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All Sections:
    2026 Planned Research Project 35.001 – Inspection and Assessment Project 35.002 – Conductor, Shield Wire, and Hardware Corrosion Project 35.003 – Structure and Foundation Corrosion Management P35.004 Traditional Conductors and Connectors P35.005: Ductile Iron and Composite Structures P35.006 Lightning Performance and Grounding P35.007: Line Design P35.008: Line Resiliency P35.010: Live Working: Research, Techniques and Procedures P35.011: Polymer and Composite Overhead Transmission Line Insulators P35.012: Porcelain and Glass Overhead Transmission Line Insulators P35.013: Overhead Line Ratings and Increased Power Flow P35.014: High Temperature Operation of Overhead Lines P35.015: Qualification, Selection and Maintenance of Advanced Conductors P35.018: Line Switch Management P35.019: HVDC Lines

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  • Overhead Transmission
    • Inspecting and Assessing Overhead Transmission Lines
      • Transmission Line Inspection and Assessment
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Assessing the BATCAM's Ability to Detect Corona
          • Field Guide: Visual Inspection of Porcelain and Glass Disc Insulators
            • Anatomy of Porcelain and Glass Disc Insulators
            • Definition of Dimensions
            • Maintenance Priority Rating
            • Porcelain Disc Insulators
            • Glass Disc Insulators
          • Selecting Effective Inspection and Assessment Methods and Technologies
          • Yellow Book - Reference Guide
            • Volume 1 - Asset Management
              • Framework for Inspection
              • Inspection and Assessment Program: Establishing and Refining
              • Inspection and Assessment: Methods and Technologies
              • Forensic Analysis of Failures
              • Standardized Nomenclature and Component Condition Rating
            • Volume 2 - Component-Specific Inspection
              • Wood Transmission Structures
              • Steel Transmission Structures
              • Steel Structure Foundations
              • Concrete Foundations
              • Composite Poles
              • Obstruction Marking and Lighting
              • Conductors
              • Compression Connectors
              • Grounding
              • Fiber-Optic Cables
              • Polymer Insulators
              • Porcelain Suspension Insulators
              • Glass Suspension Insulators
              • Connection Hardware on Transmission Structures
              • Component Guide: Animal Deterrents
              • Overhead Transmission Line Air Break Switches
              • Transmission Line Surge Arresters
            • Volume 3 - Application of Methods/Technologies
              • Vegetation
              • Bird Interactions with Transmission Lines
              • Structural Corrosion: Inspection and Assessment Practices
              • Infrared Inspection
              • Daytime Discharge Inspection
              • Using Unmanned Aircraft Systems
              • Satellite Inspection Technology for Transmission Lines
              • Processing Inspection Imagery
              • Selecting Effective Inspection
          • Transmission Inspection Practices and Information Management
      • Connector Management
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Overview of Causes of Compression Connector Failure
          • Visual Inspection
          • Dimensioning of Compression Connectors
          • Infrared Thermography of Compression Connectors
          • Radiography of Compression Connectors
          • Resistance Measurement of Connectors
          • Connectors 101 Training
    • Transmission Line Corrosion
      • Conductor, Shield Wire and Hardware Corrosion Management
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Corrosion Calculator
          • Atmospheric Corrosion Mapping
          • Condition Assessment Comparison of Two Coastal Aluminum Conductors
          • AAAC Flint Forensic Report
          • Geometry Factor Development
          • Condition Assessment Comparison of Two Coastal Aluminum Conductors
          • Corrosion Monitoring System
          • Corrosion Failure of a Conductor Located Near an Industrial Site
          • Forensic Analysis of Hardware due to Corrosion Damage
      • Structure and Subgrade Corrosion Management
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • EPRI Approach to Corrosion Monitoring
          • Innovative Cathodic Protection Application for Transmission Tower Concrete Foundations
          • Selection and Application of Coatings
          • Cathodic Protection and the Effects of Stray Current
          • Coating System Selection and Application: Case Study Update
          • Corrosion Monitoring System
          • Steel Pole Inspection
          • Subgrade Corrosion Map Update
    • Lightning Performance and Grounding of Transmission Lines
      • Project Overview
      • Updates & Events
      • Research & Technical Content
        • Lightning Performance and Targets
        • Mechanical Aging of Surge Arrester Leads
        • Alternative Grounding Materials for Counterpoises
        • Drawing Measurement Tool
        • Lightning Impulse Strength Calculation
        • US Ground Flash Density Map
        • US Soil Resistivity Map
        • Structure Surge Impedance Calculator
        • Surge Arresters Database
    • Transmission Line Design
      • Ductile Iron & Composite Structure Management (P35.005)
