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FAC Recommendation Update Medium Priority Assessments Roman Carter, Manager – Reliability Assurance October 3, 2012
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Background on Alert:
• A vegetation contact by a Transmission Owner identified actual field conditions that varied significantly from design assumptions – to the point where some facility ratings were considered inaccurate or in question.
• Follow-up resulted in the conclusion that this situation was not restricted to one entity or region.
• As a result, NERC issued an Alert Recommendation to proactively identify other such conditions and promote corrective actions.
FAC Recommendation Background
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FAC Alert Milestones: • October 7, 2010 – Original Alert issued
• October 28, 2010 and November 29, 2010 – Informational webinars
• November 30, 2010 – Revised Alert and Gerry Cauley Letter
• January 14, 2011 – Q&A document issued
• April 26, 2011 – Assessment Plan Review Criteria issued
• May 12, 2011 – Webinar: Discussed Assessment Plan Review Criteria and reporting by owners
• June 16, 2011 – Published webinar participant Q&A
FAC Recommendation Update
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FAC Alert Milestones: • July 15, 2011 – First “high” priority assessment due date
• September 22, 2011 webinar- results from July 2011 report
• January 15, 2012- Second assessment report on high priority transmission lines submitted by transmission owners.
• March 20, 2012- Update webinar provided to industry for the second “high priority” owner assessments performed.
• October 3, 2012 – First of two medium update webinars provided to Industry.
FAC Recommendation Milestones
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High Priority Assessment Responses:
• All High Priority Lines have been assessed
• Approximately 6,900 circuits were assessed
• Approximately 84,000 miles of line were assessed
• Approximately 10,000 discrepancies were discovered
• Approximately 52 percent have been mitigated as of July 17, 2012
Recap of High Priority Assessment
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FAC Recommendation Update
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
FRCC MRO NPCC RFC SERC SPP TRE WECC
14% 18%
32%
18%
60%
5% 8% 10%
Percent of Assessed Medium Circuits with Discrepancies Through July, 2012
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FAC Recommendation Update
37%
46%
52%
60% 60%
49%
67%
58%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
FRCC MRO NPCC RFC SERC SPP TRE WECC
Percent of Miles Assessed for Medium Priority Lines Through July 2012
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FAC Recommendation Update
Field Inspection 9%
Ground Survey 13%
LiDAR / PLS-CADD 58%
Combination of Methods
20%
Medium: Top Inspection Types
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FAC Recommendation Update
Combination of Remediation Types
56%
Removed Object or Graded
18%
Raised Transmission Structure
17%
Transmission Structure Installed
5%
Derated 4%
Medium: Top 5 Remediation Categories
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FAC Recommendation Update
Complete 38%
In Progress 52%
Not Started 10%
Medium: Remediation Status Breakdown
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FAC Recommendation Update
Clearance to Underbuild
19%
Conductor-Conductor Clearance
4%
Ground / Structure Clearance
72%
Combination of Listed Types
4% Transmission
Crossing 1%
Medium: Top 5 Discrepancy Categories
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Medium Assessment Summary
• 83 percent response rate in providing summaries of their first medium priority assessment.
• Approximately 28 percent of the total medium priority transmission circuits were assessed
• Completed assessments account for slightly more than 56 percent of the total of medium priority miles
• Nearly 5,700 discrepancies discovered
• Approximately 38 percent of the registered entities who have assessed their medium transmission facilities have completed their mitigation plans.
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Questions
Questions