13 0.14

Hilton Head PSD NR. 1 2.93 3.13 3.34 3.54 3.75

Laurel Bay 0.30 0.33 0.37 0.40 0.44

Naval Hospital 0.07 0.08 0.09 0.10 0.11

MCAS 0.19 0.23 0.27 0.31 0.35

Moss Creek Plantation 0.43 0.45 0.47 0.50 0.52

Parris Island MCRD 0.85 0.88 0.90 0.93 0.95

WEO Water District 0.08 0.08 0.09 0.09 0.10

TOTAL 5.71 6.10 6.65 7.10 7.58

Inthefuture,BJWSAhasthepotentialtodeliverwatertonewcustomersoutsideoftheircurrentservicearea.Forthepurposeofthewaterdemandprojections,thesepotentialnewcustomersarereferredtoas“ExtendedCustomers.”SinceitisimpossibletoaccuratelypredictifandwhenextendedcustomerswillbeservedbytheBJWSAsystem,assumptionsweremadebasedoninputfromBJWSAtoestimatethenumberandtimingforextendedcustomers.

Ridgeland–Assumed25percentofRidgeland’stotalpopulationwouldbeservedbyBJWSA.Percapitademandof99.3gpcd.



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DaufuskieIsland‐Assumed100percentofDaufuskieIsland’stotalpopulationwouldbeservedbyBJWSA.Percapitademandof99.3gpcd.

ExtendedDale–ExtendedDale’spopulationcalculatedasthedifferencebetweenthetotalCAApopulationofDaleandthepopulationofDalethatiscurrentlyservedbyBJWSA.25percentofExtendedDale’spopulationwasassumedtobeservedbyBJWSA.Percapitademandof77.0gpcd.

ExtendedJasper–ExtendedJasper’spopulationwascalculatedasthedifferencebetweenthetotalpopulationofJasperCounty,Hardeeville’spopulation,OkatieNorth’spopulationandthepopulationofDaufuskieIsland.25percentofExtendedJasper’spopulationwasassumedtobeservedbyBJWSA.Percapitademandof99.3gpcd.

2.3.3 Unbilled Demands

Unbilleddemandsconsistofwaterthatissuppliedfromthewatertreatmentplantstothedistributionsystemthatisnotmeteredandbilledsuchashydrantflushing,waterlossduetoleakageandcustomermeterunder‐registration,etc.Anunbilledvalueof11percentwereutilizedtoestimatefutureunbilledwaterdemandfortheplanninghorizonofthisstudy

2.3.4 Historical Maximum Day and Peak Month Peaking Factors

HistoricalmaximumdayandpeakmonthpeakingfactorsarepresentedinFigure2.9.Amaximumdaypeakingfactorof1.6wasusedforprojectingthetotalsystemmaximumdaydemandsandapeakmonthpeakingfactorof1.4wasusedforprojectingthetotalsystempeakmonthdemands.

Figure 2.9 Historical Peaking Factors



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2.4 WATER DEMAND PROJECTIONS TotalwaterdemandsfortheBJWSAsystemarepresentedonFigure2.10,andwerecalculatedbysummingallofthedemandcomponentspresentedinprevioussectionsincludingresidential,commercial,wholesale,extendedcustomersandunbilleddemands.

Figure 2.10 Constant Per Capita Demand Projection Range – Extended Customers

WaterdemandprojectionspresentedhereinwerecomparedtoBJWSA’spreviousMasterPlanpreparedin2005.AcomparisonofthewaterforecastsfrombothstudiesisshowninFigure2.11.Theprojectionsforthismasterplanaresignificantlylowerthanthoseintheprevious2005MasterPlan.Therearemultiplefactorsthatleadtothisdifferenceincluding:

Significantlyhigherpopulationforecastsusedduringthe2005plan, Waterusecharacteristicssuchasdecliningpercapitatrends,and LowerthanpredictedwaterdemandforHiltonHeadPSD.



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Figure 2.11 Comparison of Total System Demand Projections

2.5 HISTORICAL WASTEWATER FLOW TRENDS AND SERVICE AREA PROJECTIONS

Overthepasttenyears,2005through2015,thetotalnumberofwastewatercustomersinBJWSA’ssystemhasgreatlyincreasedfrom21,500to34,525.ThereareatotalofeightserviceareasthatmakeupthesystemwiththelargestofthesebeingCherryPointandPortRoyal.ThisMasterPlanUpdatefocusedonBJWSA’stwolargestserviceareassincethevastmajorityofthesystemresideswithintheseareas.Abriefsummaryofthesetwoserviceareasisprovidedbelow:

CherryPoint–LocatedintheSOB,theCherryPointServiceAreaincludestheTownofBlufftonandseverallargesubdivisionsandgolfcoursecommunities.CherryPointisBJWSA’slargestwastewaterserviceareaandcoversapproximately100squaremilesor65,300acres.Wastewatercustomerswithinthisserviceareaincludeapopulationcloseto51,600.

PortRoyal–LocatedintheNOB,thePortRoyalServiceAreaincludesPortRoyalIslandandthreemilitarycustomers,ParrisIsland,MarineCorpsAirStationandtheNavalHospital.PortRoyalisBJWSA’ssecondlargestserviceareaandconsistsofcloseto77squaremilesor48,970acres.Wastewatercustomerswithinthisserviceareaincludeapopulationcloseto18,800.

WastewaterflowsforboththeCherryPointandPortRoyalserviceareaswereestimatedusinghistoricaltreatmentplantrecordsandbillingdata.Flowsforthecurrent,baseyear(2015)werepreparedfortheMasterPlanunderdryweather(absentanyrainfall)andwetweatherconditionsandincludedaveragedryweatherflow(ADWF),annualaveragedailyflow(AADF),maximumdailyflow(MDF)andpeakhourflow(PHF).Historicalflowdatawasusedtocalculateappropriatemaxdayandpeakhourfactors.



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2.6 WASTEWATER FLOW PROJECTIONS TAZbasedpopulationandflowforecastsweredevelopedfortheCherryPointandPortRoyalserviceareasforplanningyears2020,2025and2040.DuetotheLady’sIslandDiversionProject,whichiscurrentlyunderwayandwillsendwastewaterflowsfromLady’sIslandintothePortRoyalsystembytheyear2020,Lady’sIslandwasincorporatedintoPortRoyal’sfuturepopulationestimates.AnticipatedseptictankconversionswerealsoincorporatedintotheforecastsbasedoninputfromBJWSA.

