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Successfully Developing & Managing W t t Pi li / M h l C ditiWastewater Pipeline/ Manhole Condition Assessment & Rehabilitation Programs
Presented from a municipal perspective…
Presented byPresented by::Jeff Maier, P.E.Jeff Maier, P.E.
Metro Wastewater Reclamation DistrictMetro Wastewater Reclamation DistrictDenver, ColoradoDenver, Colorado
The challenges municipalities are facing:The challenges municipalities are facing: ASCE’s ASCE’s 2009 Report Card for America’s 2009 Report Card for America’s
Infrastructure:Infrastructure:G d f W t t I f t t i “DG d f W t t I f t t i “D ””Grade for Wastewater Infrastructure is a “D Grade for Wastewater Infrastructure is a “D ––””
Cost effective asset management programs areCost effective asset management programs are Cost effective asset management programs are Cost effective asset management programs are more important than evermore important than ever
Doing more with less is the new normalDoing more with less is the new normal
Tighter EPA & CDPHE regulationsTighter EPA & CDPHE regulations Tighter EPA & CDPHE regulationsTighter EPA & CDPHE regulations
Funding issues & aging systemsFunding issues & aging systemsg g g yg g g y
The importance of condition assessment The importance of condition assessment and rehabilitationand rehabilitationand rehabilitationand rehabilitation
Understanding your system is vital Understanding your system is vital –– wastewater wastewater infrastructure is crumbling!infrastructure is crumbling!
Out of site, out of mind is no longer acceptableOut of site, out of mind is no longer acceptable
Critical component of successful asset management and Critical component of successful asset management and budgetingbudgeting
Regulatory compliance issuesRegulatory compliance issues
O ti & M i t i tO ti & M i t i t Operation & Maintenance requirementsOperation & Maintenance requirements
Knowledge about your system = good decision makingKnowledge about your system = good decision making
Benefits of effective condition assessment Benefits of effective condition assessment d h bilit tid h bilit tiand rehabilitationand rehabilitation
Reduces overflows, violations & failuresReduces overflows, violations & failures Reduces overflows, violations & failuresReduces overflows, violations & failures
Prioritizes repair and maintenance effortsPrioritizes repair and maintenance efforts
Reduces emergency repairs or dig & replaceReduces emergency repairs or dig & replace
Modern technologies utilize trenchless condition Modern technologies utilize trenchless condition assessment and rehabilitation techniquesassessment and rehabilitation techniques
Can save a lot of money!Can save a lot of money!
Attributes of a successful condition Attributes of a successful condition t & h bt & h bassessment & rehab programassessment & rehab program
Goals and responsibilities are definedGoals and responsibilities are defined Goals and responsibilities are definedGoals and responsibilities are defined Organized & methodicalOrganized & methodical Administered by qualified staff and/or consultantsAdministered by qualified staff and/or consultants Administered by qualified staff and/or consultantsAdministered by qualified staff and/or consultants Uses available modern technologiesUses available modern technologies QA/QC is paramountQA/QC is paramount QA/QC is paramountQA/QC is paramount Reduces riskReduces risk Helps asset management & maintenance effortsHelps asset management & maintenance efforts Helps asset management & maintenance effortsHelps asset management & maintenance efforts Improves capital expenditure planningImproves capital expenditure planning
Condition Assessment Technologies & Condition Assessment Technologies & Management Techniques AvailableManagement Techniques AvailableManagement Techniques AvailableManagement Techniques Available
CCTV inspection CCTV inspection
Ad d Pi C diti A t S tAd d Pi C diti A t S t Advanced Pipe Condition Assessment Systems Advanced Pipe Condition Assessment Systems (Redzone, Cleanflow, PPR, etc.)(Redzone, Cleanflow, PPR, etc.)
