The construction of the Feitsui Reservoir in 1981 led to restrictions on building in communities within its catchment zone. Many residents began leaving the area, which resulted in the closure of several mini primary schools--Pishan Primary in 1981, Taiping Primary in 1991, and Yungting Primary in 1996.
民國 70 年翡翠水庫興建後，位於水源區源流一帶社區，因為土地限制利用，人口嚴重外流，民國 70 年碧山國小、80 年泰平國小、85 年永定國小，幾座迷你學校陸續裁廢。