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From Wapda Website

The Project is running through Neelum Jhelum Hydro-Power Company (NJHPC) WAPDA, headed by a Board of Directors (BOD). The Chairman of the BOD is Chairman Wapda. Members of the Board are Chairman Wapda, Member (Water) WAPDA, Member (Power) WAPDA Member (Finance) WAPDA, CEO (NJHPC), CFO of the Company and EX-CEO of NJHPP, Chief Secretary Azad Jammu & Kashmir, Additional Secretary Ministry of Water and Power, Additional Secretary Economic Affair Division, Additional/Special Secretary Ministry of Finance. MD/Chief Executive Officer, the representative of Board of Directors, has his office at Islamabad whereas Project Director (General Manager) has his office at Muzaffarabad (AJ&K).


Location:

Neelum Jhelum Hydroelectric Project (NJHEP) is located in the vicinity Muzaffarabad (AJ&K). It envisages the diversion of Neelum river water through a tunnel out -falling into Jhelum River. The intake Neelum Jhelum is at Nauseri 41 Km East of Muzaffarabad. The Powerhouse will be constructed at Chatter Kalas, 22 Km South of Muzaffarabad. After passing through the turbines the water will be released into Jhelum River about 4 Km South of Chatter Kalas. Neelum Jhelum Hydroelectric Project has installed capacity of 969 MW. The Project will produce 5.15 Billion units of electricity annually.




SALIENT FEATURES

Overall Project Cost

Rs. 274.882 Billions

Installed Capacity

969 MW, Four Units @ 242.25 MW each

Dam, Type

Composite Dam (Gravity + Rock fill)

Height / Length

60 / 160 Meters

Average Annual Energy

5.150 Billion electricity Units Annually

Average Head

420 Meters

Design Discharge

280 Cumecs

Tunneling

Twin Tunnel
Single Tunnel
Tailrace Tunnel

Length 19.54 km each
Length 8.94 km
Length 3.54 km

EIRR

25.46 %

Date of Commencement

30-01-2008

Expected Completion date

November 2016

Implementation Period

About 9 years
 

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A composite Dam (Gravity + Rock fill) 160m long and 60m high will be constructed on Neelum River at Nauseri. It is a Gated Diversion Dam. The dam will create a head pond of 10 million cubic meters which will allow a peaking reservoir of 3.8 million cubic meters to meet daily peaking of power for more than 4 hours. A six gate tunnel intake structure of 280 cumecs capacity will be connected three conventional flushing surface basins installed at their end for taking sediment back into river. The total length of headrace tunnel is almost 48 Km. A 19.54 Km stretch of the tunnel from the Nauseri site will be constructed as a twin tunnel system each with cross sectional area ranging from 52-58m2. The remaining headrace tunnel down to the surge chamber will be a single tunnel having cross sectional area 100m2 approximately. The tunnel portion to be excavated with TBM will be shortcrete lined with a concrete invert while the drill and blast portion of the tunnel will have full face concrete lining. The tunnel crosses under the Jhelum River at EI. 602.0, m asl, approximately 180m below Riverbed. The tunnel is accessed by 8 construction Adits for removal of excavated spoil.

The Surge Chamber consist of 341m high riser shaft and 820m long surge tunnel, four steel lined Penstock tunnels 118 m long and having 3.8 m internal diameter will also be constructed. The underground power Station will have four units with a total capacity of 969 MW. The Power Station will be connected with Gakhar Grid station through 500KV double circuit transmission line.

The Neelum Jhelum Hydroelectric Project is split into the following three main geographic areas.

