Electric Infrastructure Workshop

1
Electric Infrastructure Workshop

• Gulf Power Company
• January 23, 2006

2
2004 2005 Hurricane SeasonWho We Are

• Our size
• Our location and geography
• Our company affiliation
• Our communication system

3
2004 2005 Hurricane SeasonWhat We Experienced

• Damage to our system
• Transmission
• Substation
• Distribution
• Hurricane TD Material Summary - slide 16

4
2004 2005 Hurricane SeasonWhat We Experienced

• Damage to our system by
• Wind
• Storm Surge
• Trees
• Debris
• Debris Removers
• Customers
• Coastal Damage slides 17 - 26
• Hurricane Ivan Maps slides 27 and 28

5
2004 2005 Hurricane SeasonWhat We Did

• Prior to Hurricane Season
• Review and refine the restoration process
• Critiques after each storm
• Updates of contact information
• Lessons learned from other utilities
• Communicate storm assignments to employees
• Prepare storm kits for each substation
• Ensure adequate material stocks can meet needs
• Negotiate and confirm contracts with vendors

6
2004 2005 Hurricane SeasonWhat We Did

• Approaching Storm
• Execute contracts
• Materials
• Food/Lodging/Staging/Transportation/Fuel
• Electrical and tree contractors
• Communicate with customers and local / state
  officials
• Conference call with Southeastern Electric
  Exchange members

7
2004 2005 Hurricane Season What We Did

• Post Storm
• Decentralize the restoration process
• Decision making ability is at the substation
  level
• Distribution assessments and restoration begin as
  soon as it is safe to report to work
• Draw upon Southern Company affiliates for
  assistance as needed
• Perform sweeps slide 29

8
2004 2005 Hurricane SeasonWhat Is In The Future

• Underground
• Help with vegetative management in right of way
• Evolving specifications
• Increased data from our mapping system
• Distribution Assessment Teams

9
2004 2005 Hurricane SeasonWhat Is In The Future

• Vegetation Management
• Pole Inspections
• maximize plant facility life
• gather information necessary to manage and
  prioritize needs and resources
• minimize unscheduled or emergency maintenance by
  performance of preventative maintenance
• NESC and Specifications

10
Vegetation Management

• Work performed by contractors
• Clearance at the time of pruning based on NESC
  requirements
• Program performance indicators
• Vegetation SAIDI
• Customer satisfaction - justified PSC complaints
  on tree trimming
• Public Safety number of documented accidents
  related to vegetation

11
Vegetation Management (cont.)

• Program utilizes a mix of maintenance pruning on
  entire circuits, targeted spot pruning on
  portions of circuits, and spot pruning in
  response to customer call ins.
• Annual work plans developed from Forestry
  Services field inspection data, outage data,
  customer call ins, and field engineering reports
• 100 of transmission field inspected each year
  all hazardous situations corrected (i.e., leaning
  or dead trees)

12
Distribution Line Inspections

• 249,802 wooden poles as of December 2005.
• 10 year inspection cycle for all distribution
  poles
• Gulf started its 2nd inspection cycle in 2003.
• All poles are inspected using one of the
  following inspection types
• Visual
• Sound and Bore
• Partial Excavation
• Full Excavation

13
Transmission Line Inspections

• 12 year inspection cycle for all transmission
  poles and structures
• Aerial patrol of system at least 4 times per year
• All structures are inspected every 6 years using
  one of the following inspection types
• Ground Inspection
• Wood Ground Line Treatment Inspection
• Steel Ground Line Treatment Inspection
• Comprehensive Walking Inspection
• Comprehensive Aerial Inspection
• Routine Aerial Patrol

14
National Electric Safety Code

• Purpose
• The NESC is composed of 8 sub-committees, an
  executive sub-committee, and an accredited
  standards committee
• Member Representation
• A new revision is published every 5 years.
• Recognized Authority

15
Appendix
16
Hurricane TD Material Summary
17
Navarre Underwater Cable Crossing
18
Storm Surge Damage on Underground Equipment and
Cable along Navarre Beach
19
Customer Crane Damage to Padmount Switchgear
20
Destroyed Underground Switching Cabinet
21
Underground Cables Exposed by Storm Surge
22
Road Destroyed on Barrier Island
23
Destruction to overhead lines, Pensacola Beach
24
Erosion around Padmount Switchgear
25
Customer Debris Hampers Restoration Efforts
26
Storm Surge Damage
27
Hurricane Ivan Wind
28
Hurricane Ivan Surge
29
Data Gathered by Sweeps

• Final Assessment Code Sheet includes
• Poles Down
• Primary Conductor Down, Floating or Low Clearance
• Secondary Conductor Down, Low Clearance, or
  Attached to Object
• Equipment Damaged
• Transformer, Capacitor, Recloser, Regulator, or
  Light
• Hardware Damaged or Missing
• Guy Wire Slack, Damaged or Broken
• Tree Trimming Needed
• Equipment Needing Pick Up
• Leaning Pole