Report on Neelum Jhelum Hyrdoelectic project

REPORT ON NEELUM JHELUM HYDROPOWER
PROJECT
Project & Construction Management
GROUP MEMBERS
RUBNAWAZ
2015-UET-CCET-CIVIL-02
MUHAMMAD KAMAL UD DIN ANWAR
MUZAMMIL HUSSAIN
ZOHAIB AHMAD
SUBMITTED TO
ENGR. USMAN ANWAR SAHIB

REPORT ON NEELUM JHELUM HYDROPOWER PROJECT
Chenab College of Engineering & Technology Gujranwala Pakistan
TABLE OF CONTENTS
 History
 Location
 Power House
 Transformer Hall
 Busbar Tunnel
 Draft Tube
 Switch Yard
 Wapda Colony
 Client
 Consultant
 Contractors
 Introduction
 Land Acquisition
 Design & Work
 Concrete Gravity Dam
 NJHEP Dam Site
 Rock Fill Dam
 Spillways
 Tunnels
 Geographic Area of NJHEP
 Nauseri Area (C1)
 MAJHOHI/THOTA (C2)
 CHATTER KALAS AREA (C3)
 Benefits of the Project
 Criticism on the Project

History:
After being approved in 1989, the design was improved, increasing the tunnel
length and generation capacity. The project was intended to begin in 2002 and be completed
in 2008 but this time-frame experienced significant delays to rising costs and funding.
Additionally, the 2005 Kashmir earthquake which devastated the region required a redesign
of the project to conform to more stringent seismic standards.
On 7 July 2007, the Chinese consortium CGGC-CMEC (Gezhouba Group and
China National Machinery Import and Export Corporation) were awarded the contract to
construct the dam and power station.
Location:
The Neelum Jhelum Hydropower Plant is part of an under construction run of the
river hydroelectric power scheme designed to
divert water from the Neelum River to a power
station on the Jhelum River. The power station is
located in Azad Kashmir, 22 km south
of Muzaffarabad and will have an installed
capacity of 968 MW. Construction on the project
began in 2008 after a Chinese consortium was
awarded the construction contract in July 2007.
The first generator is scheduled to be
commissioned in July 2017 and the entire project
was expected to be complete in December 2017.
 Power House:
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.
 Transformer Hall:
The turbines inside powerhouse will transfer electricity to the
transformer hall located adjacent power house where to a step down transformer will
transfer the electricity to the switch yard through cable tunnels.
 Busbar Tunnels:
Tunnels connecting transformer hall and power house.
 Draft Tubes:
The water after impacting the turbines will be transported to tailrace
tunnel through draft tubes passing below the busbar tunnels.
 Switch Yard:
Cable tunnels will connect transformer hall with the 500KV switch
yard located outside the tunnel.
 WAPDA Colony:
A residential colony will be built at the C3 site for the employees
of Wapda that will work at the site once it is operational

Client:
Pakistan Water and Power Development
Authority (WAPDA) was established through an act
of Parliament in 1958. It is an autonomous and
statutory body under the administrative control of
the Federal Government. The authority consist of a
chairman and three members (Water, Power, and
Finance). Wapda was unbundled in the year 2007
whereby the functions of its power wing were
redefined as Hydel power generation & operation
maintaince of power houses.
Wapda is client of NJHEP project which cost about 404 billion rupees. First
time, it’s a big diverse nature project is implemented in Pakistan to meet energy crisis.
Project initialised in 2008 and expected completion date is June, 2017. Estimated power
generation is 969MW.
Consultant:
To ensure quality of
project, NJC is consultant. NJC (Neelum
Jhelum Consultant) is basically a joint venture
of differential and international companies.
NJC is joint venture of five firms, in which
three belongs to Pakistan like ACE, NESPAK
and NDC one from Norway which is
NORPLAN and one from America which is
MWH.
Contractors:
In April 2006, the
Wapda had cleared three international bidders
for a contract to develop the project. The
Chinese consortium of CMEC and CGGC
emerged as the lowest bidder at $1.30 billion.
The other bidder, China International Water &
Electric Corporation (CWE), quoted $1.80 billion. CGGC and CMEG are contactors of
NJHEP, both firms belong to China. CGGC is executing Civil work and CMEG is working
for Mechanical and Electrical work.