1. NAUSERI AREA (ALSO KNOWN AS C1)
A 60m high Composite (Gravity + Rock fill) diversion dam and sedimentation basin near Nauseri is on the Neelum River. The dam has 3 No. Radial gates and 2 No. flap gates designed to pass floods of 1000 year recurrence period and also allow the reservoir to be drawn down for sediment flushing. The sedimentation basins are designed to trap sediments that could erode the turbine blades at the powerhouse. The intake works are designed to divert up to 280m3/s into the headrace tunnels.
2. MAJHOI/THOTA (ALSO KNOWN AS C2)

The headrace tunnel is 48 km long including twin tunnel and conveys the water from the intake area at Nauseri to the Powerhouse area near Chatter Kalas. The tunnel crosses under high ground and also across the Muzaffarabad fault zone. A 19.54 Km stretch of the tunnel from the Nauseri be constructed as a twin tunnel system each with x-sectional area ranging from 52-58 m2 and the rest of the route, a single tunnel of x-section area 100 m2 approx, has been proposed. The tunnel portion to be excavated with TBM will be shortcrete lined with a concrete invert while the drill and blast portion of the tunnel will have full face concrete lining. The tunnel crosses under the Jhelum River at 602 m asl, approximately 180m below Riverbed.

3. CHATTER KALAS AREA (ALSO KNOWN AS C3)
The headrace tunnel will feed four vertical-shafts Francis turbines with an installed capacity of 969 MW housed in an underground powerhouse. The water is discharged back into the Jhelum River near Zamainabad through a 3.54 km tailrace tunnel. Associated facilities include a transformer hall, surge shafts, access tunnels, a 500 kv switchyard and housing facilities for the operations and maintenance personnel.

PROJECT IMPLEMENTATION

CONSTRUCTION

Construction Contract was awarded, on July 07, 2007 to M/s CGGC-CMEC Consortium China for implementation of the project at a cost of Rs. 90.90 Billions including Rs. 46.499 Billions foreign component.

Preparatory works including construction of Contractor's camps aggregate crushing & batching plant, site access roads and site/test laboratory have been completed.

Board of Director NJHPC has approved the deployment of Tunnel Boring Machines (TBM) for the Project on 23.11.2010. The Contractor has arranged procurement of two TBMs from M/S Herrenknecht Germany. The deployment of TBMs will certainly help to put the project on scheduled track and recover most part of delayed period envisaged for the project completion.

All the parts of TBM have been arrived at site and TBM assembly has been completed. The Soft Opening/Inauguration of TBM was held on August 06, 2012 and the Honorable Prime Minister of Pakistan graced the occasion by pressing the button.

Both the tunnel boring machines (TBMs) have been assembled and tested. The operation of first TBM started on 28-01-2013 whereas second TBM started mining on 22-02-2013. Operation of both tunnel boring machines (TBMs) remained in progress.


CONSULTANTS -ENGINEERING, DESIGN AND CONSTRUCTION SUPERVISION
Neelum Jhelum Consultants (NJC), a Joint Venture Comprising of five firms including MWH International Inc., USA, NORPLAN A.S., Norway, National Engineering Services Pakistan NESPAK (Pvt.) Limited, Associated Consulting Engineers ACE (Pvt.) Limited, National Development Consultants of Pakistan, have been selected for Engineer Design and Supervision (EDS) as Project Consultants. Consultancy Agreement was signed on May 15, 2008. Letter of Commencement was issued on May 16, 2008. Services have been started since June 03, 2008.

For full details
visit link
http://www.wapda.gov.pk/vision2025/htmls_vision2025/njhp.html
 

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Discussion Starter · #5 ·






Inlet of Diversion Tunnel


Form Work Fixing for Second Lift Concrete Pour For Segment No.01 at Switchyard RCC Retaining Wall


A7 Tailrace Tunnel (01)Station 0+026 Face heading and left wall btw stations and 0+016 to 0+021 and benching after mucking


A8-Access to Surge Shaft (01) Station 0+042 Face drilling of rock bolts


Construction of Left Abutment for Replacement Bridge across River Jhelum is in Progress
 

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Discussion Starter · #10 ·
When this project will be finish.