P l CP l C Pole Cameras Pole Cameras
Manual and Entry Inspection MethodsManual and Entry Inspection Methods
Database systems for inspection information Database systems for inspection information storagestorage
GIS interfaces & stateGIS interfaces & state--ofof--thethe--art inspection softwareart inspection software
Consistent rating systems (NASSCO’s PACP &Consistent rating systems (NASSCO’s PACP & Consistent rating systems (NASSCO s PACP & Consistent rating systems (NASSCO s PACP & MACP)MACP)
Rehabilitation Technologies AvailableRehabilitation Technologies AvailablePipeline RehabilitationPipeline Rehabilitation::
CIPP LiningCIPP Lining CIPP Lining CIPP Lining UVUV--Cured CIPP LiningCured CIPP Lining SlipliningSliplining Fold & Form SlipliningFold & Form Sliplining Structural Epoxy liningStructural Epoxy lining SpiralSpiral--Wound & Panel liningWound & Panel lining SpiralSpiral--Wound & Panel liningWound & Panel lining Cementitious liningCementitious lining Trenchless Point Repair MethodsTrenchless Point Repair Methods
It’s critical to understand each It’s critical to understand each of the technologies; especiallyof the technologies; especiallyof the technologies; especially of the technologies; especially strengths & limitations.strengths & limitations.
Rehabilitation Technologies AvailableRehabilitation Technologies AvailableRehabilitation Technologies AvailableRehabilitation Technologies Available
Manhole RehabilitationManhole Rehabilitation::
Epoxy Coating/ LiningEpoxy Coating/ Lining PolyPoly--Urea Coating/ LiningUrea Coating/ Lining Urethane Coating LiningUrethane Coating Lining Calcium Aluminate MortarCalcium Aluminate Mortar
C d i Pl LiC d i Pl Li Cured in Place LinersCured in Place Liners Fiberglass InsertsFiberglass Inserts HDPE Manhole InsertsHDPE Manhole Inserts HDPE Manhole InsertsHDPE Manhole Inserts Cementitious LiningCementitious Lining Polymer MortarsPolymer Mortars Polymer MortarsPolymer Mortars
Metro Wastewater’s Interceptor & Manhole Metro Wastewater’s Interceptor & Manhole Condition Assessment & Rehab ProgramCondition Assessment & Rehab ProgramCondition Assessment & Rehab ProgramCondition Assessment & Rehab Program
Systematic, consistent, & costSystematic, consistent, & cost--effect effect h t i & h bilit tih t i & h bilit tiapproach to assessing & rehabilitating approach to assessing & rehabilitating
pipe and manhole conditionspipe and manhole conditions
InIn--house developed programhouse developed program
Collaborative effort betweenCollaborative effort between Collaborative effort between Collaborative effort between Engineering, Comprehensive Planning, Engineering, Comprehensive Planning, and Operations & Maintenance (O&M) and Operations & Maintenance (O&M) D t tD t tDepartments Departments
Balances operational, financial, and engineering Balances operational, financial, and engineering p g gp g gneedsneeds
Metro Wastewater’s Interceptor & Manhole Metro Wastewater’s Interceptor & Manhole C diti A t PC diti A t PCondition Assessment Program Condition Assessment Program
Pipes inspected mainly by using CCTVPipes inspected mainly by using CCTV Pipes inspected mainly by using CCTV Pipes inspected mainly by using CCTV InIn--house CCTV using MWRD crewshouse CCTV using MWRD crews 55--category pipe condition rating systemcategory pipe condition rating system 55 category pipe condition rating system category pipe condition rating system 33--category manhole condition rating systemcategory manhole condition rating system Manholes surface & entry inspected Manholes surface & entry inspected yy Utilizes advanced condition assessment Utilizes advanced condition assessment
technologiestechnologies
Program utilizes customized database system Program utilizes customized database system and GIS interfaceand GIS interface
Defined Departmental Roles & WorkflowDefined Departmental Roles & Workflow O&M DepartmentO&M Department –– Televise pipelines (CCTV), Televise pipelines (CCTV),
inspect manholes/ structures, enter inspection info inspect manholes/ structures, enter inspection info into database, initial condition ratinginto database, initial condition rating, g, g
Engineering DepartmentEngineering Department –– Review CCTV footage, Review CCTV footage, followfollow--up inspection of manholes, assign final up inspection of manholes, assign final condition rating generate prioritization list & reportscondition rating generate prioritization list & reportscondition rating, generate prioritization list & reports, condition rating, generate prioritization list & reports, design & manage rehabilitation project, research new design & manage rehabilitation project, research new technologiestechnologies
Comprehensive PlanningComprehensive Planning –– Review rehabilitation Review rehabilitation prioritization lists & reports, update & manage prioritization lists & reports, update & manage Capital Expenditure ScheduleCapital Expenditure Schedule
Interdepartmental Cooperation & Responsibility: Interdepartmental Cooperation & Responsibility: Results in successful inResults in successful in--house condition assessmenthouse condition assessmentResults in successful inResults in successful in house condition assessment house condition assessment and rehabilitation program.and rehabilitation program.
