Dataset - Geospacial Existing Hydropower Assets (EHA) Alaska Plant Database Extension v1.0

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Water Power
Alaska
Hydropower

Existing Hydropower Assets (EHA) 9505 Alaska Plant Database

This dataset is an extension and subset of the Existing Hydropower Assets (EHA) Plant Database, 2025, released by Oak Ridge National Laboratory through HydroSource covering hydropower plants in Alaska. The extension enhanced EHA to support modeling performed under the Department of Energy Hydropower Office's SECURE Water Act Section 9505 Fourth Assessment (9505).

Data Files

  • EHA_PNNL_Alaska_v1.0.gpkg: spatial dataset containing the location of the powerhouse and plant characteristics
  • EHA_PNNL_Alaska_POD_v1.0.gpkg: spatial dataset containing the location of the point-of-diversion and plant characteristics
  • EHA_PNNL_Alaska_v1.0.xlsx: spreadsheet containing plant characteristics matching the attribute table of the spatial dataset

Data Description

Enhancements to the dataset include:

  • Updating plant’s spatial locations to explicitly represent the location of the powerhouse
  • Identifying a plant’s point-of-diversion (source of water) spatial location
  • Adding State of Alaska Plant ID
  • Adding Intertie Region and Alaska Energy Region as defined by the Alaska Energy Authority
  • Revising the County attribute to reflect Alaska Boroughs and Census Areas
  • Revising the Pt_Own, OwType, and Dam_Own attributes with updated information
  • Adding FC_Proj attribute containing the FERC project name

Users are referred to HydroSource for descriptions of fields included in the original dataset. Descriptions for fields added to the dataset are provided below:

Field — Description — Source

FC_Proj — FERC license project name — FERC

AK Plant ID — State of Alaska plant ID — 2014-2021 Alaska Energy Statistics Table 2.3b

IntertieName — State of Alaska electricity intertie — 2020-2021 Alaska Energy Statistics Table 2.3b

EnergyRegion — State of Alaska electricity region — 2020-2021 Alaska Energy Statistics Table 2.3b

Dcom — Flag noting plants that have been decommissioned or are inoperable (see below) —

FERC and utilities

Dcom includes:

Abbreviation — Meaning — Description

SL — License Surrendered — FERC license has been surrendered

RM — Removed — Plant has been removed

Release Notes

Notable changes made to the datasets from the original 2025 EHA:

  • Newhalen (EHA_PID hc9125_p01; EIA_PID 7183) has been removed as it is a duplicate of Tazmina (EHA_PID hc2135_p01; EIA_PID 7547)
  • Chignik Lagoon has been added; no EHA_PID has been assigned
  • Gunnuk Creek has been added; no EHA_PID has been assigned

Disclaimer

Every attempt was made to ensure accuracy, however errors may exist. Please note that this dataset was created from the 2025 version of EHA. EHA is updated annually and newer versions may contain more reliable information depending on need.

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