Shihgang Dam

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Coordinates: 24°16′58.3″N 120°46′08.3″E / 24.282861°N 120.768972°E / 24.282861; 120.768972

Shihgang Dam
Shih Gang Earthquake 3.JPG
Shihgang Dam
Official name Shihgang Dam
Location Shigang District / Dongshi District of Taichung, Taiwan
Purpose flood control, water storage, regulation, recreation
Status In use
Construction began 1974
Opening date 1977
Operator(s) Ministry of Economic Affairs (Taiwan)
Dam and spillways
Type of dam Gravity Dam
Impounds Dajia River
Height 25 m (82 ft)
Length 352 m (1,155 ft)
Dam volume 141,300 m3 (4,990,000 cu ft)
Spillway type 15 controlled drum-gate
Spillway capacity 13,000 m3/s (460,000 cu ft/s)
Total capacity 3,380,000 m3 (119,000,000 cu ft)
Active capacity 1,430,000 m3 (50,000,000 cu ft)
Catchment area 1,061 km2 (410 sq mi)
Surface area 0.645 km2 (0.249 sq mi)
Normal elevation 267 ft (81 m)
Central Region Water Resources Office, Water Resources Agency, Ministry of Economic Affairs - SHIGANG DAM

Shihgang Dam (Chinese: 石岡壩; pinyin: Shígāng Bà) is a concrete gravity barrage dam across the Dajia River in Shigang District and Dongshi District of Taichung, Taiwan, located near Fengyuan District. The dam was built from 1974 to 1977 for flood control and irrigation purposes, and stands 35.2 m (115 ft) high and 357 m (1,171 ft) long, holding a reservoir with an original capacity of 3,380,000 m3 (2,740 acre·ft).[1]

The dam was heavily damaged in the 921 earthquake of 1999, which caused the collapse of its northern end. Subsequently, an embankment cofferdam was built to prevent water from flowing through the breach, while the collapsed section has been retained as a memorial. Since this reduces the storage capacity of the dam, it is no longer used for flood control, but remains an important source of agricultural water.

See also[edit]


  1. ^ Reservoirs and Weirs in Taiwan (in Chinese). Taiwan Water Resources Agency, Ministry of Public Affairs. p. 328.