Table 2.3 2015 through 2040 Wastewater Population Projections

SERVICE AREA POP 2015 POP 2020 POP 2025 POP 2040

Cherry Point 51,600 63,700 69,700 87,900

Port Royal 18,770 30,770 36,520 50,000

Non‐wholesalecustomerflowsweredevelopedmultiplyingthepopulationperplanningyearbyapercapitaflowof72gpcd.Theunitrateofwastewaterflowpercapitawasestimatedbydividingtheaveragedryweatherflow(3.73mgd)fromCherryPointWRF’sinfluentflowdatabytheestimatedwastewatercustomerpopulationintheCherryPointservicearea(51,600).Wholesalecustomerflowswereevaluatedindividuallyusinghistoricalflowratesandincorporatinganyprojectedincreaseinflow.TheresultingwastewaterforecastsforCherryPointaresummarizedinTable2.4andPortRoyalinTable2.5.

Table 2.4 Cherry Point Wastewater Flow Projections

YEAR AVERAGE DRY WEATHER FLOW (MGD)

ANNUAL AVERAGE DAY FLOW (MGD)

MAXIMUMDAY FLOW (MGD)

PEAK HOUR FLOW (MGD)

2015 3.78 3.91 7.20 9.24

2020 4.67 4.82 8.88 13.02

2025 5.10 5.27 9.71 14.22

2040 6.41 6.63 12.21 17.90

Table 2.5 Port Royal Wastewater Flow Projections

YEAR AVERAGE DRY WEATHER FLOW (MGD)

ANNUAL AVERAGE DAY FLOW (MGD)

MAXIMUMDAY FLOW (MGD)

PEAK HOUR FLOW (MGD)

2015 2.53 2.62 4.82 6.19

2020 3.50 3.62 6.67 9.78

2025 3.98 4.12 7.59 11.12

2040 5.14 5.31 9.78 14.34


BLACK & VEATCH | System Update and Assessment 15

3.0 System Update and Assessment ThissectionprovidesanoverviewofTechnicalMemorandum2:SystemUpdateandAssessment.ThegeneralapproachtheSystemUpdateandAssessmentincludedthefollowing:

Enhancedhydraulicmodelsbasedoncriticalnewdataincludingnewdevelopmentsandimprovements,updatedGISandsurveyinformation,recentoperationalparameters,updateddemandandflowprojectionsandupdatedmodelcalibrations.

Expansionofthehydraulicmodelstoproblematicareassuchasbottlenecks,overflowconditions,highbackpressures,low/highpressures,anddeterioratedwaterqualitylocations.

Reliablesystemperformance,deficiencyanalysisandoptimizedimprovementplanaddressingcurrentandfutureperformancelimitationsintegratedwiththeoptimalfuturetreatmentsolution.

3.1 OVERVIEW OF EXISTING BJWSA WATER SYSTEM TheBJWSAwaterdistributionsystemiscomprisedofapproximately980milesofwaterdistributionmains,whicharesuppliedbytwowatertreatmentplants(WTPs),threeaquifer‐storage‐recovery(ASR)wellsites,andninetraditionalwellsites.Thedistributionsystemisdividedintotwogeographicsubsystems,whichareseparatedbytheBroadRiverandarecommonlyreferredtoastheNorth‐of‐Broad(NOB)andSouth‐of‐Broad(SOB)systems.

3.1.1 Water Production

WaterproductionsourcestotheBJWSAwaterdistributionsystemcomefromseverallocations.

SurfacewaterfromtheSavannahRiveristreatedattheChelseaandPurrysburgWTPs.ThetotalratedcapacityoftheWTPsis39mgd.

Three(3)existingaquifer‐storage‐recovery(ASR)wellsareavailabletoinjecttreatedsurfacewaterintothegroundwateraquifersothatitcanberecoveredandusedduringhighdemandperiods.ThecurrenttotalcapacityoftheASRsisapproximately8.3mgd.

Nine(9)traditionalgroundwaterwellsareavailablewithatotalcapacityofapproximately9.1mgd.

ThewellsintheBJWSAwatersystemaretypicallyonlyoperatedduringpeakdaydemandperiods,emergencybackupsupplyoremergencyfireflowsupply.Therefore,forthepurposesofthisreport,onlytheChelseaandPurrysburgWTPcapacitiesandtheASRcapacitiesareconsideredaspartofthereliablemaximumdayproductioncapacity.ThecombinationoftheWTPsandtheASRsprovidesapproximately47.3mgdofexistingproductioncapacity.

3.1.2 Water Pumping Stations

TheBJWSAwaterdistributionsystemcurrentlycontains18waterpumpingstationsscatteredthroughouttheNOBandSOBserviceareas,includingthehigh‐servicestationstheChelseaandPurrysburgWTPs.



Pumpcurveswereincorporatedintothehydraulicmodelwhereavailable.Forpumpswithoutpumpcurves,thehydraulicmodelutilizes“synthetic”curveswhicharebasedona“bestfit”oftheobservedsystemoperatingdataduringthemodelcalibrationperiod.

3.1.3 Water Storage

TheBJWSAwaterdistributionsystemcurrentlycontains22waterstoragefacilitiesscatteredthroughouttheNOBandSOBserviceareas.Thisincludes5groundstoragefacilities(ChelseaGST,PurrysburgGST,PalmettoBluffGST,BroadRiverGSTandDatawGST)and17elevatedtanks.

ThegroundstoragefacilityatPurrysburgWTP(3MG)andoneofthestoragefacilitiesatChelseaWTP(1.5MG)arenotconsideredasdistributionsystemstoragesincetheyareusedforWTPfinishedwaterflowequalizationandchlorinecontacttime.

Additionally,eachASRhasalargevolumeofstorage(500MG)intheaquifer,ofwhich80percentisconsidered“recoverable”.However,thisstorageisnotconsideredaspartofthedistributionstoragesinceitcannotberecoveredinthetimeframeneededfordistributionsystempurposes(i.e.diurnaldemandequalizationandfireflows).OnlythegroundstoragefacilitiesattheASRsareconsideredasdistributionstorage.

3.2 WATER SYSTEM MODELING Acomprehensiveevaluationofthewaterdistributionsystemwasperformedinordertoassessthesystemwithrespecttoregulatoryperformancecriteria,capacity,andoperationaloptimizationopportunities.Thebasicapproachforabalanced,integrated,anditerativeevaluationincludedthefollowing:

Updateandcalibratehydraulicmodeltouseasatoolforplanning; Performsimpledesktopevaluationsforsupply,storageandpumpingcapacitytooutlinebasicsystemneeds;

Evaluate2015(baseline)scenariotoidentifyanyexistinglimitationsorbottlenecksinthewatersystem;

Evaluateultimateplanningyearscenario(2040)toidentifysystemneedsandthepotentialimprovementstoaddresstheneeds;

Evaluateintermediateplanningyearscenarios(2020and2025)toidentifywhichplanningperiodeachcapitalimprovementisneededby.

Basedonthesystemevaluation,thefollowingsystemdeficienciesandneedsuptothe2040scenariowereidentified:



Table 3.1 BJWSA Water System Needs to 2040

LEVEL OF SERVICE CATEGORY / SYSTEM ELEMENT

DESCRIPTION OF DEFICIENCY IDENTIFICATION OF NEED / POTENTIAL UPGRADES

Treatment and Supply Capacity

• Insufficient supply capacity across the Broad River.

