| Khersan-3 Dam | |
| Location Map: | Iran |
| Coordinates: | 31.2479°N 50.9763°W |
| Country: | Iran |
| Location: | Atashgah, Chaharmahal and Bakhtiari Province |
| Status: | UC |
| Construction Began: | 2007 |
| Opening: | 2015 |
| Purpose: | Power, flood control, regulation |
| Owner: | Iran Water and Power Resources Development Co. |
| Dam Type: | Arch, double-curvature |
| Dam Height: | 1950NaN0 |
| Dam Length: | 4700NaN0 |
| Dam Width Crest: | 60NaN0 |
| Dam Width Base: | 400NaN0 |
| Dam Volume: | 11000000NaN0 |
| Dam Crosses: | Khersan River |
| Spillway Type: | Controlled |
| Spillway Capacity: | 6300m3/s |
| Res Name: | Khersan-3 Reservoir |
| Res Capacity Total: | 11584000000NaN0 |
| Res Catchment: | 77330NaN0 |
| Res Surface: | 24.50NaN0 |
| Res Elevation: | 14320NaN0 |
| Res Max Length: | 400NaN0 |
| Res Max Width: | 4000NaN0 (average) |
| Plant Hydraulic Head: | 1770NaN0 (design) |
| Plant Commission: | 2015 |
| Plant Turbines: | 4 x 100 MW Francis-type |
| Plant Capacity: | 400 MW |
| Plant Annual Gen: | 1121 GWh [1] |
Khersan-3 dam is a hydroelectric arch dam currently under construction on the Khersan River, a tributary of the Karun River, in Iran. When complete it will have an installed capacity of 400 MW. It is situated near Atashgah in Chaharmahal and Bakhtiari Province and is a complementary dam to Khersan project along with the proposed Khersan-1 and Khersan-2 dams. Construction began in 2007 and it is expected to become operational in 2015.[2]