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Home My WebLink AboutItem #2 Water Facilities Planning StudyCITYOFCHUBBUCKWater WaterDemandTheCity’smaximumdaydemandisbelowthe firm capacityandthecurrent storagecapacitycanmeetthepeak hourlydemandWaterRights: 13, WaterStorageatPopulation20,000 Whenthepopulationapproaches18,500peoplethecurre ntstoragewillbeatcapacity Atapprox. 21,500people, currentwatersupplywilln otbesufficienttomeetmax. dailydemand FireFlowResultsof2021 1.7% offirehydrantsdidnotmeetfireflowduring AlternativesSummaryNewWell # 7ConstructionNewWell # 8 ConstructionNew Well #9 DeveloperConstruction No ActionWater ConservationLeakDetectionServiceSUPPLYNo ActionMainZoneAdditionalStorageTankEastBenchDeveloperStorageTankSTORAGE8, 190ft ofwaterlinetobereplaced orplacedto meetallfireflowdemandsFIREFLOWIMPROVEMENTS NoActionPhasedImprovements basedonPopulationPriority1 - 5,350ftPriority2 - NOT INCLUDING $1.6MINANNUALREPLACEMENT*CITYHASADOPTED AWATERRATESTUDYTHATWASCOMPLETEDIN MAYOF2022TOFUNDPRIORITY1IMPROVEMENTS*Allcosts are in2024Dollars. Costsincludeapproximatee ngineeringandplanningcontingencies. Thecostestimatehereinisbasedon our perceptionofcurrentconditionsattheprojectlocation. This estimatereflectsouropinionofprobablecostatthis time andissubjecttochangeast he projectdesignmatures. KellerAssociateshas QUESTIONS?ColterHollingshead, PEchollingshead@kellerassociates. com GarrettThompson, EIgthompson@kellerassociates. comkellerassociates.com | (208) CHUBBUCK, IDAHO WATERFACILITIESPLANNINGSTUDY CITYOFCHUBBUCK, IDAHO FINALCITYREVIEW January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 PageiTABLEOF CONTENTSTABLEOFCONTENTS ............................................................................................................................................... ILISTOFTABLES ..................................................................................................................................................... IVLIST OFFIGURES ..................................................................................................................................................... V AUTHORIZATION ................................................................................................................................................... 1 EXECUTIVESUMMARY ........................................................................................................................................... 2CHAPTER 1INTRODUCTION ............................................................................................................................ 41. 1INTRODUCTION ................................................................................................................................................. 41. 2SCOPE ............................................................................................................................................................. 51.3REPORTORGANIZATION ..................................................................................................................................... 51. 4PROJECT PURPOSE & NEED ................................................................................................................................. 61.5ABBREVIATIONS ................................................................................................................................................ 61.6DEFINITION OFTERMS........................................................................................................................................ 7 CHAPTER2PROJECTPLANNING ...................................................................................................................... 92.1 PROPOSEDPROJECTPLANNINGAREA IDENTIFICATION .............................................................................................. 92.2ENVIRONMENTALRESOURCESPRESENT ............................................................................................................... 102. 2.1Physiography, Topography, Geology, andSoils ..................................................................................... 102. 2.2Ground WaterHydrology ....................................................................................................................... 112.2. 3SurfaceWater Hydrology ....................................................................................................................... 112. 2.4Fauna, Flora, andNatural Communities ................................................................................................ 122.2.5Zoning, Land Use, andDevelopment ..................................................................................................... 12 2.2.6CulturalResources ( Historical & Archaeological) ................................................................................... 12 2.2.7Utility Use ............................................................................................................................................... 