Monticello Dam is a dam in Napa County, California, United States constructed between 1953 and 1957. It is a medium concrete-arch dam with a structural height of 304 ft (93 m) and a crest length of 1,023 ft (312 m). A glory hole is used when a dam is at full capacity and water needs to be drained from the resevoir. 6 Z4 j* V# R E) f4 Q0 `- g " x' O# ]8 L4 H! k& `2 Y e8 t这是Monticello 水坝用来排水的大洞,很神奇! : r6 f* I0 v+ t' _$ F2 o 1 W* H; h. i8 {! u5 v! ~4 y 0 w; ~4 x: _7 w