By Hannah Grover
Bernalillo County released updated stormwater management guidance this week for large-scale solar projects.
The new guidance comes amid increased interest in utility-scale solar projects in New Mexico following the passage of the 2019 Energy Transition Act and the 2021 Community Solar Act.
According to a press release, the county hopes to encourage solar development while also ensuring sustainable stormwater management practices.
Because of the nature of large solar arrays, the stormwater can flow between panels and seep down into the soil. The updated criteria states that panels should “be configured to provide permeable space between [photovoltaic] array rows so that runoff from the panel rows remains hydrologically disconnected.”
The guidance includes criteria for evaluating grading and drainage plans. Bernalillo County used best management practices and regulatory compliance developed by the U.S. Environmental Protection Agency to develop the criteria.
“The revisions to this guidance underscore our ongoing commitment to balancing renewable energy development with responsible environmental stewardship,” Deputy County Manager of Public Works Elias Archuleta said in a press release. “It creates a pathway for solar expansion while ensuring long-term sustainability and compliance with federal and county standards.”
Stormwater management will help prevent erosion and reduce runoff during heavy rain events. It will also help protect water quality.
The updated criteria also includes post-construction revegetation expectations. The document further states “existing vegetation should be retained, undisturbed wherever possible.”
Bernalillo County is accepting public comment on the document. Comments can be submitted to water@bernco.gov.