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Identifying Critical Sewer Lines

April 10, 2002. Jon Kreischer. CVEN 689 - GIS. Project Definition. Identify Critical Sewer Lines in College StationNecessary Step by Utilities Mngr$3 million budget$1.9M Treatment$1.1M CollectionResearch CS Preventative Maintenance Capabilities

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Identifying Critical Sewer Lines

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    1. April 10, 2002 Jon Kreischer CVEN 689 - GIS Identifying Critical Sewer Lines

    2. April 10, 2002 Jon Kreischer CVEN 689 - GIS Project Definition Identify Critical Sewer Lines in College Station Necessary Step by Utilities Mngr $3 million budget $1.9M Treatment $1.1M Collection Research CS Preventative Maintenance Capabilities & Strategies

    3. April 10, 2002 Jon Kreischer CVEN 689 - GIS Sewer Maintenance Historical Perspective Reactionary vs. Proactive Strategies Cost Effectiveness Material Type Life Cycle Costs College Station $3M Sanitation Budget, $1.1M for O&M of sewer collection system Ductile Iron Pipes – Concrete Piping - PVCDuctile Iron Pipes – Concrete Piping - PVC

    4. April 10, 2002 Jon Kreischer CVEN 689 - GIS Preventative Maintenance Types of Preventative Maintenance Mechanical Sealing External Grouting Root Removal Cleaning: Jet Rodding Biological Agents: De-Greaser Bugs College Station’s Tools Jet Rodding, Bugs, TV equipment

    5. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Categories of Sewers Category A High Impact System on surrounding environment Post-failure Rehab is twice as expensive as planned replacement/four times cost of scheduled rehab Require preventative maintenance Category B Less critical than A because of reduced failure cost and effect. Preventative action is still cost effective Category C Non-critical Sewers Preemptive Work in these sewers would not be cost effective Existing Sewer Evaluation & Rehabilitation by Water Environment Federation ( numerous Authors)Existing Sewer Evaluation & Rehabilitation by Water Environment Federation ( numerous Authors)

    6. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Sewer Characteristics Old Age Deeper than average Clay pipes Located under busy streets Difficult access Located in Poor Soil Conditions Difficult to bypass Require Frequent Inspection or maintenance Near sensitive environmental area

    7. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Sewer Lines in College Stations Large Lines – 13” or greater Busy Street – Texas Ave Require Frequent Maintenance Vitrified Clay Pipe Tree roots and grease

    8. April 10, 2002 Jon Kreischer CVEN 689 - GIS Original Sewer Lines Theme

    9. April 10, 2002 Jon Kreischer CVEN 689 - GIS Sewer Line Attribute Table

    10. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Sewer Lines - 1

    11. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Sewers Lines - 2

    12. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Sewer Lines - 2

    13. April 10, 2002 Jon Kreischer CVEN 689 - GIS Critical Lines - 3

    14. April 10, 2002 Jon Kreischer CVEN 689 - GIS The Project Continues Working with Manholes Manhole Point Theme Network Analysis Conclusions

    15. April 10, 2002 Jon Kreischer CVEN 689 - GIS Sanitation Work Force Preventative Maintenance Locating the Manholes

    16. April 10, 2002 Jon Kreischer CVEN 689 - GIS Any Questions

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