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Geotrack_Presentation

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Geotrack_Presentation

  1. 1. byby Jonathan L. TanJonathan L. Tan Geotrack, Inc.Geotrack, Inc. Benefits of Subsurface Utility Engineering
  2. 2. SUE - The professional service that will comprehensively and effectively locate subsurface utilities and upgrade the quality of underground utility maps for the benefit of any infrastructure- related activity, including engineering, construction and maintenance. What is Subsurface Utility Engineering?
  3. 3. Why Use Subsurface Utility Engineering? Sources of Utility Information: Engineers in the past and currently typically use one or more of the following sources to compile a utility composite that overlays the new design:  Old Project plans (As-Designed)  Old Project plans (Red-Lined)  Utility records (As-Designed)  Utility records (As-Built)  Maintenance Records  Repair records  Visual observation  Field study
  4. 4.  Utility Damage affecting the Safety of Construction Crew or General Public  Redesign Costs  Higher Construction Bids  Change Orders  Extra Work Orders Risks of Proceeding with Unreliable Inaccurate and Incomplete Utility Data  Construction Claims  Higher Insurance Costs  Higher Financing Costs  Project Delays  Detours  Bad Publicity  Money and Time Loss Intangibles (Legal Fees, Commerce Loss, etc.) SUE, properly applied, will often eliminate financial, legal and catastrophic risks associated with utility conflicts on engineering/construction projects.
  5. 5. Subsurface Utility Engineering (S.U.E.)  Utilities Records Research;  Relocation Cost Estimates;  Utility Design / Relocation Design;  Plotting of Utilities from Records. SUE Combines traditional Engineering practices, such as: With State-of-the-Art Technologies and Processes  Electromagnetic, sonic, vibratory, radio detection technologies;  Air or water with non-destructive vacuum excavation;  CADD, Geographic Information Systems, Global Positioning Systems;  Geotrack’s SUE Quality Control Plan. Recently published ASCE Guidelines suggest that SUE is integral to the standards of care and best practices
  6. 6. Subsurface Utility Engineering is Comprised of Three Key Processes 1. Designating: modern line tracing techniques to detect horizontal position of subsurface facilities 2. Locating: non-destructive air (or water) vacuum excavation to precisely and safely expose subsurface facilities 3. Data Management: state-of-the-art survey, mapping and data management processes and technologies
  7. 7. What is the Standard of Care for Utility Data? American Society of Civil Engineers Standard CI/ASCE 38-02 STANDARD GUIDELINE FOR THE COLLECTION AND DEPICTION OF EXISTING SUBSURFACE UTILITY DATA  A consensus standard that defines the quality of utility location and the attribute information that is ultimately placed on engineering or construction plans;  It presents a system of classifying the quality of data associated with subsurface utilities that will allow the owner, engineer and constructor to reduce risk associated with less reliable utility data;  CI/ASCE 38-02 is designed to be used either as a reference or part of a specification for a project involving existing underground utilities;  The Guideline refers to several methods of data acquisition relevant to the four Quality Levels, including electromagnetic, ground penetrating radar and non-destructive vacuum excavation methods;  It addresses the appropriate utility/utility data depiction methodologies, including legends, line coding, labeling, and notes.
  8. 8. Utility Data Quality Levels  SUE providers uniformly use four Quality Level categories to convey to designers the accuracy of the subsurface utility information provided.  Quality Level D (Historical Utilities Records Research)  Quality Level C (Site Assessment)  Quality Level B (Designating)  Quality Level A (Locating - Non-Destructive Air- Vacuum Excavation)  Note: Quality levels attached to the plotted utility in plans.  Geotrack’s professional engineers and/or surveyors certify each set of updated utility plans and test hole forms
  9. 9. Quality Level D (Existing Records)  Least reliable level of data quality  Data is plotted on plans solely from records, occasional field visuals, or verbal recollections  Appropriate for:  Project planning phase  Route selection  Utility inventories, and  Very early utility relocation cost estimates
  10. 10. Quality Level C (Surface Features Survey)  Visible utility valves, manholes, hand holes, hydrants, pedestals, transformers, etc. are surveyed and plotted on a current base mapping along with other existing site information. (Boundary, R/W, Topography, etc.)  Utility data from records is correlated to those surface features. However, problems with record interpretation still exist. For example, no schematics or appurtenances are depicted, buried utilities may or may not not necessarily lie in a straight line between appurtenances, may have been altered for upgrades or repair, or in fact no records exist at all. More and more common due to deregulation that utility owners will not share records with anyone, even with government agencies. Its application should be confined to rural projects where utilities are not prevalent
  11. 11. Quality Level B (Designating) The Key to getting the best data is Designating This is a significant upgrade in quality level over C & D  Surface geophysical methods used to search for and trace existing utilities (“Designating”)  Designated utilities are then surveyed and plotted into base mapping.  Non-recorded utilities are found  Utility routes between appurtenances are imaged  Typically used in early preliminary design and construction footprint design  This information is usually sufficient to accomplish preliminary engineering goals, and result in substantial cost savings by eliminating utility relocations.
