Clinton - Oakland Sewage Disposal System

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Clinton - OaklandSewage Disposal SystemSRF Project PlanJune 26, 2012ARCHITECTS ENGINEERS PLANNERS ARCHITECTS ENGINEERS PLANNERS ARCHITECTS ENGINEERS PLANNERS ARCHITECTSOakland County WaterResources CommissionerPublic Works BuildingOne Public Works DriveWaterford, MI 48328OHM is a firm of architects, engineers and planners committedto Advancing Communities. Leaders rely on OHM’s provenpublic and private sector expertise, insightful counsel andforward thinking to create thriving places for people. Integrity – We stand behind our work Dedication – Do what it takes People Caring Organization Teamwork – Desire to be a valued member of your team

Table of Contents1-Introduction2-Project Background3-Analysis of Alternatives4-Selected Alternatives5-Evaluation of Environmental Impacts6-Mitigation7-Public ParticipationTable of AppendicesA-Industrial User ListB-Regulatory CorrespondenceC-Technical MemorandaD-Detailed Cost Estimates / Present Worth AnalysesE-Public Hearing InformationF-Resolution Adopting Final Project PlanG-Agency Letters / Project Correspondence2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal Systemi

Section 1 – Introduction1.1Project IntroductionThe Clinton-Oakland Sewage Disposal System (COSDS) is a regional sewer service district that serves12 communities in central and northern Oakland County. The Oakland County Water ResourcesCommissioner (WRC) owns, operates, and is responsible for all maintenance, operation, andadministration of the WRC interceptor sewers that serve the district. At this time, a number of systemimprovements are needed in the COSDS to bring the system into compliance with an existing DistrictCompliance Agreement (DCA) and, to eliminate periodic SSOs, and resolve capacity issues. This 2012Project Plan was prepared on behalf of the WRC for the purpose of obtaining State Revolving Fund(SRF) loans from the Michigan Department of Environmental Quality (MDEQ) for the construction ofimprovements to the COSDS.This 2012 SRF Project Plan examines the needs of the wastewater facilities within the COSDS over aplanning period of 20 years, with a focus on the projects that are proposed to begin construction withinthe next five-year planning period of 2013 to 2018. These projects have been identified as PriorityProjects and are listed below: 5.5 million gallon Storage Retention Tank (SRT) - Elizabeth Lake Pump Station / Site #7Perry Street Diversion to the City of Pontiac Wastewater Treatment Plant2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System1-1

Section 2 – Project Background2.1Study Area Characteristics2.1.1 Delineation of Study AreaThe COSDS provides sanitary sewer service to 12 cities, villages and townships (CVTs) andincludes a regional interceptor system approximately 57 miles in length. The COSDS service areaincludes all or part of the Cities of Auburn Hills, Rochester Hills, Rochester, and Lake Angelus; theTownships of Independence, Waterford, West Bloomfield, Oakland, Orion, and Oxford; and theVillages of Clarkston, Lake Orion, and Oxford. Figure 2-1 shows the entire COSDS, including theservice district and the main interceptors. The activities proposed within this Project Plan arefocused on a key hydraulic bottleneck identified downstream of the Elizabeth Lake Pump Station(ELPS). Figure 2-2 illustrates the component of the COSDS that is the focus of the Project Plan.Figure 2-1 - COSDS Service Area2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-1

Figure 2-2 - Study Area with Proposed Projectsa) Lakes, Rivers, Ponds, and WetlandsThe general locations of wetlands are shown in relation to the proposed project locationsaccording to data from the National Wetlands Inventory (NWI) (Figure 2-3). An official fieldreview would need to be performed during design of the project to determine the presence orabsence of any potentially regulated Part 303 of Public Act 451 of 1994, as amended wetlands.b) Existing Treatment FacilitiesWastewater from the COSDS is transported to the Oakland-Macomb Interceptor Drain (OMID),which ultimately discharges to the Detroit Water and Sewerage Department (DWSD) fortreatment and subsequent discharge to the Detroit River. It consists of two interceptor subsystems referred to as the Clinton-Oakland and the Paint Creek interceptors.c) Effluent Disposal LocationsAll wastewater from the COSDS is treated at the City of Detroit’s Wastewater Treatment Plantand discharged to the Detroit River.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-2

Figure 2-3 - Lakes, Rivers, Ponds and Wetlands2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-3

