RESILIENCY OF GUAM’S ELECTRIC UTILITY John M. Benavente, P.E. General Manager JUNE 10, 2019 THE GREAT BLUE PACIFIC Geographic isolation presents unique challenges to disaster readiness and recovery MATERIAL EQUIPMENT MANPOWER 136 mi LOGISTICS 3,950 mi Hawaii EXPERIENCE 5,974 mi California Our Diverse Community and Future Tourism Is Our Economy U.S. Military, Our Largest Stakeholder! 16% Revenue Customer! ‘91 YURI ‘92 GAY ‘15 DOLPHIN ’62 KAREN CAT5 ‘97 PAKA ‘18 MANGKHUT ‘02 CHATA’AN ‘02 HALONG ‘90 RUSS ‘76 PAMELA ‘88 ROY ‘02 CAT4 ‘92 OMAR PONGSONA ‘93 7.8 M w ‘01 7.0 M ‘75 6.1 M ’93 6.5 M w b w ‘02 7.1 M EARTHQUAKE w USVI USVI SAIPAN ‘89 HUGO ‘95 MARILYN ’15 CAT 4 CAT 2 SOUDELOR CAT 4 MUTUAL AID Palau ‘96 ‘18 YUTU TYPHOON CATEGORIES SUSTAINED SURFACE WINDS; PEAK GUSTS Bridge CAT 5 CAT 1: Minimal Typhoon 74 – 95 mph; 95 – 120 mph Collapse CAT 2: Moderate Typhoon 96 – 110 mph; 121-139 mph CAT 3: Strong Typhoon 111 – 130 mph; 121-139 mph Dolphin ‘15 & Mangkhut ‘18 developed into CAT 5 typhoons after passing Guam CAT 4: Very Strong Typhoon 131 – 155 mph; 166-197 mph CAT 5: Devastating Typhoon 156 – 194 mph; 198 – 246 mph *Saffir-Simpson Tropical Cyclone Scale Guam After a Category 5 Typhoon Typhoon Karen in 1962 Post-WW II Pre-WW II Late 1940’s – Early 1960’s Early 1900’s – 1940’s Steel Quonset huts, wood and tin material Wood, lime mortar & stone provided by US military to quickly rebuild homes houses with thatched or Spanish & businesses completely razed by mass bombings tile roofs Early 1960’s Guam Rehabilitation Act of 1963, following Typhoons Karen (‘62) & Olive (‘63) Concrete homes TODAY Reinforced concrete homes Concrete roofs Typhoon shutters Resilient Residential & Commercial Buildings Guam Power Authority Infrastructure Our Business An electric utility that provides monopoly electric services throughout Guam, including U.S. military bases A component unit of the Government of Guam Our Customers Serves a population of approximately 170,000 with a 2018 peak demand of 254 MW and FY 2018 energy sales of 1.57 million MWh Larger customers include Dept. of Defense, various components of Government of Guam, shopping and hotel industry Our Assets Power supply comes from various fuel-oil based generating units with gross capacity of over 420 MW Currently has 25.3 MW of renewable capacity with an additional 160 MW Solar PV and 150 MW of ESS coming online in the next three years to achieve 25% RPS Electric System also includes 29 substations, 189 miles of transmission lines and over 1,608 miles of distribution lines Our Governance Governed by the Consolidated Commission on Utilities (CCU), an elected five-member board Rates subject to the regulations by the Guam Public Utilities Commission (GPUC) Financial Independence No reliance on subsidies from Government of Guam No taxes or PILOTs paid to Government of Guam Diverse customers with growing residential base and modest but long-standing concentration of U.S. military FY 2018 Electric Revenue Composition ($) Largest Customers by Segment Government of Dept. of Segment ($mm) Government of Guam Commercial Guam Defense - 15% Navy Guam Waterworks 16% Commercial $146.3 Pacific Islands Club Authority (Hotel) Residential 117.8 Department of Hyatt Regency Guam Education (Hotel) Residential U.S. Navy 59.1 Guam Airport Pacific Star Resort & 31% Authority Spa Commercial Government of Guam 55.1 39% Total $378.3 Department of Navy is our largest customer Guam Museum Steam: Fuel Oil Diesel Engine Generators: Fuel Oil (IPP) Wind Turbine Solar Combustion Turbine: Diesel Diesel Units (Aggreko) Future Units Combined cycle Solar with batteries Overview Ownership / Operation GPA has about 420 MW of generation capacity GPA provides power through: GPA’s peak demand in 2017 was 261 MW GPA owned and operated units GPA burns fuel oil for its primary generating units. GPA owned units managed by private companies Approximately 25 MW of supply comes from Independent Power Producers owned and operated renewables units Primary Generating Units Capacity Available Unit Year Installed Owner Operator (MW) Baseload Cabras Unit 1 1974 Authority TEMES 66.0 Cabras Unit 2 1975 Authority TEMES 66.0 MEC - Piti Unit 8 1 1999 IPP-MEC MEC 44.2 MEC - Piti Unit 9 1 1999 IPP-MEC MEC 44.2 Intermediate Macheche - CT 1993 Authority Authority 20.0 Yigo – CT 1993 Authority Authority 20.0 Piti Unit 7 1997 Authority Authority 40.0 Dededo CT Plant 1993 Authority