• Insufficient supply capacity exists in the South of Broad system once North of Broad starts to use more of the Chelsea WTP capacity.

• Capacity of Purrysburg WTP can be expanded, thereby allowing more of Chelsea WTP capacity to be sent to the North of Broad system.

• Total ASR capacity can be increased in the North of Broad system in order to increase available maximum day supply.

Pump Station Capacity

• Insufficient supply towards Broad River GST, Lady’s Island and St. Helena Island.

• Insufficient pumping capacity from the Purrysburg High Service Pumping Station.

• Expansion of various facilities that improve supply to Lady’s Island and St. Helena. (Chelsea HSPS, Broad River BPS#2, McTeer BPS, Lady’s Island BPS#2, St. Helena BPS #1)

• Addition of new ASR (#4) to increase availability of supply during high demands.

• Increase Purrysburg High Service Pumping with WTP expansion.

Storage Volume • Insufficient storage volume exists in the North of Broad system to meet requirements.

• Insufficient storage volume exists in the South of Broad system to meet requirements.

• South of Broad is particularly low in elevated storage in the Bluffton Area.

• Potential long term difficulty with South of Broad wells, due to the potential saltwater intrusion.

• ASR #4 on Lady’s Island would provide increased storage and supply to Lady’s Island.

• Upsized replacement of Garland Mills ET would improve pressure in north Port Royal Island, while adding system storage.

• Increased South of Broad storage is necessary. Preferably elevated.

• If and when saltwater intrusion starts to become an issue, the well capacity which provides “pumped storage” should be considered to be replaced with an alternate storage facility, such as ASR#5 in Bluffton.

Transmission System – Pressure and Pipe Capacity

• BJWSA’s goal for pressure is between 45 and 80 psi during normal operating conditions.

• Various bottlenecks exist in the North of Broad system, which increase velocity and headloss.

• Areas at the north of Port Royal Island and the east of St. Helena Island have marginal pressures and will need upgrades to maintain the 45psi service goal.

• All South of Broad water main upgrades are focused on bringing water from Purrysburg to the Bluffton area.

• Addition of parallel mains along critical transmission routes to meet growing demands:

• Add main along various segments from Chelsea to Broad River.

• Add mains towards Lady’s Island #2 BPS. • Add/upsize mains towards St. Helena Island and Fripp Island.

• Add mains towards Garland Mills ET (north part of Port Royal Island).

• Increase transmission capacity from Purrysburg to Bluffton area:

• Extend existing 36” main to resolve bottleneck. • Add new water main through Bluffton area

Distribution System – Fire Flow

• Desired fire flow availability is 1000gpm throughout the system. Various areas exist, particularly dead‐end water mains located on peninsulas, where insufficient fire flow results were indicated.

• Upgrade system looping to improve fire flow availability, where feasible. Improving fire flow availability should not be done at the expense of maintaining good water quality; therefore dead‐end mains with no opportunity for looping should not be upsized.





Improve System Redundancy

• Various areas of the water system are serviced by a single feed. Increasing system redundancy is desirable, where feasible.

• Addition of various parallel water mains / storage facilities that increase system redundancy, in the event of any emergencies (water main breaks, power outages, etc.)

3.3 WATER SYSTEM RECOMMENDED IMPROVEMENTS Figure3.1andFigure3.2areprovidedtoshowtherecommendedwatersystemimprovementsfortheNorthofBroadandSouthofBroadsystems,respectively.Inthefigures,improvementsrequiredbefore2020arehighlightedred,improvementsrequiredbetween2020and2025arepurple,improvementsrequiredbetween2025and2040areshowninblueandotherprojectsforsystemredundancyareshownindarkgreen.AsummaryoftherecommendedwatersystemimprovementsisprovidedinTable3.2.Detailedinformationregardingeachimprovement,includingpipediameters,lengthsandotherfacilitysizinginformation,isavailableinAppendixFoftheSystemUpdateandAssessmentTechnicalMemorandum(TMNo.2).

Table 3.2 Summary of Water System Improvements

CATEGORY NEEDED BY 2020 NEEDED BY 2025 NEEDED BY 2040

<16” Water mains ‐ ‐ 78,700 ft

16 to 24” Water mains 19,900 ft 37,700 ft 30,000 ft

30 to 36” Water mains 18,400 ft 24,200 ft 71,700 ft

Pumping Station (additional capacity from various pumping stations)

‐ 43.4 mgd 1.4 mgd

Elevated Storage ‐ 2.25 MG 1.5 MG

Ground Storage (ASR #4) ‐ 3.0 MG ‐

ASR Pumping 3.0 mgd

Water Treatment Plant Capacity (Purrysburg)

‐ 15 mgd ‐



Figure 3.1 North of Broad System Improvement Alternatives



Figure 3.2 South of Broad System Improvement Alternatives



3.4 OVERVIEW OF EXISTING BJWSA WASTEWATER SYSTEM BJWSA’swastewatersystemservesportionsofBeaufortandJasperCountiesthrougheightdistributedwaterreclamationfacilities.Theexistingwastewatercollectionsystemismadeupofapproximately560milesofsanitarysewer,350milesofactiveforcemainsandapproximately600pumpstations.Similartothewatersystem,thewastewatersystemisdividedintotwogeographicsubsystems,whichareseparatedbytheBroadRiverandarecommonlyreferredtoastheNorth‐of‐Broad(NOB)andSouth‐of‐Broad(SOB)systems.

TheNOBsystemincludesthefollowingwastewaterserviceareas.

CurrentNOBServiceAreas: LaurelBay PalmKey PointSouth PortRoyal St.Helena

TheSOBsystemincludesthefollowingwastewaterserviceareas.

CurrentSOBServiceAreas: CherryPoint Hardeeville PalmettoBluff

3.5 WASTEWATER SYSTEM MODELING AcomprehensiveevaluationofthewastewatercollectionsystemsintheCherryPointandPortRoyalserviceareaswasperformedinordertoassesscurrent,short‐termandlong‐termsystemcapacityandpotentialrecommendationstomeetLOScriteria.Theapproachforthewastewatersystemevaluationincludedthefollowing:

Updateandverifyhydraulicmodelstouseasatoolforplanning; Evaluate2015(baseline)scenariotoidentifyanyexistingcapacitylimitations; Evaluateultimateplanningyearscenario(2040)toidentifysystemneedsandthepotentialimprovementstoaddresstheneeds;

Evaluateintermediateplanningyearscenarios(2020and2025)toidentifywhichplanningperiodeachcapitalimprovementisneededby.

Table3.3showsthewastewatersystemdeficienciesandneedsuptothe2040scenariothatwereidentifiedbasedonthesystemevaluationperformedforthisMasterPlanUpdate.



