GEOMAT performed geotechnical engineering exploration of the existing sediment in the North Evaporation Ponds No. 2 and 3 at the PNM San Juan Generating Station in Waterflow, New Mexico. Our work included field sampling of the soils with hand augers collecting 24 borings as well as five test pits. Characterizations of the soils were made for ponds as well as for soil cap borrow sources. Updates slope stability analyses were performed for the embankments in preparation for pond closure and a geotechnical report of opinions and recommendation delivered for PNM’s use.