A little hard to see at times but they apparently have the first layer of asphalt completed. http://www.youtube.com/watch?v=S64fLqrj9Ns
I think the video says 3200 ft., but I need something to compare that to. How long is the straight at Grattan?
The website says 4,000ft. "a versatile circuit that in its longest configuration will cover 3.65 miles with a 4,000-foot front straightaway and a 2,500-foot backstretch." http://www.drivebluegrass.com/road_course/track_map.html