Xiyu Reservoir was built in 1968 as

Xiyu Reservoir was built in 1968 as a medium-sized reservoir with a rockfill concrete gravity dam. The original plan had suggested a masonry dam. In 1967, given the availability of low-cost sand and gravel in the local riverbeds, it was changed to a rockfill concrete dam. Large boulders were used for rockfill and sand and gravel were selected to produce concrete in a money-saving manner. As indicated in the dam structure drawing, 100# rubble concrete was used. Xiyu Reservoir has been in operation for many decades. Unfortunately, poor management and lack of construction and completion documents make it difficult to analyze and evaluate its structure to a certain extent.