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