(Columbus Zoo, 28', 1972, 35-21-b) across pond outlet in Columbus Zoo W. of Powell, Liberty Township, Delaware County, OH. Powell Rd. W. (curves S.) 1.7 miles from jct with Liberty St. in Powell to the zoo on the W. side of the road. Admission. (N40 09.483 W83 07.175) Photos by Greg Hamilton 12-6-14.