122.2.8Floodplains/Wetlands ............................................................................................................................ 122.2. 9 Wild & Scenic Rivers ............................................................................................................................... 13 2.2.10 Public Health & WaterQuality Considerations ...................................................................................... 132.2. 11Important Farmlands Protection ........................................................................................................... 132.2. 12Proximity to aSole Source Aquifer ......................................................................................................... 142.2.13Climate ................................................................................................................................................... 142. 2.14Air Quality & Noise ................................................................................................................................. 152. 3SOCIOECONOMICPROFILE/POPULATIONSTATISTICS .............................................................................................. 15 CHAPTER3 EXISTING FACILITIESCONDITION & EVALUATION ....................................................................... 253.1SYSTEM HISTORY ............................................................................................................................................ 253.2 WATERRESOURCESANALYSIS ........................................................................................................................... 25 3.2.1 WaterProductionandConsumption ..................................................................................................... 26 3.2.2 ExistingWaterDemand ......................................................................................................................... 273.2. 3WaterRights .......................................................................................................................................... 293.3 WATERQUALITYAND CAPACITY......................................................................................................................... 293. January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Pageii3.4.4Well # 4 ................................................................................................................................................... 373.4.5Well # 5 ................................................................................................................................................... 383.4.6Well # 6 ................................................................................................................................................... 383.4.7WellSystem Summary ........................................................................................................................... 39 3. 5STORAGESYSTEM............................................................................................................................................ 393.5.1Hill TankFarmStorage ........................................................................................................................... 393.5.2 Complex #6Storage ............................................................................................................................... 403.5.3 StorageSystem Summary ...................................................................................................................... 413.6 BOOSTERSTATIONS ......................................................................................................................................... 413. 6.1Bench BoosterStation ............................................................................................................................ 413. 6.2Hiline BoosterStation ............................................................................................................................ 423.6. 3Complex #6 BoosterStation ................................................................................................................... 433. 6.4 Booster StationSummary ...................................................................................................................... 44 3.7DISTRIBUTIONSYSTEM ..................................................................................................................................... 443.7.1DistributionSystemCriteria ................................................................................................................... 443.7.2 ExistingDistributionLines ...................................................................................................................... 453.7.3FireProtectionRequirements ................................................................................................................ 