Program Components: CCTV InspectionProgram Components: CCTV Inspection CCTV video inspections: CCTV video inspections:
Minimum of 10% of pipe Minimum of 10% of pipe segments annuallysegments annuallysegments annuallysegments annually
10 year video cycle for entire 10 year video cycle for entire y yy yinterceptor system interceptor system
CCTV work performed inCCTV work performed in househouse CCTV work performed inCCTV work performed in--house house by O&M Department crewsby O&M Department crews
InIn--house CCTV ensures consistency, eliminates house CCTV ensures consistency, eliminates scheduling issues, & ultimately saves moneyscheduling issues, & ultimately saves money
Customized 5Customized 5--category rating system category rating system
Program Components: CCTV Review, Program Components: CCTV Review, C diti R ti Cl ifi ti & R tiC diti R ti Cl ifi ti & R tiCondition Rating Classification & ReportingCondition Rating Classification & Reporting
55--category CCTV review criteria developed incategory CCTV review criteria developed in--g y pg y phouse house
Rating criteria based on reinforced concrete pipe Rating criteria based on reinforced concrete pipe g p pg p p(RCP) conditions, but can be applied to all pipe (RCP) conditions, but can be applied to all pipe materialsmaterials
Rating system is comparable to NASSCO’s Rating system is comparable to NASSCO’s Pipeline Assessment & Certification Program Pipeline Assessment & Certification Program (PACP) but meets specific needs of MWRD(PACP) but meets specific needs of MWRD(PACP), but meets specific needs of MWRD(PACP), but meets specific needs of MWRD
Specific definitions of each category define Specific definitions of each category define rehabilitation urgency and time frame forrehabilitation urgency and time frame forrehabilitation urgency and time frame for rehabilitation urgency and time frame for rehabilitation completionrehabilitation completion
Program Components: CCTV Review, Program Components: CCTV Review, Condition Rating Classification & ReportingCondition Rating Classification & ReportingCondition Rating Classification & ReportingCondition Rating Classification & Reporting
GoodGood No rehab at this time maintain 10 yr cycleNo rehab at this time maintain 10 yr cycleGoodGood –– No rehab at this time, maintain 10 yr cycleNo rehab at this time, maintain 10 yr cycle
FairFair –– No rehab at this time, maintain 10 yr cycleNo rehab at this time, maintain 10 yr cycle
FairFair--Poor Poor –– Rehab may be necessary (5Rehab may be necessary (5--10 yrs)10 yrs)
PoorPoor –– Rehab is necessary (2Rehab is necessary (2--5 yrs)5 yrs)
Very PoorVery Poor –– Rehab needed ASAP (0Rehab needed ASAP (0--2 yrs)2 yrs)Very PoorVery Poor Rehab needed ASAP (0Rehab needed ASAP (0 2 yrs)2 yrs)
PipelinePipeline Rehabilitation report cost estimates based on Rehabilitation report cost estimates based on condition ratings of Faircondition ratings of Fair--Poor, Poor, and Very Poor Poor, Poor, and Very Poor only.only.
