The project that will ultimately lead to the construction of a tunnel to the Belmont Park infield and possibly the installation of an artificial surface at the track gained approval from the New York Racing Franchise Oversight Board Wednesday, according to the Daily Racing Form. The board approved the construction of a retaining wall on the backstretch, which would need to precede the tunnel's construction. Beginning from a planned parking lot on Belmont's backstretch, the tunnel would lead to the track's infield, at approximately the location of the three-quarters pole....