US Hydropower & Environmental Mitigations: A 1998-2023 inventory of mitigation measures inside licensing documents

Publication Date:
June 26, 2026
Authors:
Thomas A. Ruggles, Erik H. Schmidt, Arjun Bhattacharya, Hong-Jun Yoon, Ashar Khan and Debjani Singh
Organization:
HydroSource
Institution:
Oak Ridge National Laboratory

Citation

Ruggles, T.A.,  E.H. Schmidt, A. Bhattacharyya, H.J. Yoon, A. Khan, and D. Singh. 2025. US Hydropower & Environmental Mitigations: A 1998-2023 inventory of mitigation measures inside licensing documents. Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA. https://doi.org/10.21951/Mitigations_StoryMap/3001501

Overview

This StoryMap explores trends in environmental mitigation measures for FERC licensed hydropower projects in the US and how they relate to aquatic endangered species critical habitats. FERC license documents contain a wealth of information buried inside extensive documents. The StoryMap describes how researchers leverage natural language processing (NLP) models, a form of artificial intelligence (AI), to extract information from these documents. 

Science Themes

Related Records

Environmental Mitigation Co-occurrences by HUC02 Region

This interactive visualization shows the spatial and temporal trends of environmental mitigations present in Ruggles et al (2025), which contains a comprehensive inventory of mitigations required by the Federal Energy Regulatory Commission (FERC) licensed hydropower facilities from 461 licenses that were issued from 1998 to 2023. The visualization features a map of HUC02 regions with donut charts showing the breakdown of mitigations by category, and once selected, a more detailed breakdown of subcategories for a given region. It also allows users to explore the co-occurrence of mitigations to help answer questions about the frequency with which any two mitigation measures have been undertaken together.

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