Program Components: Program Components: M h l / St t I tiM h l / St t I tiManhole/ Structure InspectionManhole/ Structure Inspection
Manhole surface & entry inspection examples:Manhole surface & entry inspection examples:Manhole surface & entry inspection examples:Manhole surface & entry inspection examples:
Program Components: Manhole/ Structure Program Components: Manhole/ Structure C diti R ti Cl ifi ti & R tiC diti R ti Cl ifi ti & R tiCondition Rating Classification & ReportingCondition Rating Classification & Reporting
GoodGood –– No rehab at this time, maintain 10No rehab at this time, maintain 10year inspection cycleyear inspection cycle
FairFair –– No rehab at this time, maintain 10 year No rehab at this time, maintain 10 year l it d dl it d dcycle, monitor as neededcycle, monitor as needed
PoorPoor –– Rehabilitation is necessary (1Rehabilitation is necessary (1--3 yrs)3 yrs)PoorPoor Rehabilitation is necessary (1Rehabilitation is necessary (1 3 yrs)3 yrs)
Program Components: GIS MappingProgram Components: GIS Mappingg p pp gg p pp g
Example GIS Map & Legend
Program Components: Interceptor Program Components: Interceptor f S ( S)f S ( S)Infrastructure System Database (IIS)Infrastructure System Database (IIS)
CCTV & Manhole inspection dataCCTV & Manhole inspection data CCTV & Manhole inspection data CCTV & Manhole inspection data maintained realmaintained real--time in IIS databasetime in IIS database
IIS database developed inIIS database developed in--househouse IIS database developed inIIS database developed in house house Oracle based systemOracle based system Manages inspection data physicalManages inspection data physical Manages inspection data, physical Manages inspection data, physical
pipe & manhole info, and GIS systempipe & manhole info, and GIS system Streamlined condition assessment programStreamlined condition assessment program Streamlined condition assessment program Streamlined condition assessment program Access searchable pipe & manhole/ structure Access searchable pipe & manhole/ structure
condition informationcondition informationcondition informationcondition information
Program Components: Program Components: S CS CSupplemental Pipe Coring ActivitiesSupplemental Pipe Coring Activities
Core drill sampling on selected pipe segmentsCore drill sampling on selected pipe segments Core drill sampling on selected pipe segmentsCore drill sampling on selected pipe segments Coring used to confirm remaining pipe thicknessCoring used to confirm remaining pipe thickness Candidates for coring are pipe segments that mayCandidates for coring are pipe segments that may Candidates for coring are pipe segments that may Candidates for coring are pipe segments that may
be rated in either category (i.e. fairbe rated in either category (i.e. fair--poor or poor)poor or poor) Coring work done by outside contractorCoring work done by outside contractor Coring work done by outside contractorCoring work done by outside contractor Info entered into IIS database, compare to Info entered into IIS database, compare to
existing data & reevaluate current condition ratingexisting data & reevaluate current condition ratinge st g data & ee a uate cu e t co d t o at ge st g data & ee a uate cu e t co d t o at g Samples used to verify & check CCTV rating Samples used to verify & check CCTV rating
systemsystemyy
Research & DevelopmentResearch & DevelopmentNew Condition Assessment TechnologiesNew Condition Assessment TechnologiesNew Condition Assessment TechnologiesNew Condition Assessment Technologies
Ongoing research of nonOngoing research of non--destructive methods to destructive methods to determine pipe condition & wall thicknessdetermine pipe condition & wall thicknessdetermine pipe condition & wall thicknessdetermine pipe condition & wall thickness
Laser profiling, sonar systems, & Laser profiling, sonar systems, & combo assessment technologies combo assessment technologies gg(RedZone, CleanFlow. PPR)(RedZone, CleanFlow. PPR)
Will replace supplemental coring Will replace supplemental coring Will help improve rehabilitation Will help improve rehabilitation
prioritizationprioritization
CCTV will still provide majority CCTV will still provide majority of inspection informationof inspection informationof inspection information of inspection information (CCTV ~90%, new method ~10%) (CCTV ~90%, new method ~10%)
Research & DevelopmentResearch & DevelopmentT ti & P d t E l tiT ti & P d t E l tiTesting & Product EvaluationTesting & Product Evaluation
MWRD’s 6MWRD’s 6--Step Manhole/ ConcreteStep Manhole/ Concrete MWRD s 6MWRD s 6 Step Manhole/ ConcreteStep Manhole/ ConcreteRehabilitation Product Evaluation ProgramRehabilitation Product Evaluation Program InIn--house developed programhouse developed program Evaluates products and applicatorsEvaluates products and applicators Helps ensure QA/QCHelps ensure QA/QC
Severe Wastewater Analysis Test (SWAT)Severe Wastewater Analysis Test (SWAT) Evaluates coating/lining effectiveness & longevity in Evaluates coating/lining effectiveness & longevity in g g g yg g g y