46 3.7.4 DistributionSystemHydraulicAnalysis .................................................................................................. 483.7.5MaximumDay DemandplusFire FlowDemand (MDD + FFD) .............................................................. 503.7.6PeakHourDemand ................................................................................................................................ 50 3.7.7 PressuresDuring Low Demands ............................................................................................................. 523.8 SYSTEMOPERATION ........................................................................................................................................ 523.9FINANCIAL STATUSOF EXISTING FACILITIES ........................................................................................................... 53 3. 10WATER/ENERGY AUDITS .................................................................................................................................. 53CHAPTER4 NEEDFORPROJECT ..................................................................................................................... 574.1PUBLIC HEALTH .............................................................................................................................................. 574.2EXISTINGINFASTRUCTURE ................................................................................................................................. 574.2. 1Estimated System Losses ....................................................................................................................... 57 4.2.2 FireFlow Conditions ............................................................................................................................... 574.2. 3Storage Evaluation ................................................................................................................................. 574.3 FUTUREWATERDEMAND ................................................................................................................................. 59 4.4COMPLIANCEWITHSTATEANDFEDERAL REGULATIONS .......................................................................................... 61CHAPTER 5ALTERNATIVESANALYSIS ............................................................................................................ 635.1SANITARY SURVEY ........................................................................................................................................... 635.2 NOACTIONALTERNATIVE ................................................................................................................................. 635.3REGIONALIZATION ALTERNATIVE ........................................................................................................................ 635.4 WATERSUPPLYALTERNATIVES .......................................................................................................................... 645.4.1Water SupplyAlternative1 – No ActionAlternative .............................................................................. 645.4.2WaterSupply Alternative2 – Water Conservation ................................................................................ 645.4.3WaterSupplyAlternative3 – Leak DetectionService ............................................................................ 65 5.4.4 Water SupplyAlternative4 – NewWell #7Construction....................................................................... 665.4.5 WaterSupplyAlternative5 – NewWell #8Construction....................................................................... 665.4.6WaterSupplyAlternative6 – NewWell #9Developer Construction ..................................................... 67 5. 5WATERSTORAGE ALTERNATIVES ........................................................................................................................ 675.5.1WaterStorage Alternative1 – No ActionAlternative ............................................................................ 675.5.2WaterStorage January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Pageiii 5. 7OTHERSYSTEM IMPROVEMENTS ........................................................................................................................ 735.7. 1DecommissionWell #1 ........................................................................................................................... 735.7.219771.5 MGTankRoof Repair .............................................................................................................. 745.7.3 BenchBoosterStation Improvements .................................................................................................... 745.7.4DemolishSteelTanksandIncreaseStorage atTank Hill Farm .............................................................. 745.8SYSTEMCLASSIFICATION, STAFFING, & OPERATOR LICENSURE ................................................................................. 755.8. 