CharterTo w n s h i pof OaklandCharterTo w n s h i pof OrionCharterTo w n s h i p o fIndependenceFIGURE 2-3Lakes, Rivers,Ponds & WetlandsOAKLAND COUNTY WATER RESOURCES COMMISSIONERCity ofLakeAngelus! ProposedPump StationCity ofAuburnHills! CharterTo w n s h i p o fWa t e r f o rdProposed Pump StationProposed SRTCity ofRochesterHillsJ Pontiac WWTP! Elizabeth Lake Pump StationProposed ImprovementCOSDS InterceptorMajor RoadProposedSRTRiver, Stream, DrainCity ofPontiacLakeDetention/Retention PondELPSPontiacWWTP! J WetlandMunicipal BoundaryCOSDS Service Area0City ofSylvanLakeC h a r t e r To w n s h i po f We s tBloomfieldCityo f Tr o yCharterTo w n s h i p o fBloomfieldFeet12,0006,000uSource: Data provided by Washtenaw County and the City of Ann Arbor.Orchard, Hiltz and McCliment does not warrant the accuracy of the dataand/or the map. This document is intended to depict the approximatespatial location of the mapped features within the Community and all use isstrictly at the user’s own risk.Coordinate System: Michigan South NAD 1983 State Plane InternationalFeetMap Published: May 16, 2012City ofOrchardLake VillageCLINTON OAKLAND SEWAGE DISPOSAL SYSTEMCity ofBloomfieldHills888.522.6711 ohm-advisors.com

d) Sludge Disposal SitesThere are no sludge disposal sites in the COSDS. Any dewatered solids left over from thevactor operations are landfilled outside the COSDS.e) Existing interceptors, collectors, pumping stations, and force mains.The existing COSDS consists of two major interceptors, the Paint Creek and the ClintonOakland interceptors. Figure 2-1 shows the COSDS district boundaries, pump station andinterceptor network.f)Population distributionThe total residential population of the COSDS service area in the year 2010 was estimated to be241,519. Total equivalent populations, which include equivalent values for commercial andindustrial areas, are currently estimated at 291,895. The population distribution, by community,is listed in Table 2-1.g) Parks and recreation areasSee Figure 2-4 for locations of major park and recreation areas within the COSDS.2.1.2Land Use in Study Areaa) Current UseThe existing land use for the communities in the COSDS is summarized in Table 2-2. Land use forthe entire COSDS service area is largely residential with some commercial/industrial and little to noagriculture. Figure 2-5 shows a graphical depiction of the existing zoning and land use in theCOSDS.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-4

Table 2-1 - Population Data for the COSDS CommunitiesResidentialEquivalentPopulationNon ResidentialEquivalentPopulationTotal Equivalent16,720016,720City of Lake Angelus2900290Waterford Township72,409072,409West Bloomfield Township20,550020,550City of Auburn Hills14,81639,02953,845Orion Township18,67411,34730,021Lake Orion Village2,77702,777Oakland Township7,19307,193Oxford Township5,95305,953Village of Oxford3,30203,302City of Rochester Hills67,925067,925City of yIndependence Township /Village of ClarkstonTOTALSPopulation* Current population includes only the population tributary to the COSDS Interceptor2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-5

CharterTo w n s h i pof OaklandCharterTo w n s h i pof OrionCharterTo w n s h i p o fIndependenceFIGURE 2-4Pa r ks &Re c r e a t i onOAKLAND COUNTY WATER RESOURCES COMMISSIONERCity ofLakeAngelusProposedPump StationCity ofAuburnHills! CharterTo w n s h i p o fWa t e r f o rdJ Pontiac WWTP! Elizabeth Lake Pump Station! Proposed Pump StationProposed SRTCity ofRochesterHillsProposed ImprovementCOSDS InterceptorProposedSRTMajor RoadRecreation LandCountyCity ofPontiacEducational FacilityMunicipalityELPSPontiacWWTP! Private OwnerJ State of MichiganMunicipal BoundaryCOSDS Service Area0City ofSylvanLakeC h a r t e r To w n s h i po f We s tBloomfieldCityo f Tr o yCharterTo w n s h i p o fBloomfieldFeet12,0006,000uSource: Data provided by Washtenaw County and the City of Ann Arbor.Orchard, Hiltz and McCliment does not warrant the accuracy of the dataand/or the map. This document is intended to depict the approximatespatial location of the mapped features within the Community and all use isstrictly at the user’s own risk.Coordinate System: Michigan South NAD 1983 State Plane InternationalFeetMap Published: May 16, 2012City ofOrchardLake VillageCLINTON OAKLAND SEWAGE DISPOSAL SYSTEMCity ofBloomfieldHills888.522.6711 ohm-advisors.com

