Elliptical tile drain with associated street levels (continuation of Section ΝΝ, street over Drain A) ... north 824 Horizontal (normal) ... 14 Aug 1947
ΠΠ-5 824, 825 XXVIII-37 XXVIII-47
Notebook ... Arthur W. Parsons, Margaret Crosby ... 801 1000 ... 1947