San Juan Generating Station

The San Juan Generating Station is pictured in Waterflow.

A ruling by state regulators that allows the San Juan Generating Station to continue operating is being challenged by a Santa Fe-based environmental group. A ruling by state regulators that allows the San Juan Generating Station to continue operating is being challenged by a Santa Fe-based environmental group.

The San Juan Generating Station as seen Aug. 1 in Waterflow.

Tom Fallgren, plant manager at the San Juan Generating Station, on Aug. 1 stands in the area in Waterflow where a new natural gas-fired peaking plant is expected to be built. The San Juan Generating Station can be seen in the background.

Plant manager Tom Fallgren approaches the San Juan Generating Station on Aug. 1 in Waterflow.

Tom Fallgren, plant manager at the San Juan Generating Station, said on Aug. 1 that a new natural gas-fired peaking plant will be built in a parking lot next to the electrical substation seen here in Waterflow.

The San Juan Generating station is seen, Thursday, June 16, 2016 in Waterflow.

Steam billows from the stacks of the San Juan Generating Station, Wednesday, Jan. 13, 2016 in Waterflow. Steam billows from the stacks of the San Juan Generating Station Wednesday in Waterflow.