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Effect of Temperature on Strength of Composite Poles: Comparison of Performance to Crossarms
          • Design Methodology for Composite Poles as Anti-Cascading Structures: 2023 Update – Longitudinal Cascading
          • Cantilever Tests on Ductile Iron Poles
          • McWane Poles ductile iron facility visit
          • RS Poles GFRP composite facility visit
          • Evaluation of Wildfire Protection Methods for Composite Utility Structure Materials
          • Recommendations for Grounding of Composite Utility Poles
          • Unaged Pole Break
      • Line Design Tools and Practices for Construction & Maintenance
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Mitigating Vortex Induced Vibration on Steel Pole Davit Arms
          • Optimal Line Tension and Conductor Strength (Op10)
          • Transmission Pole Material Selection Guide: 2025 Update – Representative Designs
          • Vibratory Caisson Foundation Pull Test
          • Vibratory Caisson Foundation Test - Marengo, IA
          • EPRI Software Demo: Op10 Version 2.0 – Optimal Line Tension Calculator
      • Enhancing Transmission Line Resiliency
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Dynamic Impact Test Line Update Video
          • Impact of Geotechnical Investigation Frequency on Design Reliability
          • Learning From Failure – Case Studies in Improved Engineering
          • Longitudinal Security Loading: Broken Conductors and Longitudinal Cascades
    • Live Working
      • Project Overview
      • Updates & Events
      • Research & Technical Content
        • Live Working Rope – Compilation of Electrical Testing Results
        • Live Working Rope Testing and Specifications
        • ESRI Survey123 Tracking Form Testing and Field Inspection Form for Insulating Tools
        • Selected Standards and Regulations
        • Minimum Approach Distance – IEEE Calculation Procedures
    • Transmission Line Insulators
      • Polymer and Composite Overhead Transmission Line Insulators
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Categorization of Hydrophobicity
          • Insulator Corona Cage Test
      • Glass and Porcelain Transmission Line Insulators
        • Project Overview
        • Updates & Events
        • Research and Technical Content
          • Insulator Population Assessment
          • Mechanical Failing Tensile Load Assessment
          • Overview and Terminology of Porcelain and Glass Insulators
          • Key Processes of the Contamination Flashover Process
          • A Study of How Glass Insulators Break
          • The Combined Mechanical and Electrical (M&E) Strength Test
    • Increased Overhead Transmission Capacity
      • Overhead Line Ratings and Increased Power Flow
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Capacity Gains from Thermal Uprating
          • Comparing IEEE and Ratings Research Recommendations for LiDAR
          • Conductor Emissivity Testing
          • Conductor Resistance Conversion Calculator
          • Platinum Book Calculator: Conductor Selection & Cost of Losses
          • Ratings Information Session, FERC 881 Update and WindSim DLR Field Trial
          • Variation in AAR based on daily Air Temperatures
          • Weather Based DLR Field Trials at BPA
          • Ambient Adjusted Ratings
          • Solar Heating
          • Answers to Several Frequently Asked Questions on DLR
          • Platinum Book Calculator – Breakers (Gas Filled)
          • Sunrise-sunset Calculator for Day-night Ratings
          • Sunrise-sunset Calculator for Day-night Ratings
          • Commonly Used Terms and Abbreviations
          • DLR Life Cycle Cost Estimator
          • DLR using a PMU and Topolonet
          • LiDAR collection for uprating – planning tool
          • Solar Flux Calculator
          • Switch Ratings
          • Wave Trap Ratings
      • High Temperature Operation of Overhead Lines
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • High Temperature Operation of Polymer Insulators
          • Effect of High Temperature on Tensile Strength of Aluminum 1350-H19
          • High Temperature Operations Standards
      • Advanced Conductors
        • Project Overview
        • Updates & Events
        • Research & Technical Content
          • Research Result Summaries
            • Carbon Core Qualification
    • Transmission Line Switch Management
      • Project Overview
      • Updates & Events
      • Research & Technical Content
        • ESRI Survey123 Inspection Form for Commissioning of New Line Switches
        • Quick Break Whip Device Testing
        • Selected Standards
        • Line Switch Commissioning 101
        • Line Switch Quick Break Whip: Test Parameters and Restrike Calculator
    • Contacts
    • Supplemental Projects

2026 Planned Research

The research team is happy to share our plans for this year’s R&D. Thanks to all of our utility advisors that have given input throughout the planning process. We are excited to continue working together!

P35.002: Conductor, Shield Wire, and Hardware Corrosion
P35.003: Structure and Sub-Grade Corrosion

P35.005: Ductile Iron and Composite Structures
P35.006: Lightning Performance and Grounding
P35.007: Line Design
P35.008: Line Resiliency
P35.010: Live Working
P35.011: Polymer and Composite Insulators
P35.012: Porcelain and Glass Insulators
P35.013: Line Ratings and Increased Power Flow
P35.014: High Temperature Operations
P35.015: Advanced Conductors and Connectors
P35.018: Line Switches
P35.019: HVDC Lines

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