(1) East-West leg of Drain IV in its latest phase. (2) End of the U-Shaped Drain in the North-South Road where it emptied into the earlier phase of Drain IV. (3) Archaic water pipe, from southeast ... AMS northeast 2568 Horizontal (normal) ... July 1982 ... (1) East-West leg of Drain IV in its latest phase. (2) End of the U-Shaped Drain in the North-South Road where it emptied into the earlier phase of Drain IV. (3) Archaic water pipe, from southeast.