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TOPIC :Tarbella DamProject Group members:Saad khattak
2120-fet/bsee/f13Hamidullah khan 2119-fet/bsee/f13Syed Shamsheer
Haider 2117-fet/bsee/f13Umair-ur-rehman 2116-fet/bsee/f13Muhammad
Usman 2124-fet/bsee/f13
Project life cyclePre Phase
Initiation phaseDesign & DevelopmentPhase
Conclusion
Operation phase
Pre-PhaseEnergy crisis
Strengthen agriculture system
Regulate the flow of Indus river to avoid flood.
Indus Basin settlement Plan
On april 1948,India cutoff supply of water from three rivers
Ravi,Satlaj & Beas.
It causes a setback to our national economy and disrupted
Pakistan water resourses development plan.To overcome this
situation Indus water treaty(IWT) was signed on 19 September
1960.
Indus Basin Project was developed under IWT.
Indus Basin Project had two subprojects on Jhelum(Mangla) and
Indus(Tarbella).
Initiation PhaseStakeholders were Government of Pakistan and the
people of Pakistan.Environment and climateIn lower Indus plan , the
temperature is 14-20 degree in winter and 42-44 degree in
summer.Average rain fall in Indus plain is about 23cm.In lower
Indus areas receives about 9cm of average rainfall
annually.Location of Tarbella Dam is such that about 90% of annual
river is derived from snowmelt.
Internal Constraints Provential GovernmentCentral Government
External ConstraintsIndus Water Treaty(IWT):
Affected FamiliesAbout 135 villages were effected.It resulted in
displacement of population of about 9,6000 people.Land acquisition
and a cash compensation of RS.469.65 million allotted to effected
families.
Design & Development PhaseDesign characteristics of Tarbella
were evolved on the basis of site investigation area over the
period 1955-62.Searching the site for Dam was the responsibility of
WAPDA, which stated site investigation.It took 3 years of thorough
investigation to select site.Sites Investigated Three sites were
chosen namely:Bara with Potential storage capacity of 13.7bcm.Kiara
with potential storage capacity of 12.3bcm.Kirpalian with potential
storage capacity of 5.3bcm.Final site chosen was Bara.
Studies indicated that Bara had more favorable geology.Bara
would result in less expensive project.Contractor of
projectsTarbella dam project was built by Tarbella dam project
venture , which was led by Italian contractor Impregilo.The joint
venture consist of 3 Italians and 3 French Civil Engineers.
Five German and 2 Swiss companies joined them in 1969.
Chief Engr. Mr. SS Kerman was entrusted with responsibility of
evaluating technical aspects of design on behalf of WAPDA.
Estimated Hydropower potential was 2100MW.
Cost ManagementAn estimate of financial requirement of Tarbella
dam project according to Lieftinck report were 1047.3 million
dollars including land resettlement and first eight power units of
175MW each.This also include 150.5 million$ for import duties but
excluded interests during construction.Correspondingly estimated
financial requirement excluding Mechanical and Electrical power ,
but including Civil Engineering work for eight power units was 99.6
million $.
DurationCapital Cost US$Up to June 6551 million65-663
million66-6755 million67-68140million68-69618 million69-70983
million70-711191 million71-721159 million72-73394 million73-74612
million74-75497 million75-76334 million
To meet capital cost balance of $354 million were transferred
from Indus Basin development fund to create Tarbella development
fund(TDF).
TDF had a capital base of $ 989 million with commitment from
Govt. of Pakistan.
Resources of Tarbella development fund.
CountriesFunds( million $)Australia
1Canada14France30Germany16Italy56UK51USA60World Bank71Saudi
Arabia59Kuwait18Abu Dhabi25Pakistan697Others25
Conclusion
Predicted and actual Impacts:Power House Power UnitsPlanned
Actual(MW)Tunnel 14*175=700MW700MW(1977-78)Tunnel
24*175=700MW1050MW(1982-85)Tunnel 34*175=700MW1728MW(1992-93)Total
Installed Capacity2100MW3478MW
Predicted and actual Impacts:Schedule Construction StagesProject
Component ActivitiesScheduledActualMobilizationIncluding award of
main contractJun1967- Dec1969May1968-Dec 70Stage 1River
diversionJan 1968-Sep 70May 68-Sep 70Stage 2Spillways, TunnelsOct
70-Sep 73 Oct 70-Sep 73Stage 3Auxiliary Dam & Power StationOct
73 Sep 74Sep 73-Sep 74Flow through TunnelStage 4Unit 1 & 2Jan
75 Mar 75April 77-may 77Commissioning of PowerUnit 3 & 4Oct 75
Mar 76Jun 77 July 77
Operation PhaseDue to high demand of Electricity instead of
making new projects , the Govt. of Pakistan started to upgrade the
existing projects.In Sep 2013 , WAPDA signed RS:26.053 billion
contract with Chinese firm Sino hydro for executing Civil works on
the 1410MW Tarbella extension project.Work on the Project will be
completed in 3 &1/2 years at an estimated cost of $928
million.In June 2013 , The World Bank has agreed to provide a $840
million loan for project.
On completion , the project will increase generation capacity
from 3478MW to 4888 MW.Prime Minister Nawaz Sharif ordered WAPDA to
increase the feasibility study of Tarbella.Next extension would
increase additional generation of 1320MW electricity and increase
overall capacity to 6208MW.The Australian Govt. has shown its keen
interest to finance this latest extension.
Thank You
