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Uma Oya Underground Excavation

Underground Excavation Uma Oya Sri Lanka

The Uma Oya Multipurpose development project is a water transfer, hydropower and irrigation project in the south-Eastern part of the central highland region of srilanka. The main part of the scheme is situated in the south-western part of the Badulla district in the province of Oya. The project will transfer annual long-term average water quantity of 145 mcm for irrigation purpose and will develop a head of a more than 700 m for the production of electricity in a power plant with rated capacity of about 120 mv. The Project Consists Of Two Rcc Dams. The Frist One is To Be Built on Uma Oya River at Puhulpola Region. The Water from Uma OyaRiverbe linked through an approximately 3.7 km long link tunnel (further called conveyance tunnel) into the reservoir of the dyraaba dam built on mahatotillaoya river. from where an approximately 15.2km long headrace tunnel and 595m high vertical shaft will convey water to the underground powerhouse. The discharge from the powerhouse will be directed into alikotaoya River Through an approximately 3.6 km long tailrace tunnel, Which Is a tributary of kirindiOya River.


Status of Project: Completed

Project Highlights

Role of Parhoon Tarh: Contractor
Client: Farab Company
Consultant Engineer: Mahab Ghodds Consultant
Location: Sri Lanka
Project Cost: 6.3 million USD
Project Duration: 215 Days

 

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Project Volumes

Concrete Volume: 2,000 m3
Reinforcement & Steel Works: 40 tons
Formwork: 500 m2
Excavation: 24,500 m3

Project Specification

Length of Tunnel: 750 m
VCA Tunnel Diameter: 2.55 m
LHT Tunnel Diameter: 2.15 m
LC Tunnel Diameter: 2.15 m

Project Goals

  • Construction of some spaces for installations and fittings in order to transfer water from Headrace Tunnel to Powerplant

Project Stakeholders

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Uma Oya Headrace Tunnel

Hydropower Plant Tunnel Uma Oya Sri Lanka

The Uma Oya Multipurpose development project is a water transfer, hydropower and irrigation project in the south-Eastern part of the central highland region of srilanka. The main part of the scheme is situated in the south-western part of the Badulla district in the province of Oya. The project will transfer annual long-term average water quantity of 145 mcm for irrigation purpose and will develop a head of a more than 700 m for the production of electricity in a power plant with rated capacity of about 120 mv. The Project Consists Of Two Rcc Dams. The Frist One is To Be Built on Uma Oya River at Puhulpola Region. The Water from Uma OyaRiverbe linked through an approximately 3.7 km long link tunnel (further called conveyance tunnel) into the reservoir of the dyraaba dam built on mahatotillaoya river. from where an approximately 15.2km long headrace tunnel and 595m high vertical shaft will convey water to the underground powerhouse. The discharge from the powerhouse will be directed into alikotaoya River Through an approximately 3.6 km long tailrace tunnel, Which Is a tributary of kirindiOya River.


Status of Project: In Progress

Project Highlights

Role of Parhoon Tarh: Contractor
Client: Farab Company
Consultant Engineer: Amberg Engineers
Location: Sri Lanka
Project Cost: 35.5 million USD
Project Duration: 25 Months

 

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Project Volumes

Concrete Volume: 1,000 m3
Excavation: 222,000 m3

Project Specification

Length of Tunnel: 15 km
Tunnel outer Diameter: 4.3 m
Tunnel inner Diameter: 3.8 m

Project Goals

  • Construction of Headrace Tunnel -15 Km Length- of the Uma Oya Multipurpose Development Project in Sri Lanka by mechanized method

Project Stakeholders

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Access Road to Seymareh

Access Road to Seymareh

The scope of works for this contract includes all civil and related tasks in order to construct the access road of the Seymareh hydro power plant.


Status of Project: Completed

Project Highlights

Role of Parhoon Tarh: EPC Contractor as member of Tablieh-Parhoon Tarh J.V.
Client: Iran Power and Water Development Company
Consultant Engineer: Mahab Ghods Consulting Engineers
Location: Iran-Ilam Province
Project Cost: 15 million USD
Project Duration: 20 months

 

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Project Volumes

Embankment: 300,000 m3
Excavation: 1,200,000 m3 (In Rock)
Masonry: 30,000 m3

Project Specification

Length of Road: 10.7 km
Width of Road: 15 m
Bridges & Walls: 30 Nos.

Project Goals

  • Providing the possibility of accessing to the main site of the Seymareh Hydropower plant

Project Stakeholders

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Isfahan 230 KV Cable Tunnel

Isfahan 230 KV Cable Tunnel

Description of ProjectThe contract of this project consists of designing and construction of 230 KV cable tunnel located between Isfahan university and Taleghani post with total length of 4,600 m. Designing and construction of this project includes tunnel construction with ventilation shaft of inauguration time, procurement, delivery, erection and operation of the electrical and mechanical equipment’s of inauguration time that will be done by contractor. It was concluded to implement a TBM due to high speed and great performance of this machine, critical location of the project in addition to traffic congestion problems. Parhoon Tarh Co. is responsible for all related works in a framework of an EPC contract, which was awarded to Tablieh-Parhoon Tarh J.V.


Status of Project: Completed

Project Highlights

Role of Parhoon Tarh: EPC Contractor as member of Tablieh-Parhoon Tarh J.V.
Client: Isfahan Regional Power Company
Consultant Engineer: Farbar Consulting Engineers
Location: Iran-Isfahan Province
Project Cost: 27 Million Euro
Project Duration: 30 months

 

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Project Volumes

Concrete Volume: 11,000 m3
Reinforcement & Steel Works: 1,200 tons
Formwork: 43,000 m2
Excavation: 40,000 m3

Project Specification

Length of Tunnel: 4.6 km
Tunnel outer Diameter: 3.00 m
Tunnel inner Diameter: 2.44 m

Project Goals

  • Power transmission network of Isfahan
  • Carrying 230 KV cables from the first Islam Abad power plant

Project Stakeholders