Authority 40.0 Aggreko 2 2016 Aggreko Aggreko 40.0 Peaking Diesel Units (10 units) 1993 Authority Authority 40.0 Subtotal: 420.4 Renewable Dandan Solar Project 2015 NRG Solar NRG Solar 25.0 Wind Turbine 2016 Authority Authority 0.3 Total: 445.7 Power Plants Constructed with Concrete or Prefabricated Structure Hardened to 170MPH Sustained Wind Standard Combustion Turbines in Concrete Bunkers Low Profile Switchyard Newly Commissioned SCADA System 115 kV TRANSMISSION SYSTEM Indoor Substations System Hardening • Vital power transmission lines that connect system to key components of Guam’s economy are underground • 60% of system load is served through new underground infrastructure • GPA continues to harden its overhead system by replacing wood poles with concrete (over 87% hardened to date) • GPA continues its village underground hybrid system which places secondary lines underground • Underground projects in the Tumon area. Main line in red is already underground. This project is to underground the high load density laterals Hardened Transmission and Distribution Lines Transmission Towers Mono-Tubes Octagonal Concrete Poles Mono-Tubes and Spun Concrete Poles 170MPH Sustained Wind Rating Mono-Tubes and Spun Concrete Poles 170MPH Sustained Wind Rating Octagonal Concrete Poles (US Navy Built) 34.5KV Transmission and 13.8KV Distribution Lines Concrete vs Wooden Poles Category 5 Typhoon Pongsona in 2002 Assets Critical for Quick Restorations Goal: 25 Unit Fleet Assets for Tower and Mono-Tube Work GUAM WATERWORKS AUTHORITY TOTAL OPERATING ASSETS With Generator No Generator Total Booster Pumps 20 11 31 Waterwells 100 5 105 Wastewater 70 11 81 Laboratory 1 1 TOTAL 191 27 218 Percentage With Generators: 87.6% Automatic Transfer Switch Stand-by Generator Typhoon Yutu (Guam) 12:00 p.m. COR 2 declared Damaging winds expected. CPA Guam 12:00 a.m. 25-Oct 8:45 a.m. 9:00 a.m. TD Yutu forecasted to COR 3 declared 4:15 p.m. 2:00 a.m. impact Marianas as Now Super Typhoon CPA Guam Typhoon 4:15 p.m. Now Typhoon. 5:00 p.m. 10:00 a.m. 1:10 p.m. Guam in TS Watch COR 1 declared COR 4 declared Now Tropical Storm 22-OCT 2018 23-OCT 2018 24-OCT 2018 25-OCT 2018 Monday Tuesday Wednesday Thursday Crews focus on line Internal Pre-Storm Final Internal Pre-Storm Damage assessments of clearing Meeting Meeting critical assets completed Begin pre- & post-storm Storm Prep Work Order GWA sites transferred to GPA employees ordered preparations Issued generator power to report to duty at noon PSCC operating out of Pacific Island MOAs Assets secured Storm-related trouble Fadian & Cabras reviewed in anticipation calls completed (26-Oct) of severe damage to Non-essential employees CNMI excused PLAN TO ACT Troubleshooting crews ACT TO PLAN responded through the storm GPA system demonstrated significant resilience during and after recent typhoons Summary Electric Service Restoration – Typhoon Mangkhut Typhoon Mangkhut (Category 2; max winds of 106 mph) passed just north of Guam on September 10 100% 86% 90% 77% Despite strong and sustained winds from Typhoon 80% Mangkhut, full system recovery was achieved within a 60% 51% few days 40% Typhoon Yutu passed farther north of Guam and had 20% 6% minimal impact 0% Sep-10 Sep-11 Sep-12 Sep-13 Sep-14 Typhoon Mangkhut Impact During the storm, approximately 6% of customers maintained power. The entire system was quickly restored within a few days. $2.5 million of damage Minimal revenue loss (less than $1 million) GPA will receive reimbursement from FEMA of eligible costs Typical reimbursement of 75% Payment pending FEMA Reimbursement GPA team tracked storm costs GPA immediately began dialogue with FEMA for project worksheets MATERIAL •$20M Self Insurance Fund •$15M Inventory •5,012 Line Items EQUIPMENT •25 Bucket Trucks and Support Equipment •Heavy Equipment – Diggers, Cranes, etc. •Contracted Private Assets MANPOWER •100+ Transmission & Distribution •120 Generation •470 Company wide •Linemen through Mutual Aid LOGISTICS •Operational Sectors •Lodging, Meals and Other Support Needs •Land, Air and Sea Transport EXPERIENCE Source & Photo Credits: •Seasoned Skilled Teams Guam Power Authority •Mutual Aide Agreements and Contacts Guam Economic Development Authority •FEMA Reimbursement Team Guam Visitors Bureau •Customer Service Communication Team American Public Power Association Google Images Card & Card Advertising Weather.com Significant Recognitions .