Table 3.3 BJWSA Wastewater System Needs to 2040



CHERRY POINT SERVICE AREA


• Insufficient wet weather firm and total capacity at CP‐16, CP‐18, CP‐19 and CP‐67

• Existing 14 inch force main downstream of CP‐16, CP‐18 and CP‐19 meets max velocity requirements but shows higher head is needed at the pump stations to overcome long pipe distances

• Existing 16 inch force mains downstream of CP‐67 also meets max velocity requirements but shows higher head needed at the pump station to overcome long pipe distance

Force mains • Velocities lower than the minimum 2 ft/s shown in existing 36 inch and 20 inch force mains between Okatie and the Cherry Point WRF during dry weather conditions

• Potential flushing may be required to keep solids from settling in these force mains

PORT ROYAL SERVICE AREA


• Insufficient wet weather firm and total capacity at SS‐01, SP‐01 and SP‐20

• Pump capacity at SS‐01 potentially undersized for existing wet weather conditions and should be addressed during redesign of the station to incorporate Lady’s Island

• Pump station capacity at SP‐01 and SP‐20 need to be upgraded to meet future flow conditions

Force mains • Velocities lower than the minimum 2 ft/s shown in existing force mains downstream of SS‐01 to the Port Royal WRF

• Potential flushing may be required to keep solids from settling in these force mains

3.6 WASTEWATER SYSTEM RECOMMENDED IMPROVEMENTS RecommendationsforcapacityimprovementsintheCherryPointandPortRoyalserviceareaswereanalyzedusingtheupdatedhydraulicmodel.Theseimprovementsweresizedtoconveytheultimate2040peakflows.Variouspiping,pumpingandstorageimprovementswereevaluated.ThelongtermimprovementstrategyforCherryPointincludedrecommendationstoincreasethepipingcapacityintheforcemainsasshowninFigure3.3.

RecommendedimprovementsinthePortRoyalsystemwereselectedtoincreasepumpstationcapacitythroughplanningyear2040.AsummaryoftheimprovementalternativesisprovidedinFigure3.4.



Figure 3.3 Cherry Point Improvement Alternative



Figure 3.4 Port Royal System Improvement Alternatives



Asummaryoftherecommendedwastewatersystemimprovements,byplanningphase,isprovidedinTable3.4.

Table 3.4 RecommendedWastewaterSystemImprovements

CATEGORY NEEDED BY 2020 NEEDED BY 2025 NEEDED BY 2040

CHERRY POINT

Piping • 47,000 ft of 16” parallel forcemain

• 14,000 ft. of 20” parallel forcemain

Pumping • CP‐67 (Bluffton Regional Diversion) PS Expansion

• CP‐16 (Buckwalter) PS Expansion

• CP‐18 (Island West Drive) PS Expansion

• CP‐19 (Rose Hill Diversion) PS Expansion

PORT ROYAL

Pumping • SS‐01 (Battery Creek) PS Expansion

• SP‐01 PS Expansion

• SP‐20 (Cross Creek) PS Expansion

• SP‐06 (Old Shell Point WWTP) PS Expansion

• SP‐15 (Picket Fences #1) PS Expansion


BLACK & VEATCH | Water Treatment Plant Evaluations 26

4.0 Water Treatment Plant Evaluations ThissectionprovidesanoverviewofTechnicalMemorandum3:WaterTreatmentPlantEvaluations.

4.1 WATER TREATMENT PLANT EVALUATION APPROACH TheChelseaWTPandthePurrysburgWTPwereevaluatedtoensurethewatertreatmentfacilitieswillbecapableofmeetingwaterqualitygoalsandfuturewaterquantitydemandsthroughoutthismasterplanningperiod.TheevaluationoftheWTPsincludedacapacityanalysisbaseduponthewaterdemandprojections,adesktopanalysisofthehistoricalprocessperformance,andafield‐basedphysicalconditionassessment.TheresultsoftheevaluationwereusedtoidentifymajorWTPcapitalprojectnecessarytomeetthewaterquantityandqualitygoalsthroughoutthismasterplanninghorizon.Theresultsoftheevaluationaresummarizedbelow.

4.2 PLANT CAPACITY EVALUATION Thecurrentcapacityofthewatertreatmentfacilitiesis24mgd(ChelseaWTP)and15mgd(PurrysburgWTP).Inaddition,BJWSAhasthreeaquiferstorageandrecovery(ASR)wellsthatprovideadditionalcapacitytomeetmaximumdaydemands.ThecurrentcapacityoftheASRwellsbasedontheASRpumpsassociatedwitheachASRisasfollows:

ASR#1(Chelsea):2.5mgd

ASR#2(BroadRiver):2.88mgd

ASR#3(PalmettoBluff):2.88mgd

CombiningtheplantcapacitiesandASRcapacities,thecurrenttotalproductioncapacitytomeetmaximumdaydemandsis47.3mgd.

BlackandVeatchrecommendsasetofcriteriaforassessingtheneedforcapacityexpansion.Thefirstcriterionforexpansionaddressesinitiationoftheplanningprocess.Asthemaximumdaydemand(MDD)approachesandreaches80percentofthetotalproductioncapacity,thentheplanningprocessshouldbegin.Thesecondcriterionaddressestheneedforthecapacityexpansiontobeconstructedandplacedintoservice.AstheMDDapproachesandreaches90percentofthetotalproductioncapacity,thenewcapacityshouldbeplacedintoservice.NotethatthissetofcriteriaisslightlymoreconservativethanSCDHECrequirements;however,ourWTPplanningexperiencesupportstheviewthatSCDHEC’srequirementsprovideminimalsafetyfactorbetweentheactualMDDandasystem’sproductioncapacity.ThismoreconservativesetofcriteriawasagreeduponbyBJWSAstaff.Utilizingtheagreeduponcriteria,thewaterdemandprojectionswereoverlaidwithexistingtreatmentcapacityinFigure4.1todeterminewhenwatertreatmentplantorASRexpansionsneedtooccur.



Figure 4.1 Projected Water Demands and Capacity Expansion

ThesedataindicatethatadditionalcapacityisneededinboththeNorthofBroadsystemandtheSouthofBroadsystemduringthismasterplanningperiod..Thefollowingimprovementsarerecommended:

NorthofBroad:

● AddanadditionalASR#4toserveLady’sIsland.ThecapacityoftheASRwillbeapproximately2.8mgd,withplanningbeginningaround2020andtheASRonlineinby2025.

● Expansion of the Chelsea North of Broad pumping station by 2025 to supply water fromChelseatotheNorthofBroadsystem.

● PlanningforadditionalNorthofBroadcapacityshouldbeginbetween2035and2040.

SouthofBroad:

● PurrysburgWTPexpansionto30mgd(15mgdexpansion).Thegraphicaldataindicatesthatplanningshouldbeginaround2020,withthenewplantonlineby2025. However,theactualcurrent sustainableplantcapacityat thePurrysburgWTP is less than15mgdassumingonefilteroutofservice.Thisshouldbetakenintoaccountinthetimingoftheplantexpansion.

