Haraz Storage Dam

Location

Haraz Storage Dam is being constructed on the River Haraz in about 20 km south of the City Amol in Mazandaran Province.
The dam site is accessible directly by Haraz Road.

History

The supplementary Phase-I Studies of Haraz Storage Dam Project were awarded to Mahab Ghodss Consulting Engineering Co. in 2006. The supplementary designs of the dam tunnels comprising the diversion system, bottom outlets, road diversion tunnel, spillway and headrace tunnel as well as the design of the dam body and powerhouse were carried out by Mahab Ghodss in 2010 and 2013 respectively. At the same time, the general and site supervision over the dam and appurtenant structures were notified to Mahab Ghodss by the client.

Objectives

  • Supplying drinking and industrial waters for 5 cities (115 MCM per annum)
  • Development of agricultural water supply related to the paddy fields of Haraz Plain (about 96000 ha.) together with Chalus Water Conveyance Canal
  • Collection and abstraction of over 14% of the surface runoff of the province
  • Generation of 170 GWh hydropower energy per annum by a 25-MW-capacity powerhouse

Specific Characteristics

  • A portion of Tehran-Amol Main Road was going to be covered by the dam body. This gave rise to devise a complicated design as for the layout of the dam body, hydraulic structures and the dam method statement; on a way that vehicles are now passing through the diversion tunnel and the dam construction works are being carried out without any interference with Haraz Road traffic.
  • Special design of the morning glory spillway making use of the diversion road based on the requirements of Transportation Dept. standards and observing the international design criteria of the morning glory
  • Laying on a high seismically active zone
  • Being located 20 km upstream of Amol that is one of most populous cities of Iran

Project Specifications

Dam Type

Earth Fill with Clay Core

Total Earth Filling Volume

10 MCM

Dam Crest Level

508 masl

Dam Height From Bed Rock

150 m

Crest Length

388 m

Riverbed Level At Dam Axis

385 masl

Alluvium Depth At Dam Axis

About 25 – 30 m

Normal Operation Level

502 masl

Reservoir Total Volume

230 MCM

Spillway Discharge Capacity (PMF)

1000 m3/ sec

Diversion System Design Flood Discharge (50-Yr)

184 m3/ sec

Bottom Outlet Capacity

72 m3/ sec

Water Supply Tunnel Discharge (Irrigation & Powerhouse)

46 m3/ sec