Updates & Events
Info for members about events, updates, and results
2026 Engagement Opportunities
| Event Name | Date | Location | Contact | Information |
|---|---|---|---|---|
| Transmission and Substations Task Force Meeting | February 9 - 12 | Charlotte, NC EPRI Offices | Rachel Moore | Meeting Information |
| Orange Book Training Course: Ch 3 - Fatigue of Overhead Conductors (35.007) | March 25 1:30-3:00 pm ET | Webcast | David Folk Pierre Marais |
Meeting Information |
| Transmission & Substations Advisory Meeting | March 30 - April 1 | Charlotte, NC EPRI Offices | Rachel Moore | Meeting Information |
| Information Exchange Session: Identification and Resolution of Post-Construction Clearance Violations (P35.007) | April 16 10:00- 11:30 am ET | Webcast | David Folk Pierre Marais |
More information coming soon |
| Lattice Tower Design Course (P35.007) | May 12 (TIME) | Charlotte, NC | David Folk Pierre Marais |
Meeting Information |
| EPRI R&D Project Update Webcast: Composite Structures, Line Design, Increasing Line Resiliency (P35.005, P35.007, P35.008) | June 3 2:00-3:00 pm ET | Webcast | David Folk Pierre Marais |
More information coming soon |
| Overhead Transmission 2025 ARP Rollout #1 | June 18 10:00 - 11:30 am ET | Webcast | Rachel Moore | More information coming soon |
| Overhead Transmission 2025 ARP Rollout #2 | July 30 10:00 - 11:30 am ET | Webcast | Rachel Moore | More information coming soon |
| Transmission and Substations Task Force Meeting | August 10-14 | Charlotte, NC EPRI Offices | Rachel Moore | More information coming soon |
| Transmission & Substations Advisory Meeting | August 31- September 2 | Rachel Moore | More information coming soon | |
| EPRI R&D Project Update Webcast: Composite Structures, Line Design, Increasing Line Resiliency (P35.005, P35.007, P35.008) | November 18 2:00-3:00 pm ET | Webcast | David Folk Pierre Marais |
More information coming soon |
2026 Anticipated Deliverables
| Product Name | Deliverable type |
|---|---|
| EPRI AC Transmission Line Reference Book - 200 kV and Above (The Red Book) | Technical Update |
| EPRI Red Book Application Suite | Software |
| EPRI Transmission Line Reference Book: Conductor and Structure Motion (The Orange Book) | Technical Update |
| EPRI Transmission Line Reference Book: 115– 400 kV Compact Line Design (The Blue Book) | Technical Update |
| Quantifying the Real Cost of Pole Material Options : 2026 Edition | Technical Update |
| Best Practices for LiDAR data in Overhead Line Design Software | Technical Update |
| Safe Design Tension of ACSS Conductor: 2026 Edition | Technical Update |
| Orange Book Seminar 2 - Fatigue of Overhead Line Conductors | Training Workshop |
| Training Workshop : Lattice Design | Training Workshop |
| NESC Clearances Calculator V1.0 (Beta) | Pre-Software |
| NESC Clearances Calculator V1.0 (Production) | Software |
| Optimal Line Tension Calculator Op10 v2.7 (Beta) | Pre-Software |
| Optimal Line Tension Calculator Op10 v2.7 (Beta) | Software |
| Transmission Line Workstation Gen 2: Design Modules Vibration (TLW-Gen2) v14.0 (Beta) | Pre-Software |
| Transmission Line Workstation Gen 2: Design Modules Vibration (TLW-Gen2) v14.0 | Software |
2025 Engagement Opportunities
| Meeting | Date | Location | Information |
|---|---|---|---|
| Overhead Line Design Task Force | March 10-13 (In-person) March 17-20 (Virtual) |
Charlotte, NC | Meeting Materials |
| EPRI Overhead Transmission Program (P35) New Supplemental Launch Webcast | April 3 2:00 pm - 3:00 pm ET |
Webcast | Meeting Materials |
| Online Training for Orange Book | April 24 2:00-3:30 pm ET |
Webcast | Meeting Materials |
| EPRI R&D Project Update Webcast: Composite Structures, Line Design, Increasing Line Resiliency (P35.005, P35.007, P35.008) | May 29 2:00 - 3:00 pm ET |
Webcast | Meeting Materials |
| Training: Calculation of Overhead Line Loads- Session 1 | June 4 2:00-3:00 pm ET |
Webcast | Meeting Materials |
| Training: Calculation of Overhead Line Loads- Session 2 | July 9 2:00-3:00 pm ET |
Webcast | Meeting Materials |
| Overhead Transmission 2026 ARP Rollout #1 | July 17 10:00 am - 11:00 pm ET |
Webcast | Meeting Material |
| Overhead Transmission 2026 ARP Rollout #2 | July 24 2:00 pm - 3:30 pm ET |
Webcast | Meeting Material |
| Overhead Line Design Task Force | August 18-22 (In-person) August 25-29 (Virtual) |
Charlotte, NC | Meeting Materials |
| Red Book Training | September 29-October 2 8:00-4:30 pm ET |
Charlotte, NC | jcardoso@epir.com |
| EPRI End of Year Webcast: Composite Structures, Line Design, Increasing Line Resiliency (P35.005, P35.007, P35.008) | November 13 2:00-3:00 pm ET |
Webcast | Meeting Materials |
2025 Deliverables
In 2025, a mix of ongoing research initiatives together with new research areas will be undertaken.
| Product ID# | Deliverable | Type | Date |
|---|---|---|---|
| 3002032759 | EPRI AC Transmission Line Reference Book: 200 kV and Above: 2025 Edition | Reference Book | December 2025 |
| 3002033679 | Red Book Application Suite v2.5.1 | Software | December 2025 |
| 3002033832 | Red Book Web Apps | Software | December 2025 |
| 3002032758 | EPRI Transmission Line Reference Book: Conductor and Structure Motion: 2025 Edition | Technical Update | December 2025 |
| 3002032762 | EPRI Transmission Line Reference Book: Compact Line Design (Blue Book)-2025 Edition | Technical Update | December 2025 |
| 3002032743 | Transmission Pole Material Selection Guide : 2025 Edition | Technical Update | December 2025 |
| 3002032764 | OHL Line Design guide - Considerations for Extra - High Voltage Design | Technical Update | December 2025 |
| 3002032765 | Safe Design Tension of ACSS Conductor: 2025 Edition | Technical Update | December 2025 |
| 3002032052 | Orange Book Seminar 1 - Orange Book Overview & Single Conductor Aeolian Vibration | Technical Update | December 2025 |
| 3002032581 | Training Workshop : Calculation of Overhead Line Loads- Session 1 | Workshop | December 2025 |
| 3002033219 | Training Workshop : Calculation of Overhead Line Loads- Session 2 | Workshop | December 2025 |
| 3002033829 | Transmission Line Workstation Gen 2: Design Modules Vibration (TLW-Gen2) v13.0 | Software | December 2025 |
| 3002033298 | Optimal Line Tension Calculator Op10 v2.6 | Software | December 2025 |