Power supply

2022 Fuel Diversity

◆ Hydro, 5.5%

◆ Coal, 42.5%

◆ Natural Gas, 15.2%

◆ Oil, 33.1%

◆ Solar, 0.03%

◆ Wind, 3.7%

Power supply engineering (PSE)

Power Supply Engineering (PSE) supports our generation sites and dispatch through collaborative, efficient and cost effective solutions. The past year, PSE has spearheaded and contributed to various capital and operating projects involving waste water treatment, boiler combustion systems, distributed control systems, SCADA and more.

Developed and rolled out a Management of Change program for Power Supply.

Contributed to Healy 2 shutdown guidance committee.

Upgraded North Pole Distributed Control System (DCS).

Extended Healy DCS read-only access across entire GVEA corporate domain.

Instituted training programs for Healy E&I department.

Supported grid upgrades with T&D Engineering and the E-shop. Created and implemented a chain wear monitoring program for the submerged drag conveyor to forecast chain replacement.

Environmental

□ Prepared and submitted over 200 regulatory and compliance reports during the year.

□ Managed the annual stack testing programs at the Healy and North Pole Plants.

□ Coordinated and supported key aspects of the GVEA Strategic Generation Planning process.

□ Assisted E-SHOP in establishing a vegetation management program at multiple substations and communication sites.

□ Reviewed and updated Spill Prevention, Control and Countermeasure (SPCC) plans for Healy, North Pole, and Zehnder/HQ.

□ Received two comments from GVEA personnel we serve indicating that our work is appreciated, four comments indicating that others were really glad they don’t have our job, and at least seventeen comments comparing our job to the herding of felines.

□ Successfully negotiated renewal of Healy’s Alaska Pollutant Discharge Elimination discharge permit.

□ Assisted with promptly addressing a fuel oil tank leak at Zehnder.

□ Supported Healy with removal of two, 25,000 gallon underground storage tanks and subsequent remediation in preparation for the Unit 1 SCR project. Supported Healy through final removal of the ash ponds.

□ Reported 14 oil spills, up from five in 2021.

□ Supported engineering, Healy operations and management with planning and design of Unit 1 wet ash management system to replace to the Unit 1 ash ponds.

□ Managed groundwater monitoring and corrective action for Coal Combustion Residual compliance at Healy.

□ Assisted Healy with the disposal of over 26,000 lbs of lime, identifying a means of disposal that saved up to $30,000 in disposal costs.

□ Successfully renewed North Pole’s pretreatment discharge permit.

□ Demonstrated SPCC compliance at Zehnder in an inspection with the Environmental Protection Agency.

□ Directed contaminated groundwater management at headquarters and BESS sites.