  12. 12. Utility Designating (Level “B”)  Use of geophysical prospecting techniques, such as electromagnetics and sonics, to confirm the existence and approximate horizontal location of underground utilities.  This is where SUE begins. Designating is vital to detecting undocumented lines and determining where and how many test holes are needed.
  13. 13. Designating (Level B) at Newark Liberty International Airport
  14. 14. Quality Level A (Locating/Test Holes) Highest Quality Available – Most accurate and comprehensive Data  Utilities found via non-destructive air vacuum means digging at critical points to determine the precise horizontal and vertical position of underground utilities  Precise horizontal locations and elevations/depths are surveyed and plotted  Materials, sizes and conditions are documented  Used in final design stage  Allows for small adjustments in design for big savings in construction
  15. 15. Utility Locating  Vertical location of utilities utilizing air-(or water) vacuum excavation equipment  Non-destructive vacuum excavation systems expose and locate utilities precisely and safely. This Produces the Highest Quality Level of data, Level “A”
  16. 16. Vacuum Excavation Truck (Quality Level A) in DC
  17. 17. Data Management  With traditional or GPS Survey methods utilizing Computer Aided Drafting and Design programs and/or Geographic Information Systems (GIS) to translate the exact utility data into a computer-generated three- dimensional form.  Produces a clear and exact visual representation of the position of existing underground utilities in any area where excavation will occur. GEOTRACK,INC. Client: Contract# Project# Name: City: County: State: GeotrackJob# Truck# CrewChief DrawnBy Date CheckedBy SKETCHPLAN: *NOT TOSCALE * HORIZONTALSURVEY ACCURACY =+/-0.15mm SYMBOLLEGEND -TESTHOLEHUB/PK -UTILITY POLE -FIREHYDRANT -WATER VALVE -GAS VALVE -STORMMANHOLE -SANITARY MANHOLE -ELECTRICMANHOLE -CATCHBASIN -ELECTRIC TRANSFORMER -CABLETELEVISION PEDESTAL -TELEPHONE PEDESTAL -DIAMETER/ SPECIES -SURVEYTRAVERSE POINT S T T C E E D ABBREVIATIONS: - Baseline - Benchmark - Catch Basin - Centerline - Curb& Gutter - Cast Iron - Corrugated MetalPipe - Concrete - Conduit - DuctileIron - Driveway - Electric - Elevation - Edge ofPavement - FireHydrant - Gas Valve - High Pressure Plastic - Light Pole - Polyvinyl Chloride - Reinforced ConcretePipe - Right-of-Way - SanitarySewer - StormSewer Grate - StormSewer - Sidewalk -Steel - TestHole - TerraCotta - Transformer - SurveyTraverse Point - UtilityPole - WaterLine B.M. CB CG CI CMP CONC COND DI DW ELEC ELEV EP FH GV HPP LP PVC RCP R/W SAN SG STM SW STL TH TC TRAN TRAV UP W/L BL CL CERTIFICATION: Iherebycertifythattheinformationshown hereoniscorrecttothebestof myknowledge andbelief. -STORMGRATE -INLET 1.00 181.1 443 (BOTTOM-TOP) OUTSIDEDIAMETERS MEASUREMENTSTO FLAGGINGCOLOR VERTICALSURVEYACCURACY=+/-0.15mm STRUCTURE BOTTOMOFUTILITY/ - STRUCTURE TOPOFUTILITY/ MEASUREMENT DEPTHFROM MANUAL (HUBEL-TOP)= BOTTOMOFUTILITY/STRUCTURE TOPOFUTILITY/STRUCTURE 1.00 181.1 443 SURFACEREFERENCEPOINT*NOTTOSCALE* (281)420-9491 (281)422-0941 SH121 THECOLONY DENTON TEXAS 60000 413,123 C.SELLARS C.DOSKOCIL 2/11/01 ORANGE 4.88' 593.98' 312BobSmithRd.,SteA Baytown,Texas 77529 G.HANS -5.01 ft. 589.10' 588.97' N SH121WB EP UP UP 3"EDGETOEDGE 11/2" O.D. PVC 11/2" O.D. PVC LINENo.: T9 W18 W18 E18 E18 E18 E18 T14 T1 T1 T1 T41 T41 T15 T15 T15 T15 T15 T9 T9 T9 T9 T9 T31 T31 T31 T31 T31 WW E17 E17 E17 CATV1 CATV1 E19 E19 T1 T1 CATV2 CATV2 TH#20A TELEF.O. X=2466227.30 Y=7078028.20 BenchMark:Name/No. Elev.= TESTHOLEPROFILELOOKINGSOUTHEAST P.K.NAIL/HUBSTAKE/CHISLEDX UtilityLocationReportforTestHole20Aof29inU.S.SurveyFeet. Pavement:N/Ain.AsphaltN/Ain.Concrete N/Ain.Other: N/A Soil:TypeCLAY Conditions:DAMP Utility:TELEF.O.Size: (2)11/2"Material:PVC Cond:GOOD Wasitfound?YESAttherequestedlocation?YES BenchMark:Name/No. 121-50 Elev.=593.04' Asshownonsheet2of12ontheplans dated1/9/01andcalledSH121UTILITYLOCATIONS 23.5' ELEV.= ATTHE ELEV.= ATTHE ELEV.= ATTHE -TELEMANHOLE PLANOPKWY. 88.9' 43.6'
