Jimmy is right to question it as too sharp, but wrong in the fact that the number between the PC and PT is not degrees but is the Central Angle, preceeded by a triangle. My photo copies are to small to be for sure but it may look like 10 degree Left and not 20. The right hand curve to the east of the trestle is a short 13 degree curve. Someone with the a direct print from the CRRM could help Stanames on this question. The degree of curvature is the number following the foot location and letters: PC (point of Curve).