1Public Participation ................................................................................................................................ 76CHAPTER 6 IMPLEMENTATION & FUNDINGANALYSIS .................................................................................. 796.1 COMMUNITYENGAGEMENT .............................................................................................................................. 79 6.2 PREFERRED ALTERNATIVES & PRIORITY RANKING .................................................................................................. 796.2. 1Priority Rankings .................................................................................................................................... 796. 3CAPITALIMPROVEMENTPLAN ........................................................................................................................... 806. 4SYSTEMOPERATION & MAINTENANCE ................................................................................................................ 84 6.5FUNDINGANALYSIS ......................................................................................................................................... 846.6RATEANALYSIS ............................................................................................................................................... 856.7PROJECTIMPLEMENTATION ANDSCHEDULE ......................................................................................................... 86REFERENCES ......................................................................................................................................................... 88APPENDIX A: COMMUNITYREFERENCEINFORMATION ......................................................................................... A APPENDIXB: WATERRIGHTS ................................................................................................................................. BAPPENDIX C: WATERQUALITYDATAAND January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 5 1. 2 SCOPE The scope of this study includes the following: Base Map o KeyFacilitiesandPipelines January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page7 MCLmaximumcontaminant January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page9CHAPTER2PROJECTPLANNINGThis January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page10Theplanningarea of this study isdefinedbytheestablished ImpactAreaof theCityof Chubbuck. The Cityisbounded on the south bytheCity of Pocatello. The City'spotential growtharea is borderedto January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page11Table2-2TypicalSoilProfilesfor Chubbuck, IdahoClassification Depth, inches DescriptionBahem0- 11Silt Loam11- 49SiltLoam 49-60 ExtremelyCobbly SandBroncho0- 6 CobblyLoam 6-13 Cobbly Loam13- 60 ExtremelyCobbly CoarseSand Broxon0- 8 SiltLoam 8-25 SiltLoam25- 60 Extremely StonySandMcDole0- 21 SiltLoam21-74Silt January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 12 The WildandScenicRiversAct of 1968 serves toprotectdesignatedfree-flowing rivers that have "outstandinglyremarkablescenic, recreational, geologic, fish andwildlife, historic, January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page13towestaredesignated as lying withinthe100-yearfloodplain. Base flood elevationsandhazardfactors havenotbeenestablishedfortheseareas (FederalEmergency ManagementAgency, 2023). AfloodplainmapcanbefoundinFigure2-5 andFIRMmapsareprovidedinAppendixA. Wetlandsweredelineatedby theNationalFishandWildlifeService (U.S. Fish & WildlifeService, 2023). Wetlandslocatedwithinthearea January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 14 intheseareas. Additionalinformationregardingprime farmland, includingamap identifyingareasofprimefarmlandnearthePPPA, canbefound inAppendixA. 2.2.12ProximitytoaSole SourceAquiferAsolesourceaquiferisdefinedbytheIdaho DepartmentofEnvironmentalQualityas: “…anaquiferthathasbeendesignatedbyEPAasthe sole orprincipalsourceofdrinking January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 15Table2-3ClimateDatafor Pocatello, IdahoMonthAverageMaximumTemp (°F) AverageMinimumTemp (°F) AverageTotalPrecipitation ( inches) AverageTotalSnowfall (inches) January32. 515.11.089.1 February38.219.80.9 6.5March47.626. 31.175.4April58.132.81.123.4May68.1 40.21.340.4 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page16 to the stateaverageof $66,474. About8.6% ofthepeoplewere January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page17Table2-5Historical & ProjectedPopulation ofChubbuckYear2.5% GrowthMainCityBench 19702, 9242, 485439 19807, 0525, 9941, 058 1990 7, 791 6,622 1,169 Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Proposed Project Planning Area Chubbuck Water Facility Planning Study Figure 2-3 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure2-3 Proposed Project Planning Area.mxdI 0 1 20. 5 Miles Legend City Limits 2022 Proposed ProjectPlanning Area State Highways Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Chubbuck Area Soils Chubbuck Water Facility Planning Study Figure 2-4 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure2-4 Chubbuck Soils. mxdI 0 1 20. 