● Planningforasecondcapacityexpansionisneededaround2040.

4.3 PLANT PERFORMANCE AND UNIT PROCESS EVALUATION Waterqualityandtreatmentgoalsweredevelopedtoformthebasisforevaluationofexistingunitprocessesandpotentialtreatmentprocesssequences.Thesegoalsweredictatedbyregulations(i.e.SCDHECStatePrimaryDrinkingWaterRegulations(SPDWRs))thatprovideasetofcriteriathatmustbereachedtoavoidnon‐compliance,andbyhigherutility‐chosengoalstogobeyondthe

0

6

12

18

24

30

36

42

48

54

60

66

72

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000

2015 2020 2025 2040

Supply Cap

acity (m

gd)

Supply Cap

acity (gpm)

Max. Day Demand vs. Production (excludes wells; includes ASRs)

Future Ladys Island ASR#4

Purrysburg Expansion

Purrysburg WTP

ASR #3 (Palmetto Bluff)

ASR #2 (Broad River)

ASR #1 (Chelsea)

Chelsea WTP

Max. Day Demand Total

Max. Day Demand Extended

90% of Available Supply

80% of Available Supply

47.3 mgd

65.1 mgd

58.6 mgd

42.5 mgd

37.8 mgd

52.1 mgd

47.3 mgd

65.1 mgd



minimumrequiredtosatisfyregulatoryrequirements(i.e.PartnershipforSafeWater(PSW)andtheUSEPAAreaWideOptimizationProgram(AWOP)).Thesehighergoalsweresettoeitherassurecustomeracceptancefromanaestheticstandpointortoprovidegreatercomfortandassurancewithrespecttopublichealth.

HistoricaloperationalandperformancedatafromtheChelseaWTPandPurrysburgWTPwerecollectedandanalyzedfromFebruary2013throughJuly2016.Thehistoricaldatawasthencomparedtotheestablishedtreatmentgoals.ThepotentialneededimprovementsrelatedtoplantperformanceandunitprocessesattheChelseaandPurrysburgWTPsareasfollows:

4.3.1 Clarification

Improvedsettledwaterturbidityremovalandfinishedwatercolorreduction:

Continuedcoagulationoptimizationforturbidityandcolorremoval.Thiscouldincludemodifiedcoagulationconditions,alternatepolymers,ormodifiedmixingspeeds.Thisisapplicableatbothplants.

ThesettledwaterturbidityattheChelseaWTPhasgenerallymetregulatorygoalsathistoricalflowrates,buthasnotmetthehigherutility‐chosengoalstogobeyondtheminimumrequiredtosatisfyregulatoryrequirements.Therearesomephysicalissuesthatmayaffectthesettledwaterturbidityathigherflowrates,including:

● The inlet valves into the sedimentationbasinsare relatively small andmaybe creatinghighvelocitiesenteringthesedimentationbasins. Evaluateoptionsforreducingflocshear inthisareaoftheplant.

● ThecurrenttubesettlerloadingratehasbeenapprovedbySCDHECandmeetsthepublishedloadingrates;however,theloadingrateisrelativelyaggressiveandmaybecontributingtothehigher thandesired settledwater turbidities. When it is time to replace the tube settlers, ifadditionalimprovementtosettledwaterturbidityisdesired,thetubescouldbereplacedwithplatesettlersatthattime.

AtthePurrysburgWTP,considerperformingpilottestingpriortothenextexpansiontodetermineifalowerplateloadingrateshouldbeconsidered.ThecurrentplateloadingratemeetsSCDHECrequirements,butishigherthanBlack&VeatchhasutilizedatotherprojectsinSouthCarolinathathaveperformedeffectively.Thepilotingshouldalsoincludefiltermediapilottestingtoconfirmmediaconfigurationanddepthsforfutureexpansions.

4.3.2 Filtration

Considerprovidingadditionalfilterareaasneededtoprovideplantcapacitywithonefilteroutofservice.Thiswillallowtheplantstosustaincapacitywhenbackwashingafilter.

4.3.3 Disinfection

Ifadditionalcontrolofdisinfectionbyproducts isneededinthefuture, thesecondaryammoniafeedpointaftertheCTclearwell(s)couldbeutilizedinthefutureatbothplantstoallowforlowerchlorineresidualstobeutilizedforCTfollowedbydosingofadditionalchlorineandammoniatoformchloramines.



4.3.4 Regulatory Considerations

Theplanthasconsistentlymetandsurpassedregulatoryrequirements.Inthefuture,tasteandodor/algaltoxinsmaybethebiggestconcern.BJWSAhastechnologiesinplace(sourcecontrol,PAC,chlorine)tohelpaddresstheseissues.IfadditionaltreatmentisneededbeyondPACandchlorine,ozoneoradvancedoxidationcouldbeconsidered.Forplanningpurposes,itisrecommendedthattheCIPinclude:

An initial study to develop an understanding of physical layout and costs of more advancedprocessesfortasteandodor/algaltoxinscontrol.

Pilotstudyofanadvancedprocess.

Placeholderforconstructionofanewprocessinthelong‐termCIP.

4.4 PLANT PHYSICAL CONDITION EVALUATION SitevisitstothetreatmentfacilitiesanddiscussionwithplantstaffoccurredonJuly11andJuly12,2016.Basedonthesitevisitsanddiscussionwithplantstaff,thefollowingobservationsandkeyfindingswereidentified.

4.4.1 Chelsea Water Treatment Plant:

RiverPumpingStation:TheRiverPumpingStationtransferswaterfromtheSavannahRivertotheRawWaterCanalthroughashortsectionof54‐inchductileironpipingthatwasinstalledintheearly2000s(whenthePurrysburgWTPwasconstructed).Accordingtoplantstaff,thispipingwasoriginallyintendedtobeatemporarypipingsystembuthasremainedasapermanentsystem.Thispipingshouldbeevaluatedtoconfirmitsconditionandensurethatitisviablelong‐term.Inaddition,aflowmeter(in‐pipetype)shouldbeaddedtothisline.

RawWaterCanal:

● Weedandalgaegrowthand, consequently,deterioration inwaterqualityas thewater flowsalongthecanalareaconcern. Plantandoperationsstaffcontinuetomaintain thecanalandapplyalgaecontrolchemicalsasneeded.

● There is a concrete flume bridge that is part of the canal that is in poor condition. Aninspection report has been completed previously for the concrete flume bridge includingrecommendedimprovements.

● TheRawWaterCanalintakescreenattheChelseaReservoirpumpingstationintakeisinpoorconditionandneedstoberehabilitated.

● The rawwater canal outlet structure at the endof the rawwater canal (across SnakeRoadfromtheChelseaWTP)isinpoorshapeandneedstoberehabilitated.Thisincludestheshortconcretebridgesthatextendfromshoretotheoutletstructure.