AFP

ISLAMABAD: Around 63 percent work has already been completed on the ongoing 969 MW Neelum-Jhelum Hydropower Project and all out efforts are being made to complete it before its schedule time 2016 as directed by the Prime Minister Nawaz Sharif.
Official sources told APP here that work on the project was being carried out in full swing and upon completion, Neelum-Jhelum Hydropower Project would contribute 5.15 billion units of cheap electricity to the national grid.
The annual benefits accruing from the project have been estimated at Rs.45 billion, they added.
Neelum-Jhelum Hydroelectric Project (NJHEP) is located in the vicinity Muzaffarabad.
It envisages the diversion of Neelum River water through a tunnel out-falling into Jhelum River. The intake Neelum-Jhelum is at Nauseri 41km east of Muzaffarabad and has installed capacity of 969 MW.
The sources said the project was an important project for generation of low-cost and the government was exploring all possible avenues to solve the energy crisis under the leadership of Prime Minister Muhammad Nawaz Sharif.
The government is also focusing on optimum development of renewable sources of energy particularly hydel, coal, wind, solar and biomass. They said that the government was not only launching new projects in the hydropower sector but also taking steps to expedite the construction work on the ongoing projects.
The sources said that WAPDA was working on a three-pronged strategy to harness the hydropower potential in the country under the directions of the federal government.
They said that the country possessed an identified potential of more than 60,000 MW of hydropower generation, adding that the phased induction of this potential would even out the energy mix, lower power tariff and provide relief to the common man.
He said that the government wanted to start Diamer Basha Dam and Dasu Hydropower Project simultaneously and together with Bunji Hydropower Project, these projects would add a total of 15,000 MW of cheap and environment-friendly electricity to the national grid.
 

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Discussion Starter · #13 ·
The Nation 16th June 2014

Neelum-Jhelum power project work in full swing

June 16, 2014 APP



MIRPUR: Development work on Neelum-jhelum Hydro Power Project is in full swing and it would be completed by the end of year 2016 at estimated cost of Rs.274.882 billion. 969-MW Neelum-Jhelum Hydroelectric Project of vital national importance being constructed in Muzaffarabad district of Azad Jammu & Kashmir, official sources said. First unit for generation of power by the mega project will be completed by December next year (2015), official sources told APP.
They added that entire project would be ready to generate stipulated volume of electricity by the end of year 2016.
The sources continued that completion of Neelum-Jhelum Hydroelectric
Project was very vital to help overcome the electricity crisis, as it would generate 969-MW of low-cost hydel electricity.
The Neelum-Jhelum Hydroelectric Project is being constructed over the
Rivers Neelum in AJK. The project will contribute about 5.15 billion units of electricity annually to the National Grid. Annual benefits of the project have been estimated at Rs.30 billion.
 

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Discussion Starter · #14 ·
Seismology of Neelum Jhelum hydropower project

The Nation 13th Jan 2014

MUHAMMAD ZUBAIR - Neelum-Jhelum Hydro-electric Project is a flagship mega project of immense national importance. The Project is located in Muzaffarabd district in the state of Azad Jammu and Kashmir (AJ&K) at an approximate latitude 34°20’N and longitude 73°40’E, between elevation of 600m and 1100m above sea level. It envisages the diversion of Neelum River water through a tunnel and after producing power, out-falling into the Jhelum River.
The Project utilises a gross head of about 420m by diverting the Neelum River at Nauseri by construction of Composite Dam (Gravity + Rock fill), to the lowest reach of the Jhelum River at Zaminabad through a 52 km long tunnel system including Tailrace Tunnel. A Composite Dam, 160 m long and 60 m high is being constructed on Neelum River at Nauseri 41km north east of Muzaffarabad. 39.2km of the Headrace Tunnel is twin tunnel having dia of about 8.5m each.
The remaining 8.94 km tunnel is a single tunnel of dia 9.6 m. About 10 km stretch of the twin tunnels will be constructed through Tunnel Boring Machines having dia of 8.5m. The Headrace Tunnel is accessed by eight (8) Adits for removal of excavated spoil and other works. The Headrace Tunnel crosses Jhelum River approx. 200m below its bed level. The Power House of the Project is located near Chattar Kalas, 22 km south of Muzaffarabad. Neelum-Jhelum Hydroelectric Project has an installed capacity of 969 MW and will generate 5.15 Billion units of electricity annually.
The Neelum-Jhelum Hydro-electric Project is located in tectonically active mountains of north-western part of the Himalayas, which is separated into three distinct units by a series of parallel and sub-parallel regional thrust faults like, SRT (Salt Range Thrust), MBT (Main Boundary Thrust), MCT (Main Central Thrust), MMT (Main Mantle Thrust).
The initial detailed seismic hazard analysis done for Neelum-Jhelum Hydroelectric Project was based on:
Report on Seismic Hazard Analysis for the Neelum-Jhelum Hydroelectric Project by WAPDA in association with GTZ, HEPO No 148, 1991. ICOLD Bulletin 72: Selecting Seismic Parameters for Large dams, 1989.

