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鄂西北黄龙滩水电站混凝土重力坝,最大坝高107米,正常高水位247米时,库容10.2亿立米。1969年开始作施工准备,1974年5月开始发电,1976年基本完建。1979年汛期,水库达到正常高水位,并在水位24 7～248.71米之间运行了一段时间,大坝运行情况正常。坝址工程地质条件复杂,坝基为古老的正,付结晶片岩。正、付片岩穿插频繁,且在接触处普遍存在硅化、云母化、录泥化等蚀变现象,构成软弱带。软弱带宽度一般0.5米左右,最大宽度可达3～4米。软弱带变形模量5,000～10,000公斤/厘米~3,饱和抗压强度不到100公斤/厘米~2。坝基内虽无规模较大的断裂构造,但节理裂隙十分发育、部分夹泥严重。
Northwest Hubei Huanglongtan Hydropower Station concrete gravity dam, the maximum dam height of 107 meters, the normal high water level 247 meters, the storage capacity of 1.02 billion cubic meters. Construction preparations began in 1969, in May 1974 began generating electricity, basically completed in 1976. During the flood season in 1979, the reservoir reached a normal high water level and operated for a period of time between 247 and 248.71 meters of water level. The dam operated normally. Dam site complex geological conditions, the dam foundation for the ancient positive, pay for the crystallization of schist. Positive, pay schistosity interspersed frequently, and in contact with ubiquitous silicification, mica, mud and other alteration phenomenon, constitute the weak zone. Weak width of about 0.5 meters, the maximum width of up to 3 to 4 meters. Soft zone deformation modulus of 5,000 to 10,000 kg / cm ~ 3, the compressive strength of less than 100 kg / cm ~ 2. Although there is no large-scale fracture structure in the dam foundation, the joint fissures are well developed and some of the mud is serious.