PACFeedSystem:TheexistingbulkbagPACfeedsystemisworking,butthebulkbagscanbedifficulttoobtain,andtheeffortrequiredtoloadandreplacethebagsissignificant.Replacementoftheexistingsystemwithasilosystemtoreducedependenceonbulkbagsandreducemaintenanceisrecommended.



Flocculation/SedimentationBasins:Somecarryoverofflocwasobservedattheeffluentlaundersofthesedimentationbasin.Thismaybeduetoshearattheinletvalvesintothesedimentationbasin.

Filters:ThefiltersattheChelseaWTPwerelastrehabilitatedinthelate1990s.Duringtheplanningperiod,rehabilitationofthefiltersandreplacementofmediaisrecommended.

HighServicePumpingStationIsolationValve:Thehighservicepumpingstationcurrentlyincludesamanualisolationvalvethatallowsflowtobetransferredtoeitherthe“northern”systemorthe“southern”system.RehabilitatingorreplacingthisvalvewithanelectricvalveandintegratingitsoperationintotheSCADAsystemisdesiredbyplantstaff.

ResidualsHandling:Thereisonlyoneexistingalumsludgedryingbedwhichiscleanedapproximatelyeveryfiveyears.Adetailedresidualshandlingstudyisrecommendedforadetailedlookatcurrentandprojectedresidualsquantities,capacity/redundancyoftheexistingresidualshandlingsystem,residualshandlingalternatives(thickeninganddewateringalternatives),andultimatedisposaloptionsfortheresiduals.

SCADASystem:TheSCADAsystemneedstobeupgraded.

4.4.2 Purrysburg Water Treatment Plant:

RawWaterReservoir:Theplantstaffindicatedthattherehavebeensomeissueswithclamsintherawwaterreservoirandcloggingofthereservoirpumpingstationsuctionlines.Thisissueisbeingaddressedbyvaryingthelevelinthereservoirtoagreaterextent.Someadditionalcleaningoftherawwaterreservoirlinesmayberequiredinthefuture.

PACFeedSystem:TheexistingbulkbagPACfeedsystemisworking,butthebulkbagscanbedifficulttoget,andtheeffortrequiredtoloadandreplacethebagscanbesignificant.Inaddition,theshortdetentiontimeintherawwaterlinelimitstheeffectivenessofthePAC.Replacementoftheexistingsystemwithasilosystemtoreducedependenceonbulkbagsandreducemaintenanceisrecommended.

Flocculation/SedimentationBasins:Themainissuewiththesebasinshasbeenalgaegrowthonthetroughsofthesedimentationbasins.Toaddressthisissue,theadditionofplateortroughcoversoracoverovertheentirebasincouldbeconsidered.

Filters:Themainissuewiththefiltershasbeenthefilterunderdrains,specificallythemediaretentioncapsontheunderdrains.Theunderdrainsinthreeofthefourfiltershaseitherbeenreplacedorreinforcedsincetheplantwentonlinein2004.Rehabilitationoftheexistingfiltersandreplacementofmediaisrecommendedwithintheplanningperiod.

Clearwell:Thereisonlyoneclearwellonsite,whichrequiresfortheplanttobetakenofflinewhenmaintenanceoftheclearwellisneeded.Astheplantisexpanded,asecondclearwellshouldbeconstructedforadditionalcapacityandtoallowformaintenanceoftheclearwells.

ResidualsHandling:CurrentlythereisnotapermanentmeanstodewaterresidualsatthePurrysburgWTP.Mobiledewateringhasbeenusedtodewatersolidsfromtheirresidualslagoons.AdetailedresidualshandlingstudyasdescribedfortheChelseaWTPisalsorecommendedforthePurrysburgWTP.

SCADASystem:TheSCADAsystemneedstobeupgraded.



4.5 SUMMARY OF RECOMMENDED IMPROVEMENTS Therecommendedwatertreatmentprojectsaresummarizedandphasedasfollows:

Short‐TermImprovements(2016‐2020):

● Rawwatercanalimprovements.

● PACfeedimprovements(ChelseaandPurrysburg).

● Processoptimizationstudy(residualshandling, flocoptimization,preliminarytasteandodorprocessevaluation).

● Purrysburgplatesettler/filtermediapilotstudy.

● Purrysburg15mgdexpansion(design).

Mid‐TermImprovements(2021‐2025):

● Purrysburg15mgdexpansion(construction).

● Chelseaflocculation/sedimentationimprovementsPhase1(CFDmodelingandmodificationtosedimentationbasininletvalves).

● Filterrehabilitation–Chelsea.

● SCADAsystemupgrades.

● Chelsea and Purrysburg residuals handling (placeholder – scope to be defined in ProcessOptimizationStudy).

● ChelseaNorthofBroadHSPSexpansion.

● PilotStudy–Advancedtasteandodorcontrolprocess.

Long‐TermImprovements(2026‐2040):

● Chelseaflocculation/sedimentationImprovementsPhase2(replacementoftubesettlerswithplatesettlers(ornewtubesettlers)).

● Filterrehabilitation–Purrysburg.

● Advancedtasteandodorcontrolprocess(placeholder).


BLACK & VEATCH | Water Reclamation Facility Evaluations 32

5.0 Water Reclamation Facility Evaluations ThissectionprovidesanoverviewofTechnicalMemorandum4:WaterReclamationFacilityEvaluations.

5.1 WATER RECLAMATION FACILITIES EVALUATION APPROACH Seven(7)oftheBJWSAwaterreclamationfacilities(WRFs)wereevaluatedtoensurethefacilitieswill be capable of meeting existing and future permit requirements and level of service goalsthroughout thismaster planning period. The evaluation included Port Royal IslandWRF, CherryPointWRF,LaurelBayWWTP,PointSouthWWTP,St.HelenaWWTP,PalmettoBluffWWTP,andPalmKeyWWTP. NotethattheHardeevilleWRFwasnotevaluatedhereinbecausethefacilityiscurrently undergoing a capacity expansion and upgrade. The WRF facilities were evaluated toassess thephysical condition, capacity, operating strategy andperformanceof themajorprocessunits. The objective of the evaluation was to identify major repair, replacement and capitalimprovement projects that are recommended to meet performance requirements and demandsthroughoutthismasterplanninghorizon.Theresultsoftheevaluationaresummarizedbelow.

5.2 PORT ROYAL ISLAND WRF

5.2.1 Regulatory Compliance

PlantDMRdatashowsammoniaasthekeyregulatedparameter.InMay2014,monthlyaverageandweeklyaverageseasonallimits(2.0mg/Land3.0mg/L)wereexceeded(2.97mg/Land4.31mg/L).Longtermammoniadataaverages0.23mg/Lconfirmingthatnitrificationprocesscapacityisavailableatcurrentflowsandloadings.