CharterTo w n s h i pof OaklandCharterTo w n s h i pof OrionCharterTo w n s h i p o fIndependenceFIGURE 2-5Existing Land Cover& Land UseOAKLAND COUNTY WATER RESOURCES COMMISSIONERCity ofLakeAngelusProposedPump StationJ Pontiac WWTP! Elizabeth Lake Pump Station! Proposed Pump StationProposed SRTProposed ImprovementCity ofAuburnHills! COSDS InterceptorMajor RoadCity ofRochesterHillsMunicipal BoundaryLakeProposedSRTDetention/Retention PondWetlandCity ofPontiacCharterTo w n s h i p o fWa t e r f o rdResidentialMulti-Family ResidentialELPSPontiacWWTP! J CommercialOpen SpaceIndustrialUtility0City ofSylvanLakeC h a r t e r To w n s h i po f We s tBloomfieldCityo f Tr o yCharterTo w n s h i p o fBloomfieldFeet12,0006,000uSource: Data provided by Washtenaw County and the City of Ann Arbor.Orchard, Hiltz and McCliment does not warrant the accuracy of the dataand/or the map. This document is intended to depict the approximatespatial location of the mapped features within the Community and all use isstrictly at the user’s own risk.Coordinate System: Michigan South NAD 1983 State Plane InternationalFeetMap Published: May 16, 2012City ofOrchardLake VillageCLINTON OAKLAND SEWAGE DISPOSAL SYSTEMCity ofBloomfieldHills888.522.6711 ohm-advisors.com

Table 2-2 - Land Use by hipVillage ofClarkstonWaterfordTownshipWest BloomfieldTownshipCity of AuburnHillsOrion TownshipLake OrionVillageOaklandTownshipOxfordTownshipVillage of OxfordCity ofRochester HillsCity ofRochesterCity of LakeAngelusLand Use * .442.2* Data provided by SEMCOG, based on 2008 land useb) Predicted Land UseThe predicted future land use within the service area is anticipated to follow existing patterns andtrends with moderate growth expected in the northern part of Oakland County. This growth will addflows to the COSDS interceptor.2.1.3Surface and Ground WatersThe southern portion of the COSDS, including West Bloomfield, Orion Township, Lake Orion Villageand Rochester Hills, utilizes drinking water from the extensive distribution system from the City of2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-8

Detroit Water and Sewerage Department (DWSD) System. The remainder of the COSDS study areautilizes either individual private wells or a community water system.The vast majority of the COSDS lies within the Clinton River watershed. A small portion of the studyarea is located in the headwaters of the Rouge River. The Rouge and Clinton Rivers are both EPAGreat Lakes Areas of Concern. Both watersheds are covered by a Total Maximum Daily Load(TMDL) for E. coli and the Rouge River also has a TMDL for biota.The Clinton River and its tributaries are used for recreational activities, including canoeing, kayaking,fishing and other passive uses. Each municipality in the COSDS, as well as Oakland County,maintain MS4 storm water permit coverage and participate in collaborative watershed managementefforts with the various subwatershed advisory groups.Economic Characteristicsa) Economic Structure and Major EmployersTable 2-3 lists the major employment categories and employment distribution for the COSDScommunities.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-9

Table 2-3 - Current Job Estimates by Industry (SEMCOG, 2005)WestCity ofLakeCity ofCity ofIndependenceVillage Village ofRochesterCity C8973676,9301,0260Wholesale Trade12907812863,008170CC10928854710Retail ,9335890C04C5,6840C00CC00Natural Resources &MiningTransportation &InformationFinancial ActivitiesProfessional, Scientific,& Technical ServicesManagement ofCompanies &EnterprisesAdministrative, Support,& Waste 1,8584,1261,651753306923531104,4876710Leisure & 01,8613,1361,61329,7795,89721Education ServicesHealth Care & SocialOther ServicesPublic AdministrationTotalNote: "C" indicates data blocked due to confidentiality concerns of ES-202 files.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-10

b) Median Annual Household IncomeMedian annual household income, as well as the percentage of households in poverty, for theCOSDS communities is listed in Table 2-4. This information was taken from the 2010 Census dataor latest available estimates.Table 2-4 - Median annual household income and percentage of households in povertyMedian HouseholdCommunityIndependenceTownshipVillage ofClarkstonWaterfordTownshipWest BloomfieldTownshipCity of AuburnHillsOrion TownshipLake OrionVillageOaklandTownshipOxfordTownshipVillage of OxfordCity ofRochester HillsCity ofRochesterCity of LakeAngelusIncomeHouseholds in Poverty 80,5362.5% 57,7865.6% 55,5739.9% 99,7132.7% 49,55813.4% 78,1553.2% 48,7974.6% 110,9972.6% 69,0714.3% 59,3975.8% 78,0866.5% 76,6036.2% 131,0783.3%2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-11

