The last google aerial image is from 6/23/16. You can get this date by using the Google Earth imagery. The track was overgrown on the 9/26/14 image.
For a crossing to be considered paved over, the asphalt would be totally covering the rails. All they needed to do here was push a few cars through slowly until the flangeway was established. Would be better to not use railroad cars to do that, but if you're human, guess which is easier and quicker