Trace the abandoned roads and railroads around the Yanba Dam from the sky 

Yanba Dam is a dam project that is under construction in Naganohara, Agatsuma District, Gunma Prefecture, Japan.
The project is currently under construction, with completion slated for 2020.
The area around the Agatsuma Valley and Kawarayu Onsen, National Route 145 and the JR Agatsuma Line at the dam site will sink into the reservoir.
Test flooding will start on October 1, 2019, and it is expected that the water will always accumulate to the full water level from January to February 2020.