Client: Hydraulic Project Investment and Construction Management Board 4

Location: Vu Quang district, Ha Tinh Province

Objectives and Tasks:

• Exploiting Thạch Khê iron mine with flow rate of Q=6.0m3/s and other industrial zones.
• Irrigation for 32,585 hectares of agricultural land;
• Cultivate 5,991 hectares of aquaculture ( 3,500 hectares of freshwater and 2,491 hectares of brackish water).
• Power generation N = 15 MW.
• Water supply for other industries and domestic use; reduce floods and improve the lowland ecological environment (Q=4.0 m3/s); Develop tourism.

Main technical specifications

• Grade of works:           grade  II (Standard TCXDVN 285:2002)
• Capacity:                              775×10⁶ m³
• Main dam:        Zoned earth-rock fill dam; Maximum height Hmax= 53.9m; Crest length  L = 342m;
• Practical Profile Spillway of Ophiserope; Number of gates: 05
• Water intake No. 1: Supply water for irrigation with a flow rate Q = 56.8 m ³ /s, ensure environmental with a flow rate Q = 4.0 m ³ /s for combined power generation; divert construction flow with a maximum flood flow rate of approximately  Q = 610 m ³ /s.
• Diversion tunnel and flood discharge during the construction phase and used as inspection and maintenance corridors during exploitation management; Tunnel diameter D = 7.0m;
• Water intake No. 2: supply irrigation water with design discharge Q design = 8.86 m ³ /s for Huong Son and Vu Quang canals.
• Hydropower plant:
  • Number of units: 03
  • Installed capacity: 15 MW

Total investment amount/Construction cost: 1,938 billion VND (2008)

Contract amount: 2,502,000,000 VND

Duration: 2009 ÷ 2017