5.2.2 Capacity Evaluation

Current(2015)QMAX30is2.79MGDor28percentofthe10MGDratedplantcapacity.PlantsitedevelopmentplanningandexistinghydraulicprofilesupportsaServiceAreabuild‐outQMAX30capacityof15MGD.Withoperationalcontrolstosustainandmonitornitrification,theexistingmainprocesstrain,residualsmanagementfacilitiesandeffluentpumpingsystemsshouldbeabletotreattheprojectedyear2040demands.

5.2.3 Condition Assessment

Twoaeratordrivesandoneaeratormotorhavebeenrebuilt.Allaeratorsarecurrentlyperformingwithoutindicationoffuturefailure.Constant‐speedeffluentpumpsrequirethrottlingtocontrolcavitationsuggestingthatimpellertrimmingisrequired.UVballastsandbulbshavebeenproblematicwithrecurringmaintenanceandreplacement.BlowerssupplyingmixingairtotheSludgeHoldingTankshaverequiredheavymaintenanceandreplacementmayberequired.

5.3 CHERRY POINT WRF


Current(2015)QMAX30is4.06MGDor54percentofpermitted7.5MGDplantcapacity.AllplanteffluentisdischargedtowetlandsunderNPDESPermitand/ortogolfcourseirrigationandreuseunderLandApplication(ND)Permits.ThereceivingwaterforthewetlandsdischargesistheNewRiverinJasperCounty.Discharges(QMAX30)towetlandsystemsarelimitedasfollows:



GreatSwampWetlands(Outfall002a&002b): 7.50MGD DelWebbWetlands(Outfall003a): 0.2963MGD* DelWebbWetlands(Outfall003b): 0.1189MGD*

*DelWebWetlandSystemisavailableasbackuptoNDdisposalbutnotusedinrecentyears.

In2015,summermonthgolfcourseirrigationaveraged0.85MGDor17.4percentofpermittedcapacity.Keyregulatedparametersincludetoxicityandammonia.Aneffluenttoxicityviolationwasreportedin2015andinconsistentlaboratorytestingandsamplingprocedurescontinuetobeevaluated.


PlantsitedevelopmentplanningandexistinghydraulicprofilesupportaServiceAreabuild‐outpermittedcapacityof15MGD.TheprojectedQMAX30flowatYear2040is7.1MGD,or95percentofthecurrentpermittedcapacity.ExpansionoftheCherryPointfacilitywillbeneededintotheLong‐Termplanningperiodofthismasterplan(2026‐2040).

Further,theexisting500‐acreGreatSwampwetlandsystemmustbereratedand/orexpandedtoacceptdischargesexceeding7.5MGDand/orirrigationandreusesitesadded.Additionalwetlandstotaling600acreshavebeenacquiredandBJWSAhasrequestedthattheexistingGreatSwampNPDESPermitbemodifiedtoadd3.5MGDofsurfacewaterdischargecapacity.


Differentialsettlementwasobservedatseveralstructureswithimpactonpipingandconduits.Liningsinallinfluentchannelandflowcontrolstructureshavebeeninstalledorrestored.Theon‐siteEffluentStoragePondlinerwasreplacedin2016witha20‐yearservicelife.Theconditionofthe10‐yearoldEqualizationTankdomelinerisunknown,andlinerrepairorreplacementplanningissuggested.Ongoingaeratorgearboxleakageissuesappeartoberesolved.BuildingdeficienciesincludeDewateringBuildingRoofleakageandgalvanizedmetaldoorcorrosion.

5.4 LAUREL BAY WWTP

5.4.1 Regulatory compliance

PlanteffluentisdischargedtotheBroadRiverunderNPDESPermit.Permitflowlimitis0.75MGD.Current(2015)QMAX30is0.488MGD.TherewerenoNPDESviolationsin2015.


Thefacilityishydraulicallyloadedat65percentoftheNPDESpermitrequirement,thereforethereisapproximately0.112MGDofcapacityavailablepriortoreachingthe80percentcapacitylevel(PERrequired).


Theconcretestructuresareingoodcondition.TheSCADA/VFDsystemshavebeenrecentlyupgraded.Thegritclassifierhasbeenreplacedrecently.Thetricklingfilterhasalsobeenrebuiltrecently.



5.5 POINT SOUTH WWTP


PlanteffluentisdischargedtoadedicatedsprayfieldunderaNDPermit.Thepermittedflowlimitis0.60MGD.Current(2015)QMAX30is0.091MGD.TherewerenoNDPermitviolationsin2015.


Thefacilityishydraulicallyloadedat15percentoftheNDpermitrequirement,thereforethereisapproximately0.389MGDofcapacityavailablepriortoreachingthe80percentcapacitylevel(PERrequired).


Thefacilityisingoodconditionandiseasytomaintain.

5.6 ST. HELENA WWTP


PlanteffluentisdischargedtoDatawIslandgolfcoursesandHenry’sSodFarmunderaNDPermit.Thepermittedflowlimitis0.60MGD.Current(2015)QMAX30is0.628.Thisflowoccurredduringthehistoric2015OctoberfloodresultingfromHurricaneMatthew.Nonflood2015QMAX30is0.50MGD.TherewerenootherNDPermitviolationsin2015.


Thefacilityishydraulicallyloadedat83percentoftheNDpermitrequirement,whichplacesitbeyondthethresholdforpreparationofanexpansionPER.However,flowsarecurrentlybeingdivertedawayfromthisfacilityunderthecurrent“Lady’sIslandDiversion”project.Thehydraulicloadingtothefacilityshouldbereexaminedoncethesediversionsarecomplete.


Thefacilityisingoodcondition,withnomajorrepairsthatareurgentlyneeded.

5.7 PALMETTO BLUFF WWTP


PlanteffluentisdischargedtoadedicatedsprayfieldunderaNDPermit.Thepermittedflowlimitis0.50MGD.Current(2015)QMAX30is0.069MGD.TherewasoneNDPermitfecalviolationin2015.Thecauseofthisviolationwasidentified,andhasbeencorrected.




Thefacilityisingenerallygoodcondition.



5.8 PALM KEY WWTP


PlanteffluentisdischargedtoadedicatedsprayfieldunderaNDPermit.Thepermittedflowlimitis0.05MGD.Current(2015)QMAX30is0.0048MGD.TherewerenoNDPermitviolationsin2015.




Thefacilityisinfairtogoodcondition.Theintegrityofthelagoonlinerisquestionable,andfurtherinvestigationsareadvisable.

5.9 SUMMARY OF RECOMMENDED IMPROVEMENTS The recommended water reclamation facility projects are summarized below and phased asfollows:

Short‐TermImprovements(2016‐2020):

● PortRoyalWRF–HeadworksScreenNo.2.

● PortRoyalWRF–Disinfectionsystemevaluationandexpansion.

● PortRoyalWRF–Headworkschannelliningreplacement.

● PortRoyalWRF–Effluentfilterclothreplacement.

● PortRoyalWRF–Plantdrainpumpreplacement.

