Rock Hollow Substation - Texas Electrical Substation Operated by Southwest Texas Electric Cooperative

Rock Hollow Substation is an operational electrical substation located in Texas, United States, owned and operated by Southwest Texas Electric Cooperative. The facility operates at a voltage of 138 kV, placing it in the medium-to-high voltage range typical for distribution and sub-transmission substations in rural cooperative networks. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Electric Reliability Council of Texas (ERCOT), which oversees the majority of Texas's electric grid. As a cooperative-owned asset, it is subject to reliability standards and operational guidelines that ensure stable power delivery to member-consumers in the region. This substation plays a key role in the local electrical infrastructure, supporting the cooperative's mission to provide reliable electricity to rural and semi-urban areas in southwestern Texas. Its location and voltage level indicate it likely serves as a distribution point for residential, agricultural, and small commercial loads, contributing to grid stability and community service.

The substation is situated in a semi-arid region of Texas, characterized by low rainfall and high evaporation rates. The surrounding landscape is primarily rangeland and agricultural fields, with sparse vegetation. Electrical infrastructure in such areas must be designed to withstand temperature extremes and occasional dust storms. The 138 kV voltage level suggests the substation is part of a distribution network that supports local water pumping, irrigation, and rural electrification, which are critical for the region's economy and ecosystem management.