CSX M512 northbound at Monarch, Madisonville, Ky CSX M512 makes its way north from the location know as Monarch on the railroad as it heads north at Madisonville, Ky on the CSX Henderson Subdivision on March 20th, 2023. Tech Info: DJI Mavic 3 Classic Drone, RAW, 24mm, f/2.8, 1/3200, ISO 280.