Table 2-5 lists the jobs forecast for the COSDS communities for years 2010 and 2035. Source:SEMCOG 2035 Forecast.Table 2-5 - Jobs ForecastJobs ForecastCommunityIndependenceTownshipVillage ofClarkstonWaterfordTownshipWest BloomfieldTownshipCity of AuburnHillsOrion TownshipLake OrionVillageOaklandTownshipOxfordTownshipVillage of OxfordCity ofRochester HillsCity ofRochesterCity of ) Economic Characteristics Affecting Population GrowthThe recent economic downturn has resulted in a very slight decrease in water and wastewaterusage in the COSDS. The current economic forecast, as indicated by the job forecast, showssteady, gradual growth through 2030. Therefore, it is anticipated that wastewater needs will remainrelatively constant through the planning period.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-12

2.2 Existing Facilities2.2.1Method of Wastewater TreatmentWastewater from the COSDS is discharged to the Oakland Macomb Interceptor Drain (OMID) withultimate discharge to the DWSD system for treatment at the Detroit Wastewater Treatment Plant.The Detroit WWTP uses an activated sludge treatment process and discharges treated effluent tothe Detroit River.The City of Pontiac Wastewater Treatment Plant (COP WWTP) is near the COSDS interceptor,although it currently receives no flow from the COSDS. Given the recent downward trend inpopulation within the City of Pontiac, the COP WWTP has spare treatment capacity and can acceptsome wastewater flow from the COSDS interceptor. Recently, the WRC and the City of Pontiacreached an agreement to allow a partial diversion from the COSDS interceptor to the COP WWTP.This scenario is beneficial to both the City of Pontiac and the COSDS communities, as it reducesreliance on DWSD and takes advantage of local treatment opportunities. This will have an overallpositive economic benefit on the City of Pontiac and the communities tributary to the COSDS.2.2.2Method of Sludge Handling and DisposalWith the exception of vactor spoils, the vast majority of solids are transported through theinterceptor system to the City of Detroit. Any solids removed from the sewer system during routineinspection and maintenance are taken to the WRC septage disposal site in Pontiac (located outsidethe limits of the COSDS). There, they are dried and sent to a landfill for disposal.2.2.3Type of Collection FacilitiesThe original Clinton Oakland System was constructed in the late 1960s and early 1970s. It consistsof two interceptor sub-systems referred to as the Clinton-Oakland and the Paint Creek interceptors.Both interceptors have flow capacities ranging from 2 cfs to 200 cfs depending on the diameter andslope of the specific section of the interceptor. There is also the Gibson-Avon Arm, which collectssanitary sewage from a portion of the City of Rochester Hills. The hydraulic capacity of thedownstream end of the Gibson-Avon system is approximately 26 cfs.Local sanitary collector sewers are owned and operated by the individual communities within theCOSDS.The WRC maintains the interceptor system through a rigorous 7-year rotating maintenance programthat includes sewer televising, cleaning, inspection and repair. Any issues identified during theinspection process are programmed for maintenance and are promptly resolved.2012 SRF Project PlanWRC - Clinton-Oakland Sewage Disposal System2-13

2.2.4Facilities LocationsFigure 2-1 shows the location of the COSDS Interceptor sewer and the Elizabeth Lake Pump Station(ELPS), which is the only pumping facility along the COSDS Interceptor. A list of industrial users,along with their NPDES permit numbers, is included in Appendix A.2.2.5Design Capacity, Existing Flows and Waste CharacteristicsThe COSDS contract outlet capacity (which includes flow from the Clinton Oakland and Gibson Arminterceptors) is 140 cfs. The recently signed agreement between the COSDS and the OMID, definesthis maximum allowable flow as the COSDS component at the OMID outlet. Current average dryweather flow for the system is approximately 47.7 cfs. Wastes discharged to the COSDS are typicalof municipal sewage.2.2.6SeptageThere is one septage receiving facility in the COSDS. It is located on Oakland Avenue in Pontiac.This facility is used by the WRC, several municipalities and licensed septage haulers.2.2.7Industrial DischargesA list of industrial users and their associated NPDES permit numbers is located in Appendix A.2.2.8Average and Peak Dry and Wet Weather FlowsAverage and peak dry weather flows for the COSDS are approximately 47.7 cfs and 70.0 cfs,respectively.2.2.9Infiltration and Inflow ProblemsThe WRC tracks inflow and infiltration through its extensive meter network in the COSDS. There areover 45 high accuracy meters that are utilized for flow meter based billing. Quarterly analysis ofthese meters includes tracking nighttime infiltration and wet

Section 1 – Introduction 1.1 Project Introduction The Clinton-Oakland Sewage Disposal System (COSDS) is a regional sewer service district that serves 12 communities in central and northern Oakland County. The Oakland County Water Resources Commissioner (WRC) owns, operate

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