The seismic parameters adopted for the tender design on the basis of this study were as follows:
SURFACE INSTALLATIONS
OBE - 0.16 g peak ground acceleration (rock site)
MCE - 0.45 to 0.60 g peak ground acceleration (rock site)
Underground works
OBE - 0.11 g peak ground acceleration
* MCE - 0.30 to 0.40 g peak ground acceleration
A powerful Earthquake (EQ) of October, 2005 with a magnitude of Mw = 7.6 struck the project area and caused widespread damage in Azad Kashmir & adjoining areas. The origin of this EQ was attributed to the movement on three segments of a thrust fault system, including; Balakot - Bagh Fault, Muzaffarabad Fault, Himalayan Frontal Thrust (HFT), Tanda Fault and Murree Fault.
This devastating Earthquake prompted a critical review of the adopted seismic parameters used for the tender design. The values adopted in tender stage design, were considered low based on the work done after October, 2005 event. The review of latest seismic hazard/risk maps for Pakistan was developed by (USGS) Earthquake Hazard Programme and the Building code of Pakistan (Seismic Provision - 2007).
* Seismic hazard map for Pakistan developed by the USGS Earthquake Hazards Programme, indicates a PGA for the Project area in the range of 0.24g to 0.32g.
The Seismic Zoning Map of Pakistan given in the Pakistan Building Code Seismic Provisions (2007) placed the Project area in Zone 4 with Peak Ground Acceleration (PGA) > 0.32g for 500 years return period.
After the October 2005 earthquake, the seismic design parameters adopted for the tender design of the Project were thoroughly reviewed, and seismic design of the Project structures was appropriately revised to account for the following updated seismic parameters which also indicated that the seismic hazard for various parts of the Project is of different level. The updated seismic parameters adopted by project consultants are;
FOR DAM SITE
Operating Basis Earthquake (OBE) 0.34 g peak ground acceleration
Maximum Credible Earth-quake (MCE) 1.16 g peak ground acceleration
FOR POWERHOUSE SITE
Operating Basis Earthquake (OBE) 0.25 g peak ground acceleration
Maximum Credible Earth-quake (MCE) 0.62 g peak ground acceleration
FOR UNDERGROUND WORKS
Operating Basis Earthquake (OBE) 0.17 g peak ground acceleration
Martin Wieland (Member of Panel of Experts) ensured that “for Neelum-Jhelum Hydro-electric Project adequate estimates of seismic design parameters have been made which ensure that the project fully complies with today’s seismic safety standards for a hydropower plant in a highly seismic region. He further stated that, the prediction of strong earthquake, which would include time, magnitude and location, is still impossible and hardly any progress has been achieved within the last 40 years.
Since it is not possible to accurately predict the time, magnitude and location of future earthquakes, but it has been ensured by experts that the revised design of project is based on the seismic parameters, which are as per world-wide standards, can sustain high intensity seismic activity in the project area. The writer is CEO of Neelum-Jhelum Hydroelectric Company.
 
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