5 Miles Legend City Limits 2022 Proposed ProjectPlanning Area State Highways Soil Map Unit Description Urban land- bahem-broxon complex Broncho cobbly loam Broxon silt loam McDole variant complex Bahem silt loam Pits, gravel Pocatello silt loam Broncho gravelly loam Delco loam Paniogue loam Paniogue gravelly loam Parehat silt loam Penoyer silt loam Snake silt loam Tickason loam Water Wheeler silt loam 91 I- Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Floodplains Chubbuck Water Facility Planning Study Figure 2-5 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure2-5 Chubbuck FEMA. mxdI 0 1 20.5 Miles Legend CityLimits 2022 Proposed ProjectPlanning Area State Highways FEMA Flood Zones Zone A - Areas of 100- yearflood I- Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Wetlands Chubbuck Water Facility Planning Study Figure 2-6 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure 2-6 Chubbuck Wetlands.mxdI 0 1 20.5 Miles Legend City Limits 2022 Proposed Project Planning Area State Highways Wetland Type Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Lake Riverine I- City of Chubbuck GISCity of Chubbuck Planning and Development, Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Zoning Chubbuck Water Facility Planning Study Figure 2-7 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure2-7 Zoning.mxdI 0 1 20. 5 Miles Legend City Limits 2022 Proposed ProjectPlanning Area State Highways Zoning Agriculture ( A) Single Family Residential(R- 1)Limited Residential (R- 2)Limited Residential - P ( R-2P) Dense Residential (R- 4) Limited Commercial ( C-1) General Commercial (C- 2) Industrial (I) Planned Unit Development(PUD) Creative Community Creative Community- Northside Crossing ( CC-NC)Creative Community- Harvest Springs ( CC-HS) County Highway Cooridor (HC) Village (V) I-86 §¨¦ City of Chubbuck GISCity of Chubbuck Planning and Development, Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Land Use Chubbuck Water Facility Planning Study Figure 2-8 City ofChubbuckDocument Path: J:\222190ChubbuckWFPS\ b_ PLAN\ zGIS\b_ MXDs\Figure 2-8 Land Use.mxdI 0 1 20. 5 Miles Legend City Limits 2022 Proposed Project Planning Area State Highways Landuse Residential Commercial Civic (and utilities)Industrial Agriculture Vacant, approved for development Vacant, undeveloped I- January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page24Figure2-9AdministrativeBoundariesforAreaswithSensitive Air Quality44 (IdahoDepartmentof January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page25CHAPTER3EXISTINGFACILITIES CONDITION & EVALUATIONThischaptersummarizes January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 26 Peak HourDemand (PHD) is usedtorepresentthelargestsingledemandonagivenwatersysteminasinglehour during the year. Similarly, MaximumDay Demand (MDD) andAverage Day Demand (ADD) representthe January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page27Figure3-2ChubbuckMonthlyWaterConsumption (January2018 – December2022) Totalconsumptionvariedby 174milliongallonsperyearfrom2018to2022. Thehighestconsumptionvaluesweremeasured inJulyof2021andappearedtooccurduetotheespeciallyhotanddry summerassummer2021consumptionwasmarginallyhigherthanpreviousyears. Thelower valleys in the figure above occur January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 28 ADD wasnotdetermined by thetimeofthisstudy. WhencomparingtheADDofChubbuck tothatoftherestoftheStateofIdahoand theUnitedStates, the5-yearADDofChubbuckisabout5% greater thantherestoftheStateofIdaho, andabout twoanda halftimeshigherthantheaverage value forthe United States. The higher demandscan be aresult of higher-than- normal outdoorwater use byCity residents potentiallydue to larger lots and drier conditions than is foundelsewhere inIdaho andthe UnitedStates. Table 3-1ExistingDemandsSummary Criteria DemandsDemandFactorGPDGPM GPCDAvg. Annual January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page293.2.3 Water RightsWater rights heldbytheCityofChubbuckaresummarized in Table3-2. AppendixBcontainsmoreinformation regarding thesewaterrights. Table3-2WaterRights Water RightUseConditionsUseDateDiversionRate (CFS) Diversion Rate (gpm) TotalVolume (AFA) 29-2385Municipal - 1/1-12/310.78350.06NA 29-2413Municipal - 1/1-12/311.10 493.68NA29-2469Municipal - 1/1-12/31 1.11498.17NA29-7624Municipal - 1/1- 12/314.962226.05NA29- 8188 Municipal - 1/1-12/316.70 3006.96NA29-8229Municipal - 1/1-12/31 1.74780.91NA29-8230Municipal - 1/1- 12/312.21991.85NA29-14012Municipal Irrigation 4/1 - 10/311.83821.30488. 80 29-14013MunicipalIrrigation4/1 - 10/312. 25 1009.80651.2029-14016MunicipalIrrigation4/ 15 - 10/151.76789.89449.2029- 14016 MitigationIrrigation4/15 - 10/150.1358. 34 33.8029-14054MunicipalIrrigation4/1 - 10/ 31 1.47659.74491.6029-14055Municipal Irrigation 4/1 - 10/310.1358.3426. 40 29-14056MunicipalIrrigation5/1 - 10/150. 