Κ-11 2149, 2150 LVIII-53 81-333 ... 19 May 1953
View of the drain after the removal of one pair of drain tiles ... north 2150 Horizontal (normal) ... 17 Mar 1959
View of the drain after the removal of one pair of drain tiles ... AMS north 2150 Horizontal (normal) ... 17 Mar 1959