Introduction:
NJHEP is basically a power generation project in Azad Kashmir at Neelum
Jhelum River which is made possible by puncturing Neelum River to Jhelum River through
Tunnels. Neelum River is flowing at more elevation than Jhelum River so therefore to
develop head for power generation Neelum is punctured into Jhelum. It’s ranked the 41st in
large of Hydroelectric tunnelling project in the world most modern techniques of tunnelling is
used on Neelum Jhelum which is Tunnel Boring Machine. On NJHEP there is diversity of
work so it’s divided into different sections for ease and smooth execution.
Land Acquisition:
 Project envisages acquisition of approx, 2400 canals of private and State land in the
project Area in Muzaffarabad District.
 So far WAPDA has transferred Rs.705 Million to Govt. of AJ&K as provisional cost
of the Notified Private and state land.
 WAPDA has taken possession of 80% land; and arrangements are being made to
acquire the remaining land.
Design & Work:
The Neelum–Jhelum Dam will be a 47 m tall and 125 m long gravity
dam. It will withhold a reservoir with an 8,000,000 m3 capacity of which 2,800,000 m3 is
peak storage. The dam diverts up to 280 m3/s of the Neelum southeast into a 28.5 km long
head-race tunnel, the first 15.1 km of the head-race is two tunnels which later meet into one.
The tunnel passes 380 m below the Jhelum River and through its bend. At the terminus of the
tunnel, the water reaches the surge chamber which contains a 341 m tall surge shaft (to
prevent water hammer) and an 820 m long surge tunnel. From the surge chamber, the water is
split into four different penstocks which feed each of the four 242 MW Francis turbine-
generators in the underground power house.
Concrete gravity dam:
Concrete gravity dam basically consist of different components
like concrete walls, piers, spillway, stilling basin, drainage gallery and debris channel.
It has upstream and downstream. Upstream level is more than
downstream level. On downstream level stilling basin exist. Upstream level is 963m and
downstream level is 961m.

NJHEP Dam site:
Maximum Reservoir level 1015 m
Reservoir Capacity at Maximum Reservoir level 10.2 million cumecs
Minimum Reservoir level 1008 m
Reservoir Capacity at Maximum Reservoir level 6.4 million cumecs
Useable Water 3.8 million cumecs
PMF 1018 m
Top elevation of dam 1019 m
Rock Fill Dam:
Rock fill dams are embankment of compacted free-draining
granular earth with an impervious zone. The earth utilized often contain a high percentage of
large particles, hence the term “Rock fill”. The impervious zone may be on the upstream and
made of masonry, concrete, plastic, membrane, steel sheet piles, timber and many other
materials. The impervious zone may be within the embankment in which case it is referred to
as a core.
Spillways:
There are spillways which function is
water controlling from upstream to downstream.
Three radial gates are install on spillways. All work
is carried out in different sections, therefore
different joint exist which are cold, contraction and
expansion joint but expansion joints are not at dam
site because temperature is low at due to cold
weather. These joints are grouted to avoid seepage
of water. Drainage gallery is also designed in
spillway to drain water grouting and inspection.
Spillways are generally opened when water flow is
exceeded than reservoir capacity and flood
occurred. Spillway bottom level is 959 m and top
level is 1019 m.
Tunnels:
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 the river.
The total length of headrace tunnel is
almost 48 Km. A 9.54 stretch of the tunnel from the

Nauseri site will be constructed as twin tunnel system each with cross sectional area varying
from 52-58 meter per square.
Batching plant:
A batching plant, is equipment that combines various ingredient
to form concrete. Some of these inputs includes water, air, admixture sand aggregate, fly ash,
silica fume, slag and cement. There are two main types of concrete plants: Dry mix plant and
wet mix plant.
Geographic areas of NJHEP:
The Neelum Jhelum Hydroelectric project is split into following three main geographic areas.
 Nauseri Area (C1):
A 60m
high Composite diversion dam and
sedimentation basin near Nauseri is
on the Neelum River. The dam has 3
Radial gates & 2 flap gates designed
to pass floods of 1000 years
recurrence period and also allow the
reservoir to be drawn down for
sediment flushing.
 Majhohi/Thota (C2):
The headrace tunnel is 48 km long including twin tunnel
and convey 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 & Tunnel
Boring Machine (TBM) will be shortcrete lined with a concrete invert while the drill and
blast portion of the tunnel will have full face concrete lining.
 Chatter Kalas Area (C3):
The headrace 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 3.54km tailrace tunnel.
Associated facilities include a transformer hall, surge shafts, access tunnels, a 500 KV
switchyard and housing facilities for the operations and maintenance personal.

 Benefits of the project:
 Reduction of dependent on thermal power.
 Saving in foreign exchange.
 Employment opportunity during construction and operation.
 Improved standard of living infrastructure.
 Social-economic uplift of the area.
 The generation of cheap electricity will help to reduce existing tariff.
 Reduction in Load sheding.
 Project will create an enhance tourism opportunities.
 Opportunities of new jobs for local people during construction & operation of
project.
 Overall growth in economy due to induction of cheap Electricity. This will help
reduction in production cost of goods used locally and especially export goods to
make them more competitive with other countries.
 Social & Economic development of local area and population.
 Reduction of floods in Jhelum River.
 Criticism on the project:
 Beauty of this area is enhanced by this river; and this diversion will have serious
effect on wild life, weather and beauty of the area.
 The river and the beauty of the area attract tourists and provide clean water to the
local people and citizens of Muzaffarabad; and this diversion of water will deprive
the area of clean water and reduce the Neelum River to ‘Nalah Lahi' in
Rawalpindi which has dirty water and creates enormous problems for the citizens.
 This project, once completed will benefit Pakistan, but local people will not
benefit from it in any form or shape. There will be serious economic and
environmental consequences for the local people; and their future generations will
face very serious economic and environmental problems.

Report on Neelum Jhelum Hyrdoelectic project

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