0940.3918.8029- 14058MunicipalIrrigation4/1 - 10/ January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 32 tooxidizeconstituentssuchas January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 34 3.3.3GroundwaterQuality January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page35Figure3- January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page39Well #6complexcomprises theWell #6facility, a1. 5-million-gallonconcrete storagetank, anda 4,200 gpmbooster station. The facilitywas alsodesignedtoaccommodate future publicaccessaroundtheexteriorof January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 40around1960andis January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 413.5.3Storage SystemSummary Thetotal capacityofallfour storagetanks is 3,125, 000gallons. Summarizedin Table 3- 5ExistingStorage Capacitiesarethecapacities, year built, material, andconditionof January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 42Figure3-13Bench January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 43Figure3-14HilineBooster January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 44Figure3-15Complex # 6Booster Station3. 6.4Booster StationSummaryTable 3-6 belowprovides asummary of thenormaloperatingcapacityand totalcapacityofthe boosterstations. Table3-6Existing Booster Station CapacitiesBoosterStationFirmCapacity (gpm) TotalCapacity (gpm) Bench2,2002, 500 Hiline 2,6004,400HilineFuture (2additionalpumps)16,2008, January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 45 Normaloperatingpressuresshould typically range between60and90psi. Pressuresabove100psi shouldbecontrolledwith pressure reducing valves installedonthedistributionmain7. Higherpressurestypically increasethe amount of waterlostduetoleakageandthepotentialfor watermain breaks. In systems thatrelyonpumpingtosupplementorprovide January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 46incorporates the areaeastofHilineRoadand northofInterstate86. TheBenchorupper pressure zoneissuppliedbyHilineand Bench BoosterStations. Thenormaloperatingpressures in thebenchpressurezonearetypically between 58and98psiandare constantly maintainedbytheboosterstationpumps. The mainorlowerpressurezoneserves the majorityoftheCitywestof Hiline Road, northofInterstate86to ReservationRoad, areasouthofInterstate 86nearWalmart, andissupplied by all5Wellswithaprimary transmissionlinefromtheTankFarmalong Venture Way intothedistributionnetwork. January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 47 duringaMDDandfireeventtominimizethe riskofcontaminationto the water system11. Pumpingsystemssupportingfireflowcapacitymustbe designedso January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 48Table3-9ISRBFire Flow Requirements Location RequiredFlow (gpm) ModeledFireFlowAvailable (gpm) StaticPressure (psi) Residual January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page49 Model Calibration Model calibration refersto theprocess ofadjusting modelparameters, sothat modeloutputs matchobserved January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 50 The calibrationresultedinamodelthatreflectstheactual conditionsofthewatersystem. The January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 52 Figure3-18ModelingPeak HourDemands (SouthernHalf) 3.7.7PressuresDuringLowDemandsBecausewaterdemandsdecrease January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 53 3.9FINANCIALSTATUSOF UT UT UT Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Distribution System Pipe Size Chubbuck Water Facility Planning Study Figure 3-19 City ofChubbuckDocument Path: J:\222190 ChubbuckWFPS\b_ PLAN\ zGIS\ b_ MXDs\ Figure 3- 19 Chubbuck Distribution System Pipe Size. mxdI 0 0. 5 10. 25 Miles Legend BPS Wells UT Tanks Pipe Size Unkown 1" 2"4" 6"8"10"12" 14"16" UT UT UT Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Distribution System Pipe Material Chubbuck Water Facility Planning Study Figure 3-20 City ofChubbuckDocument Path: J:\222190 ChubbuckWFPS\b_ PLAN\ zGIS\ b_ MXDs\ Figure 3- 20 Chubbuck Distribution System Material. mxdI 0 0. 5 10. 25 Miles Legend BPS Wells UT Tanks Asbestos Cement Cast IronConcreteCopperDuctile Iron Galvanized UT UT UT Well 6 Well 1 Well 5 Well 3 Well 4 Well 2 Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Fire Flow Results (2021 MDD + FFD) Chubbuck Water Facility Planning Study Figure 3-21 City ofChubbuckDocument Path: J:\222190 ChubbuckWFPS\b_ PLAN\ zGIS\ b_ MXDs\ Figure 3- 21 Fire Flows. mxdI 0 0. 5 10. 25 Miles Legend BPS Wells UT Tanks MeetsFFD Fail Pass Unknown 1" 2"4" 6"8"10"12" 14"16" 18"20"22"24" 250 FT January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page57CHAPTER4 NEEDFORPROJECT4. 1PUBLICHEALTHThereareno environmental conditions intheplanningarea thatneedtobeaddressedwithregardtopublichealth. 