This separate contract was awarded to Tablieh following the original contract B(under ground Works) , covering parts of open air the appurtenant structures of the upstream and downstream dams of Siah Bisheh Pumped Storage Power Project.
| Location | Khuzestan Province |
| Client | Iran Water & Power Resources Development Co. |
| Consultant | Moshanir-Sakoo-Colenco (Switzerland) |
| Lining of Headrace Tunnels Length | 2 km |
| Lower Dam Spillway Length | 160 m |
| Underground Excavation | 79,000 m3 |
| Open Air Excavation | 545,000 m3 |
| Concrete (Power Intake) | 28,720 m3 |
| Concrete Lining & Structures | 115,000 m3 |
| Drilling & Grouting of Head-race Tunnel | 111,700 m |
