| Shigang Dam | |
| Name Official: | 石岡壩 |
| Dam Crosses: | Dajia River |
| Location: | Shigang District / Dongshi District of Taichung, Taiwan |
| Dam Type: | Gravity Dam |
| Dam Length: | 352m (1,155feet) |
| Dam Height: | 25m (82feet) |
| Dam Volume: | 141300m2 |
| Spillway Type: | 15 controlled drum-gate |
| Spillway Capacity: | 13000m3/s |
| Purpose: | flood control, water storage, regulation, recreation |
| Status: | In use |
| Operator: | Ministry of Economic Affairs |
| Res Capacity Total: | 3380000m2 |
| Res Capacity Active: | 1430000m2 |
| Res Catchment: | 1061km2 |
| Res Surface: | 0.645km2 |
| Res Elevation: | 267feet |
| Website: | Central Region Water Resources Office, Water Resources Agency, Ministry of Economic Affairs – SHIGANG DAM |
Shigang Dam is a concrete gravity barrage dam across the Dajia River in Shigang District and Dongshi District of Taichung, Taiwan, located near Fengyuan District.[1] The dam was built from 1974 to 1977 for flood control and irrigation purposes, and stands 35.2m (115.5feet) high and 357m (1,171feet) long, holding a reservoir with an original capacity of 3380000m2.[2]
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.