4.2EXISTINGINFASTRUCTUREIssueswithinthe City’scurrentwatersystem January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page58 Peakingstorageisquantifiedby the volumeofwaterconsumedby theCity duringhigh demandtimesofday thatexceedthe firmcapacityofthe system’ssources. PeakingstorageisafunctionoftheCity’ sdiurnal demandpattern. Fire suppression storageisthevolumerequired for City fire protectiontofightafireattheflowsanddurationrecommendedbylocalfiremarshal, theinternational firecode, ortheIdahoSurveyingandRatingBureau (ISRB). Therangeofflowsandlocationsrequiring theseflows January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page594.3FUTURE WATERDEMANDPopulationprojectionspresentedinSection2.3havebeenusedtoestimatefuturedemandscenarios. If January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page60Table4-2RecommendedStorageVolumes (~20, 000Population) StorageComponentMinRecommended (gal.) Comments OperationalStorage468, 750Use 15% to keepwaterin tanksfromstagnationTotal Storage3,125, 000 % ofTotal15% PeakingStorage1,826,543Usedtomeetpeakdemandhour withall firmpumpsrunning Peak Demand - FirmCap. FireStorage1, 440, 000RKMotelsLLC FireDemand (gpm) 6,000Duration (hrs.) 4Emergency StandbyStorage 0BackuppowerprovidedatWells # 4, #5, and #6to meetADD ADD (gpm) 2893 Duration8Total3, 735,29319. 53% UnderCapacityTable 4-3Recommended StorageVolumes (~21,500Population) Storage ComponentMin Recommended (gal.) CommentsOperationalStorage 468,750Use15% tokeepwater in tanksfromstagnationTotal January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page61Table4-4RecommendedStorageVolumes (~27, 000Population) StorageComponentMinRecommended (gal.) Comments OperationalStorage468,750Use 15% to keepwaterin tanksfromstagnationTotal Storage3,125, 000 % ofTotal15% PeakingStorage3,734,106Usedtomeetpeakdemandhour withall firmpumpsrunning Peak Demand - FirmCap. FireStorage1, 440, 000RKMotelsLLC Fire Demand (gpm) 6,000Duration (hrs.) 4 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 63CHAPTER5 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page64EnvironmentalImpacts: Construction ofthisalternativewouldimpactamoderateamountofpropertytoconnectChubbucktothePocatellowater system. 5.4WATERSUPPLYALTERNATIVESAwaterdistributionsystem must bedesignedtomeetthePHDorthe January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page65expendituresrelatedtoadditionalsourcecapacityuntilmoreresidents are availabletosharethecosts. Anenhancedwaterconservation January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 66 materialstodothisserviceinhouse, costscould vary from thosepresentedabove. EnvironmentalImpacts: Utilizingaleakdetection January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 67 5.4.6WaterSupplyAlternative6 – NewWell #9 DeveloperConstructionParalleltoWell # 8, theforeseeabledemandforthegrowingEastBenchZoneeastofI- 15 suggests thata9thwellmaybecomeanecessity. While the development ofthisareaiscurrentlyunderdiscussionand January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 68 storage. Theamountofemergencystorageistypicallyset January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page695.6WATERDISTRIBUTIONSYSTEMALTERNATIVESWatersupplyandstoragealternativesareonlyasusefulas the distribution systemwhichconveystheproducedandstored water throughout the City. TheCityofChubbuckhasa January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page71ThePhaseIIimprovementsinvolvetheinstallationofapproximately14,000ft. of new16-InchPVCwaterlinesasshowninTable5-3, andshownin January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page72Theimprovementscoveredinthisphasewillbettermaintainwaterpressuresand January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page73Table5-6 DistributionFireFlowImprovementsPipeFrom To ApproximateLength (ft.) Diameter (inch) MoranStreetBrundageStreetEndofMoran7008ChubbuckElementarySchool Hawthorne January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page74systemwithactivewatersupplythatisvalved closed. The well hasalreadybeenevaluated and determined that thewellcasingisirreparableandisnotinthe January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page 75EnvironmentalImpacts: Asthelocation of thetankwillexistonthecurrentsteeltank locationandisalreadydisturbedland for municipalwateruseitis notexpectedtohavesignificantenvironmentalimpacts. 5.8SYSTEMCLASSIFICATION, STAFFING, & OPERATOR LICENSURE Idaho DEQclassifiesdrinkingwatersystemsintotwolevels: treatmentanddistribution, andthecomplexityofeachsystemisevaluatedseparately. ClassificationworksheetscanbefoundonIdahoDEQ’swebsite (Idaho Dept. ofEnvironmentalQuality, 2021). Thedistributionsystemisevaluatedbasedon the populationservedbythesystem. Thebreakdownofpopulationisshown in Table5-7Table5-7IdahoDEQDistributionSystem Classification ClassificationPopulationVerySmallPublicDrinkingWaterSystem * See January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page765.8.1 15 86 Well #2 Well #4 Well #3 Well #5 Well #1 Abandoned) Well #6 Well #7 Well #8 Well #9 Developer) Maxar Figure 5-1 Chubbuck Water Facility Planning Study Proposed Distribution Improvements City of Chubbuck Tyhee Rd. Siphon Rd. Rio Vista Rd.Philbin Rd.YellowstoneAve. Chubbuck Rd. Hawthorne Rd. Hiline Rd.0 0.5 10. 