Per Tesla’s Find Us Page, there is a new supercharger location listed as in development at the parking lot where the Flx Fitness is located (2451 Rockwood Ave, Calexico, CA 92231). This site is listed as in development, which based on other locations in Supercharge.info would be a Plan icon. It is listed on Tesla’s site as the Calexico, CA Supercharger
The coordinates are 32.694911359669696, -115.49807163706188