FPSC Electric Utility Infrastructure Workshop

1. FPSC Electric Utility Infrastructure Workshop Florida Municipal Electric Utilities Alan Shaffer Assistant General Manager - Delivery Lakeland Electric January 23, 2006

2. Florida Public Power Utilities • 33 Municipal Electric Utilities • 1.3 Million customer meters (15% of Floridians) • Distribution • 11,000 miles above ground • 7,600 miles underground • Transmission • 1,700 miles above ground • 70 miles underground • 300 substations • Every storm impacted at least one municipal electric utility

3. Florida’s Public Power Utilities =Winter Park =Winter Park Reedy Creek =

5. Nature of Storm Damage • Transmission System • Most transmission systems had little to no damage • Kissimmee had 74 poles down after Charlie • Keys Energy had sailboat masts into some transmission

6. Nature of Storm Damage • Distribution System • Vero Beach lost 100% of customers from Jeanne, Lakeland lost 80% • Minor to significant pole and wire failures • Most caused from nearby tree/limb failures • Lightning burning down wire • Some pole failure attributed to successive storms and water-softened earth • Vehicles striking poles • Underground • Some flooding in coastal and low areas • Some uprooting from tree failures

7. Nature of Storm Damage • Substations • Most experienced no substation damage • Keys Energy Transformer LTC flooding and 138kv breaker bushing flashover from salt contamination • JEA had 3 substation transformers fail within 1 week attributed to effects of repeated reclosing into distribution faults • Vero Beach had significant substation switchgear damage from water intrusion

8. Mutual Aid • FMEA and APPA Mutual Aid Agreements Utilized • Executed by all FMEA-member utilities • Coordinated through FMEA Executive Director and Mutual Aid Coordinator • Worked closely with electric cooperatives and investor-owned utilities • Supplied FPL with Florida and out-of-state crews • Received aid from not only Florida utilities but municipals as far as Texas, Kansas, Ohio, Wisconsin, and New England

10. Repair Standards • All municipals utilizing external crews assigned their own personnel to oversee work and maintain standards within reason (line and tree crews) • Performed post-restoration inspections to check reconstruction and make additional corrections • All utilities supplied most all their own standard material for their repairs

11. Vegetation Management • Routine Distribution Maintenance • Most municipals have a 3-year trim cycle • Keys Energy is limited to a 6-month growth trim by local ordinance • Tallahassee is on an 18-month cycle • Some like Gainesville and Lakeland include service drops • Herbicides and growth retardant used • Trimmed to four to six foot clearance • Danger trees removed where possible • Outage data used by some to target locations • Joint tree trimming w/ telcos would be beneficial

12. Vegetation Management • Routine Transmission Maintenance • Most municipals maintain an annual inspection/trim cycle • Jacksonville Beach and Gainesville inspect semiannually • Trimmed to 10 to 15 foot clearance

13. Vegetation Management • Post-Storm Inspection • Most utilities inspect as part of the system restoration inspection of outage areas • Some dependence on severity of storm event • Keys Energy and Jacksonville Beach inspect all transmission and main circuits

14. Pole Inspections • All municipals conduct pole inspections • Most are 5 to 8-year cycle • Include conductors and connections • Tallahassee conducts pole-by-pole inspections of circuits with highest number of interruptions

15. Undergrounding • Have discussed undergrounding with community for years • Citizens appreciate learning the pros & cons • Undergrounding does not solve all “hurricane” outage problems • Many citizens reluctant to pay for cost of conversion, even with cost-sharing • Some utilities considering converting overhead lines to underground • Winter Park beginning a selective conversion to underground • Vero Beach converting aging lines when justified • Jacksonville Beach converting all overhead within 3 blocks from ocean

16. Design Changes • Additional movement to spun concrete or steel poles and higher wind load ratings • Transmission and main line distribution • Kissimmee - distribution with 3-phase banks or 3-phase risers • Over-insulating substation tie-lines to reduce salt intrusion outages near coast • Winter Park installing 3-phase gang-operated switches to speed sectionalizing, initiating an undergrounding program • Some relocating rear-lot easements to street right-of-ways • Key West • Wind-load design of 165+ mph • Using more concrete poles • 8-hour battery backup for traffic lights • Using more stainless steel hardware at some locations

17. Other Changes • Several have shortened their pole and line clearance inspection cycles and added more line clearance crews • Several have become more aggressive with removing/topping danger trees • Customers more willing to agree with clearance activities • Majority experienced few repair material shortages but some storm stock inventory levels adjusted based on experiences. • Vendor alliances • Several reported Emergency Operations Plan changes from lessons learned including: • Revised personnel assignments • Training substation or meter personnel to assist T&D • Use retired personnel • Making an earlier determination of mutual aid and contract crew needs and securing logistical needs