25 Miles Legend Wells Existing Population 16,000 Population 30,000 Booster Stations Existing Population 16,000 Population 25,000 Population 30,000 Tanks Existing Population 16,000 Population 25,000 Population 30,000 Transmission Improvements Population 16,000 Population 20, 000 Population 25, 000 Population 30,000 Fire Improvements Fire Improvement Failed Fire Flow Other Improvements Booster Station Tank UT UT UT Well 6 Well 1 Well 5 Well 3 Well 4 Well 2 Source: Esri, Maxar, Earthstar Geographics, and the GIS UserCommunityFireFlowResultswithImprovedLines (2021 MDD + FFD) Chubbuck Water Facility Planning Study Figure 5-2 City ofChubbuckDocument Path: J:\222190 ChubbuckWFPS\b_ PLAN\ zGIS\ b_ MXDs\ Figure 5- 2 Fire Flow Improved.mxdI 0 0.5 10. 25 Miles Legend BPS Wells UT Tanks MeetsFFD FailPass Water_Main_ Lines 250 FT Range January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page79CHAPTER6 IMPLEMENTATION & FUNDINGANALYSIS6.1COMMUNITY ENGAGEMENTCommunityengagementinthe January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page80recommendedtoconstructthenewgroundwaterWell #7andboosterstationtomeet theprojectedMDDwhenthepopulationnears21,000. Astheareawillalreadybedisturbedand thiscomplexcanbedesigned January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page846.4 January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page85 (LMI) of January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page86 Table 6-2 Funding ScenariosforPriorityIImprovements PriorityI ImprovementsPriorityI Improvements 30-yr @2.0% Self-Funded Total ProjectCost $13,805,000 $13,805,000CDBG Grant - Estimate $ 0 $0USACE Grant - Estimate $500,000 $ 0DEQPrincipalForgiveness - Estimate 0.0% $0. 00 $0.00 LoanAmount $13,305,000 $13,805, 000AnnualLoanPayment* $594, 067 $460,167Annual DebtService Reserve10% $59,407 $0O& M Increase, estimated $45,000 $45,000SLAReserve, estimated $10,000 $10,000TotalAnnualCost $708,474 $506,1832022RateBeforeRate Study $24.00 $24.00EstimatedMonthlyRateIncrease $11.81 $8.44EstimatedBaseRateper1" Connection $35.81 $32.44 *Theestimatehereinis based onourperceptionofcurrentconditionsattheprojectlocationand5,000EDU’s. Thisestimate reflectsouropinionofprobablecostsatthistimeandissubjecttochangeastheprojectdesignmatures. KellerAssociates hasnocontrolovervariancesinthe cost oflabor, materials, equipment, services Improvement 8-Inch Improvement 8-Inch Improvement 8-Inch Improvement 8-Inch Improvement 10-Inch Improvement 10-Inch Improvement8- InchImprovement 8- Inch Improvement 8- Inch Improvement8-InchImprovement 8-InchImprovement1C16-InchImproveme n t 10- Inch Improvement 4A16-InchImprovement 3B16-InchImprovement 8-Inch Improvement 3C16- InchImprovement 3D 16-InchImprovement2C16-InchImprovement2B16-InchImprovement2D16-InchImprovement 4C16-InchImprovement1B12-InchImprovement3A 16-Inch Improvement 4D16- InchImprovement 2A16- InchImpr o veme n t 3 E 18- I n c h Improvement 4E 16-Inch 15 86 Maxar Figure 6-1Chubbuck Water CIP City of Chubbuck Tyhee Rd.Siphon Rd.Rio Vista Rd.Philbin Rd. Yellowstone Ave.Chubbuck Rd. Hawthorne Rd. Hiline Rd.Well #6, Tank, & BPS Well # 4 Well #5 Well #2 Well #3 Hiline BPS Improvement1AWell # 7, Tank, & BPS Decommission Well #1 Improvement Bench Booster Station Improvement Improvement 3F 1.5 MG Developer Tank Improvement 4F Developer Well # 9 Improvement 4B Well #8 0 0.5 10.25 Miles Legend Wells Existing Population 16, 000 Population 30, 000 Booster Stations Existing Population 16, 000 Population 25,000 Population 30,000 Tanks Existing Population 16,000 Population 25,000 Population 30,000 Transmission Improvements Population 16, 000 Population 20,000 Population 25,000 Population 30, 000 Fire Improvements Fire Improvement Failed Fire Flow Other Improvements Well Booster Station Tank Approximate City Limit USA Major Roads 2022 Existing System City should continue practice of obtaining additional rights with January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page88REFERENCES2023Consumer ConfidenceReportCityofChubbuck. (2023). CityofChubbuckwaterandWasteWater. Chubbuck: CityofChubbuck. Retrieved fromCityofChubbuck: January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page89IdahoDept. ofEnvironmentalQuality. ( 2023, Feburary07). IDAPA58.01.08 IdahoRulesforPublicDrinkingWaterSystems. RetrievedJanuary16, 2014, from IdahoOfficeoftheAdministrativeRulesCoordinator: http://adminrules.idaho.gov/rules/current/ 58/index.html IdahoDept. of EnvironmentalQuality. (2023, January25). SoleSource. RetrievedJanuary9, 2014, fromAquifers: https://www.deq.idaho.gov/water-quality/ground- January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000 Page90https://www.epa.gov/ground-water-and-drinking-water/national-primary- drinking-water-regulationsU.S. EnvironmentalProtectionAgency. (2023, Feburary7). NationalPrimaryDrinkingWaterRegulations. January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy 222190-000FAPPENDIX January2025 CityofChubbuck Water FacilitiesPlanningStudy January2025 CityofChubbuck Water FacilitiesPlanningStudy