Key Biscayne Substation Armando Fernandez February 14th 2018

Key Biscayne Substation Key Biscayne’s Transformers show no distribution capacity constraints and there are no significant load growth projections in the area Key Biscayne Substation Key Biscayne Distribution details 2 Transformers  (138 – 13 kV) 45 MVA TX #2759 – load 26.6 MVA  45 MVA TX #2760 – load 14.3 MVA   7 – 13kV distribution feeders Feeder MVA Rating 805331 5.1 10.2 805332 8.8 12.7 805333 5.7 11.3 805334 3.9 10.0 805335 8.5 10.5 805336 4.7 805337 4.3

In comparing the data,  the 2017 peak for the island reflects only 1MVA growth since the 2006 peak Planning Cases 2006 Planning case Substation 2006 Actual 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 KEY BISCAYNE 39.4 40.1 40.9 42.1 45.0 46.4 47.7 49.1 50.4 51.8 53.1 54.5 The request to expand Key Biscayne Substation in 2007 was centered on the 2006 planning case which forecasted tremendous growth out of this substation based on some of the highest growth years at FPL 2006 demand projections forecasted FPL would exceed the MVA rating of one of our transformers FPL must always have the ability to handle the load requirements on one of our transformers for redundancy Construction and permitting timetables, drove the need to apply for the expansion of Key Biscayne Substation Due to a 2008 pause on the rate of construction and new services, revised forecast demonstrate more stabilized growth curve which demonstrates no capacity constraints 2017 Planning case Substation 2017 Actual 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 KEY BISCAYNE 40.9 41 41.1 41.3 41.6 42.0 42.4 42.9 43.5 Key Biscayne Substation - there are no distribution capacity constraints and there are no significant load growth projections in the area