severe wastewater headspace environments severe wastewater headspace environments Laboratory and realLaboratory and real--life test comparisonslife test comparisons Accelerated test chamber & electrical impedance testsAccelerated test chamber & electrical impedance tests
LongLong--term Capital Expenditure Planningterm Capital Expenditure PlanningInterceptor PipesInterceptor Pipes Assumes pipes will be rehabilitated with CIPP lining for Assumes pipes will be rehabilitated with CIPP lining for
cost estimating purposescost estimating purposescost estimating purposescost estimating purposes
Other rehab methods considered during design (slip Other rehab methods considered during design (slip lining, fold & form, epoxylining, fold & form, epoxy--lined, etc.)lined, etc.)g, , p yg, , p y , ), )
Cost estimates based on past MWRD rehab projectsCost estimates based on past MWRD rehab projects
Historical CIPP cost data for pipe sizes 8”Historical CIPP cost data for pipe sizes 8”--60”60” Historical CIPP cost data for pipe sizes 8Historical CIPP cost data for pipe sizes 8 --6060
Current MWRD CIPP cost estimate data (installed price):Current MWRD CIPP cost estimate data (installed price):
8”8”-- 30” = $3.75 per in/ft30” = $3.75 per in/ft31” 31” –– 41” = $4.50 per in/ft41” = $4.50 per in/ft42”42” 60”+ = $6 00 per in/ft60”+ = $6 00 per in/ft42” 42” –– 60”+ = $6.00 per in/ft60”+ = $6.00 per in/ft
LongLong--term Capital Expenditure Planningterm Capital Expenditure PlanningManholes/ StructuresManholes/ Structures
Assumes manholes will be Assumes manholes will be b h bili d i hb h bili d i hbe rehabilitated with epoxy be rehabilitated with epoxy coating/lining for cost coating/lining for cost estimating purposesestimating purposesestimating purposesestimating purposes
Other rehab methods Other rehab methods considered during designconsidered during designconsidered during design considered during design (other coating/liner types, (other coating/liner types, CAM, fiberglass, HDPE)CAM, fiberglass, HDPE)
Cost estimates based onCost estimates based onpast MWRD rehab projectspast MWRD rehab projectsp p jp p j
Prioritization for Pipe & Manhole Prioritization for Pipe & Manhole Rehabilitation ProjectsRehabilitation ProjectsRehabilitation Projects Rehabilitation Projects
Pipe segments rated “very poor” will be repaired on priority Pipe segments rated “very poor” will be repaired on priority basis (i e next available rehab project)basis (i e next available rehab project)basis (i.e. next available rehab project)basis (i.e. next available rehab project)
Adjoining “poor” segments will be added when shared Adjoining “poor” segments will be added when shared bypass pumping cost savings can be realizedbypass pumping cost savings can be realizedbypass pumping cost savings can be realized bypass pumping cost savings can be realized
Assumed that only 75% of “poor” and “fairAssumed that only 75% of “poor” and “fair--poor” rated poor” rated pipes will ever reach “very poor” conditionpipes will ever reach “very poor” condition
Projected timing for when pipe segment or manhole will Projected timing for when pipe segment or manhole will deteriorate and reach “poor” or “very poor” is considereddeteriorate and reach “poor” or “very poor” is considered
Manholes rated as “poor” will be repaired on priority basis Manholes rated as “poor” will be repaired on priority basis (i.e. next available rehab project)(i.e. next available rehab project)
1010 C it l E dit S h d l d t dC it l E dit S h d l d t d 1010--year Capital Expenditure Schedule updated year Capital Expenditure Schedule updated accordinglyaccordingly
ConclusionsConclusionsA llA ll C di i A & R h bili iC di i A & R h bili i A wellA well--run Condition Assessment & Rehabilitation run Condition Assessment & Rehabilitation Program provides a systematic, consistent, & costProgram provides a systematic, consistent, & cost--effective approach to asset managementeffective approach to asset managementeffective approach to asset managementeffective approach to asset management
Supports long term capital expenditure planningSupports long term capital expenditure planning
Effective in forecasting future maintenance needs, Effective in forecasting future maintenance needs, prioritizing resource allocation, and costs based on prioritizing resource allocation, and costs based on p g ,p g ,inspection & condition assessment ratingsinspection & condition assessment ratings
Reduces potential overflows violations & failuresReduces potential overflows violations & failures Reduces potential overflows, violations & failuresReduces potential overflows, violations & failures
Utilizes trenchless technologyUtilizes trenchless technology
Can save a lot of money!Can save a lot of money!
QuestionsQuestions??
Jeff Maier, P.E.Jeff Maier, P.E.Metro Wastewater Reclamation DistrictMetro Wastewater Reclamation District
Denver ColoradoDenver ColoradoDenver, ColoradoDenver, Colorado303303--286286--32853285