This is the cleaning locus for the W corner of WSDB during its 2nd extension (to 6 m), so it is between meters 5 and 6, and .75 m toward the NE. The soil is rich, dark, loamy, and there are many rocks in the locus, which make elevs difficult to take on the soil. Opening elevs: N: 2137.72; W: on rock; S: 2137.62; E: on rock; center: 2137.77. Its closing elevs: N: 2137.375; W: 2137.425; S: 2137.485; E: 2137.545; center: 2137.245.