After taking a closer look through chart, I noticed the curve from about A93.4-A93.6. It changes my opinion about the sharpest curve on the Frisco. At 11 deg-40 mins, it is sharper than the horseshoe curve on the Clinton Sub at Weaubleau, MO. I don’t know if it qualifies as a true horseshoe curve, since its delta is a mere 136 deg-12 mins. Note the tie comments. Because of the issues with the original concrete ties, one can see sections with wood ties, with concrete ties, and with a mix, where the concrete ties and wood ties were “interlaced”. Curves were held below 6 degrees on the new part of the line, but grades reached a hefty 1.84%. It will be sad to see line go.