Structure and associated(?) building at SH67302350.
The structure has four cells, each approximately 6 m x 1 m, arranged in a two by two formation. The walls on the downhill side are aproximately 1 m high. The building behind them is aproximately 3 m x 2.5 m internal.
Gwyn  describes these as settling tanks. However, there are no obvious signs of a water course or launders leading to them. A possible alternative explanation is that they are the foundation of a wooden building, similar to the presumed barracks foundations at Rhinog.
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