Water began washing over the top of the wall at 11:30 a.m. Parke set out immediately to warn the people in South Fork—two and a half miles away. (Shappee 84)*
*I originally had this posted at 12:45 p.m. although there was conflict within McCullough at 93, 95 and 98. Then I read Shappee above, consistent with McCullough 93, and decided to go with 11:30. I also favored Shappee on the order of water running over the top and Parke's ride because of the confusion in McCullough. The latter has the ride happening before the water ran over the top (93 and 98)