  18. 18. GEOTRACK,INC. Client: Contract# Project# Name: City: County: State: GeotrackJob# Truck# CrewChief DrawnBy Date CheckedBy SKETCHPLAN: * NOT TO SCALE * HORIZONTAL SURVEY ACCURACY =+/-0.15mm SYMBOLLEGEND -TEST HOLEHUB/PK -UTILITY POLE -FIRE HYDRANT -WATER VALVE -GAS VALVE -STORM MANHOLE -SANITARYMANHOLE -ELECTRICMANHOLE -CATCH BASIN -ELECTRIC TRANSFORMER -CABLE TELEVISION PEDESTAL -TELEPHONE PEDESTAL -DIAMETER/ SPECIES -SURVEYTRAVERSE POINT S T T C E E D ABBREVIATIONS: - Baseline - Benchmark - Catch Basin - Centerline - Curb &Gutter - Cast Iron - Corrugated Metal Pipe - Concrete - Conduit - Ductile Iron - Driveway - Electric - Elevation - Edge of Pavement - Fire Hydrant - Gas Valve - High Pressure Plastic - Light Pole - Polyvinyl Chloride - Reinforced Concrete Pipe - Right-of-Way - Sanitary Sewer - StormSewer Grate - StormSewer - Sidewalk - Steel - Test Hole - Terra Cotta - Transformer - Survey Traverse Point - UtilityPole - Water Line B.M. CB CG CI CMP CONC COND DI DW ELEC ELEV EP FH GV HPP LP PVC RCP R/W SAN SG STM SW STL TH TC TRAN TRAV UP W/L BL CL CERTIFICATION: I herebycertifythat the information shown hereon iscorrect tothe best of myknowledge and belief. -STORM GRATE - INLET 1 .001 81.14 43 (BOTTOM-TOP) OUTSIDEDIAMETERS MEASUREMENTSTO FLAGGINGCOLOR VERTICALSURVEYACCURACY=+/-0.15mm STRUCTURE BOTTOMOF UTILITY/ - STRUCTURE TOPOFUTILITY/ MEASUREMENT DEPTH FROMMANUAL (HUBEL-TOP)= BOTTOMOFUTILITY/STRUCTURE TOPOFUTILITY/STRUCTURE 1 .001 81.14 43 SURFACEREFERENCEPOINT*NOTTOSCALE* (281)420-9491 (281)422-0941 SH121 THECOLONY DENTON TEXAS 60000 413,123 C.SELLARS C.DOSKOCIL 2/11/01 ORANGE 4.88' 593.98' 312BobSmithRd.,SteA Baytown,Texas 77529 G.HANS -5.01 ft. 589.10' 588.97' N SH121WB EP UP UP 3"EDGETOEDGE 11/2" O.D. PVC 11/2" O.D. PVC LINENo.: T9 W18 W18 E18 E18 E18 E18 T14 T1 T1 T1 T41 T41 T15 T15 T15 T15 T15 T9 T9 T9 T9 T9 T31 T31 T31 T31 T31 WW E17 E17 E17 CATV1 CATV1 E19 E19 T1 T1 CATV2 CATV2 TH#20A TELEF.O. X=2466227.30 Y=7078028.20 BenchMark:Name/No. Elev.= TESTHOLEPROFILELOOKINGSOUTHEAST P.K.NAIL/HUBSTAKE/CHISLEDX UtilityLocationReportforTestHole20Aof29inU.S.SurveyFeet. Pavement:N/Ain.AsphaltN/Ain.Concrete N/Ain.Other: N/A Soil:TypeCLAY Conditions:DAMP Utility:TELEF.O.Size: (2)11/2"Material:PVC Cond:GOOD Wasitfound?YESAttherequestedlocation?YES BenchMark:Name/No. 121-50 Elev.=593.04' Asshownonsheet2of12ontheplans dated1/9/01andcalledSH121UTILITYLOCATIONS 23.5' ELEV.= ATTHE ELEV.= ATTHE ELEV.= ATTHE -TELE MANHOLE PLANOPKWY. 88.9' 43.6' Sample Geotrack Test Hole Form Quality Level A P.E. or P.L.S. Certification
  19. 19. Benefits of Professional SUE and Mapping Services: • Save You and Your Clients Money FHWA reports savings average of $4.62 per dollar spent on SUE. Other State DOT’s have found up to $40 saved per $1 spent - DOT’s have found that their projects are completed on time and under budget with SUE. • Save Time With SUE, large and small projects finish without delay claims, multiple change orders, and utility service disruptions • Get lower contractor bids More accurate and complete information will reduce “contingencies” in proposals
  20. 20.  Save time, money, and manage your projects more effectively with Geotrack’s SUE Services

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