The Shimajigawa Dam is a concrete

gravity dam A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. ...

on the Shimaji River north of

Shūnan is a city located in east central Yamaguchi Prefecture, Japan. As of October 1, 2016, the city has an estimated population of 143,959 and a population density of 220 persons per km2. The total area is 656.13 km2. The modern city of Shūna ...

Yamaguchi Prefecture is a Prefectures of Japan, prefecture of Japan located in the Chūgoku region of Honshu. Yamaguchi Prefecture has a population of 1,377,631 (1 February 2018) and has a geographic area of 6,112 Square kilometre, km2 (2,359 Square mile, sq mi). Y ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. The dam was completed in 1980 and was the first dam to be completely constructed with the

roller-compacted concrete Roller-compacted concrete (RCC) or rolled concrete (rollcrete) is a special blend of concrete that has essentially the same ingredients as conventional concrete but in different ratios, and increasingly with partial substitution of fly ash for Po ...

method. The dam creates Takase Lake.

References

{{Dams in Yamaguchi Prefecture Dams in Yamaguchi Prefecture Gravity dams Dams completed in 1980 Roller-compacted concrete dams Shūnan, Yamaguchi