● PortRoyalWRF–AeratorVFDsinstallation.

● LaurelBayWRF–Sodiumbisulfidefeedsysteminstallation.

● CherryPointWRF–SludgeHoldingTankNo.4.

● CherryPointWRF–Effluentfilterclothreplacement.

● CherryPointWRF–Equalizationtankscrubberinstallation.

● CherryPointWRF–Gritclassifierreplacement.

● CherryPointWRF–AeratorVFDinstallation(Bioreactors1&2).

Mid‐TermImprovements(2021‐2025):

● PortRoyalWRF–BeltFilterPressNo.2.

● PortRoyalWRF–Roofreplacements.

● PortRoyalWRF–Equalizationtankdomelinerreplacement.

● PortRoyalWRF–EffluentPumpNo.4installation.

● CherryPointWRF–Roofreplacements.



● CherryPointWRF–Equalizationtankdomelinerreplacement.

● CherryPointWRF–Septagereceivingfacility.

● CherryPointWRF–BioreactorsNo.1&2renovations.

● CherryPointWRF–GreatSwampexpansion.

● CherryPointWRF–GreatSwamptransmissionmain.

Long‐TermImprovements(2026‐2040):

● PortRoyalWRF–Effluentfilterclothreplacement(every10years).

● CherryPointWRF–Effluentpondlinerreplacement.

● CherryPointWRF–Plantexpansion.

● CherryPointWRF–Effluentfilterclothreplacement.


BLACK & VEATCH | Capital Improvement Program 37

6.0 Capital Improvement Program ThissectionprovidesanoverviewofTechnicalMemorandum5:CapitalImprovementProgram.

Black&VeatchdevelopedaCapitalImprovementsProgram(CIP)tosystematicallyplanfortheimplementationoftheprojectsidentifiedinthisWaterandWastewaterMasterPlanUpdatereport.TheCIPwasdevelopedbypreparingitemizedopinionsofprobablecostforeachproject,allocatingeachprojectintoitstechnicallyappropriateplanningperiod,andprioritizingprojectswithineachplanningperiodbasedonprojectdrivers.Theultimateresultisa$271.2million(2016dollars)programtobeimplementedoverthe25yearplanninghorizon.Approximately$57.4millionofprojectcapitalneedsareconsideredShort‐Termbetween2016and2020.Middle‐Termprojectsbetween2021and2025areestimatedtocostapproximately$117.7million.Long‐Termprojectcapitalneedsareapproximately$96.1millionin2026through2040.

Asummaryoftheprojectcostsdividedintoplanningperiods,andfurtherdisaggregatedbyprojecttype,isprovidedinFigure6.1below.Generallyspeaking,Short‐Termprojectsaddressmoreimminentcapacityneeds,Mid‐TermprojectsderivefromoperationalandMid‐Termcapacityneeds,andLong‐Termcostsreflectinvestmentsneededtoimprovesystemreliability.

Figure 6.1 Planning Year Cost Summary

Figure6.2includesanannualizedCIPcashflowtoprovideamorerefinedviewofcapitalexpendituresandprojecttypesovertheplanninghorizon.Projectsthathavebeenidentifiedas

$ M

$20 M

$40 M

$60 M

$80 M

$100 M

$120 M

$140 M

Short Term (2016‐2020) Medium Term (2021‐2025) Long Term (2026‐2040)

2016 Dollars

Water Distribution

Water Treatment Plants

Water Reclamation Facilities

Wastewater Collection (Option 1)



higherpriorityhavebeenacceleratedtowardthebeginningofeachplanningperiod,whereaslowerpriorityprojectshavebeendeferredtowardtheendofeachplanningperiod.ThisprioritizedannualCIPcashflowisintendedtoprovideamoreaccurateplanforyearlyCIPspending.

Figure 6.2 Annualized Cash Flow Diagram (2016 dollars)

Waterdistributionprojectsareprimarilydrivenbycapacityneedswithlong‐termconsiderationforreliabilitydrivenprojects.Watertreatmentplantprojectsarealsoprimarilydrivenbycapacityneeds,butarealsodrivenbyprojectsthatareintendedtoimproveoperationalefficiency.Watermainprojectsandwatertreatmentplantprojectsrequirethehighestcapitalexpenditureoverthe25‐yearplanninghorizon.

Theexistingwatertreatmentfacilitiesdonothavesufficientcapacitytomeetfuturecapacityneeds.Therefore,thePurrysburgWTPrequiresanexpansionwithinthemid‐termplanningperiod.ThisexpansioncontributesasignificantportionofthetotalCIPcostsandalsocausesasignificantspikeincapitalcostsduringthemid‐termplanningperiod.

Theprojectdriversforthewaterreclamationfacility(wastewatertreatment)projectsincludeamixofcapacity,operationalefficiencyandconditionprojects.Wastewatercollectionprojectsareentirelydrivenbycapacityneeds.Oneofthemainreasonsfortherelativelylowamountofspendingidentifiedforwastewaterreclamationfacilitiesandcollections,comparedtothewaterinfrastructure,isduetothepastcapacityexpansionsinthe1990’sand2000’s.Thewater

$ M

$5 M

$10 M

$15 M

$20 M

$25 M

$30 M

$35 M

$40 M

2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040

2016 Dollars

Annual Cash Flow (with Wastewater Collection Option 1)

Wastewater Collection ‐ Wet Weather Storage

Wastewater Collection ‐ Forcemains

Wastewater Collection ‐ Pumping

Water Reclamation Facilities (WW Treatment)

Water Distribution ‐ Storage

Water Distribution ‐ Watermains

Water Distribution ‐ Pumping

Water Treatment Plants (Supply)

Short‐Term Mid‐Term Long‐Term



reclamationfacilitieshavesufficientexistingcapacitytomeetlevelofservicegoalsoverthenext25years.

ThecompletionofthisWaterandWastewaterMasterPlanUpdatehasprovidedafreshperspectiveontheexistingBJWSAsystems,underbothexistingandprojectedfutureconditions.TherecommendationsdrawnfromthecollaborativeplanningprocessprovideaframeworkforBJWSAtocontinuetosatisfylevelofservicegoalsandmeetfutureincreasesinwaterdemandsandwastewaterflowsresultingfromgrowthwithinretailandwholesaleserviceareas.Evenwithinthisframework,waterandwastewaterutilitiesarefacedwithanever‐changingregulatory,political,andgrowthlandscapethatresultsinchangesinprojectionsandpriorities.ThisMasterPlanandCIPshouldbeconsideredalivingdocumentthathelpscommunicateasetofrecommendationsforpossiblefutureimplementation,butalsoadocumentthatshouldbereviewedregularlytoensurethattherecommendationshereinremainrelevanttothedirectionofBJWSA’sdynamicoperations.Afive‐yearupdateofthisMasterPlanisrecommendedtoachievethisadaptivemanagementapproach.

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