Out of interest, which particular route is this? Presumably not Riga to Ergli which was operational before closure.
This is the "8. km - 524. km" railway - a 6 km long (not 516 km as one might assume) part of the Daugavpils ring railway. The line was disused and overgrown (picture), then reconstructed in 2010 to the condition which you can see in the picture. But for some reason the line is still out of use.