Presentation-Tiuni Plasu 01-10-2010

Tiuni Plasu HEP (72 MW)

PRESENTATION ON DETAILED PROJECT PRESENTATION ON DETAILED PROJECT REPORTREPORT

TOTOCENTRAL ELECTRICITY AUTHORITYCENTRAL ELECTRICITY AUTHORITY

11stst October 2010 October 2010

TIUNI-PLASU HYROELECTRIC PROJECT(72 MW)

ArakotBarrage

ArakotPower House Taluka

Rohru

Barrage

Ichari Dam

Proposed KishauDam site

Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti

Bandar PoonchGlacierE.L. 6315 m

Meenus

Atal

Shimla

DISTANCES FROM DEHRADUN

VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.

TIUNI via MEENUS 166 Km.

TIUNI via PUROLA 216 Km.

TIUNI via CHAKRATA 177 Km.

LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL

Tiuni - PlasuHEP(72 MW)

ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


ArakotBarrage


Rohru

Barrage

Ichari Dam


Kalsi

El. 597m

MussorieEl. 2003m

Mori

Chakrauta

Tiuni

Arakot

Hat Koti


Meenus

Atal

Shimla


VIKAS NAGAR 40 Km.

KALSI 57 Km.

CHAKRATA 90 Km.




LEGEND

ROAD

RIVER

HEP

BRIDGE

POWER HOUSE

SURGE TANK

TUNNEL


District Dehradun

Tehsil Tiuni

Place Tiuni

Nearest Airport/Railhead

Dehradun 216 m/166Km

Accessibility Project site is well connected by mettaled road.

Stream River Tons- a tributary of river Yamuna

PabarTons

Proposed Barrage

Longitude: 770 50’20”E to 770 51’30”E Latitude : 300 55’0’’ N to 30057’20” N Image from Google Earth

Project History• The site was initially identified by U.P. Irrigation

Department in 1971-72. A DPR was prepared by the department in 1992 and submitted to CEA, but it could not be perused by the department due to non-availability of funds.

• In 2000, the project was transferred to Uttara-khand Jal Vidyut Nigam (UJVNL). A PFR was prepared by UJVNL in Aug 2007. As per the PFR, installed capacity of the project was 66 MW.

• In Aug 2008, the project was transferred to Uttarakhand Irrigation Department. DPR has been prepared by the department and submitted to CEA for approval in Aug’2008.

Agencies involved in preparation of DPRS.NO Chapter Agency1 Hydrology Prepared by Irrigation Deptt.

and vetted by I.I.T., Roorkee.2 Civil & Hydro-mechanical

design, Power Potential Studies, Cost Estimate,

Prepared by I.I.T., Roorkee

3 Geology Geological Survey of India, Dehradun. Geological Investigations were conducted by Irrigation department as per directions of G.S.I.

4 E.I.A. Studies Entrusted to RITES,Gurgaon.Topographical Survey,Sub surface Geological investigations etc. were carried out through specialized agencies.

Layout Plan of Tiuni Plasu HEP

Salient Features of Tiuni Plasu HEPLOCATION

State UttarakhandDistrict DehradunTehsil & Place TiuniStream Tons, a tributary of river YamunaNearest Dehradun

HYDROLOGYGross Catchment Area 3320 Km2

Snowbound Area 962 Km2

Rainfed Area 2358 Km2

Max design flood for Hydraulic Design

6946 cumec

Max design flood for Structural Design

7810 cumec

Salient Features :2

DIVERSION ARRANGEMENTSLocation 200m d/s of confluence of Pabar

& Tons riverType of diversion BarrageRiver Bed Level 908 mPond Level 929.50 mHeight from foundation 29.8 mLength of barrage 138.0 mNo of bays 8 each of 15m widthType of gates RadialLive storage capacity of reservoir 0.44 MCMINTAKE ARRANGEMENTType Side Intake located on left bankDesign Discharge 181 cumec

Crest level 917.50 mDESILTING CHAMBERType Underground BasinNo. & Size 2 nos of 360m x 20m x 21mParticle size to be removed 0.15mmHEAD RACE TUNNELSize Circular of 7.60 m diameterDischarging capacity 145.0 cumecLength 1.850 KmSURGE TANKType Restricted Orifice typeDimension 35.0m dia & 28.0m deepPRESSURE SHAFTPenstock 3 no each of 4.0m deep

Salient Features :3

Length of each penstock 110 m

POWER HOUSE

Type Surface Power house

Location On left bank of river Tons near village Newal & u/s of Sukher Khad

Type of Turbines Vertical Francis

Maximum Gross Head 65.1 m

Installed Capacity 3 x 24 MW

Annual energy generated in 90% dependable year

279.20 MU

Annual energy generated in 50% dependable year

423.29 MU

Levellised Tariff Rs 3.55 per kWH

Construction Period 5 Years

Estimated Cost of Project 826.81 Crore with IDC

Salient Features :4

• Gross Catchment Area : 3320

km2

• Snowbound Catchment Area : 962

km2

• Rainfed Catchment Area : 2358

km2

•Maximum Design flood for

Hydraulic Design : 6946

cumec

Structural Design : 7810

cumec

Free Board : 12799

cumec

DATA USEDDaily & Ten daily discharge data of river Tons

from

1976 to 2007 at G&D site Tiuni (established &

maintained by CWC) just 1 Km d/s of proposed

barrage

Daily & Ten daily discharge data of river Tons at

Ichari dam observed by irrigation department

was

used for checking of consistency of data.(Ichari dam is constructed across river Tons and is

situated

about 70 Km d/s of proposed barrage ). There is no major

tributary joining in between Tiuni & Ichari.

WATER AVAILABITY• Ten daily discharge data observed at Tiuni G&D site is used for

estimating water availability.• Water availabilty in 90% dependable year (2006-07) and 50%

dependable year (1988-89) is as under:

90% dependable year 50% dependable year

Water availability 2344 MCM 3503 MCM

Max Ten Daily Discharge

256.05 cumec 255.70 cum

Min Ten Daily Discharge

24.82 cum 46.97 cum

Observed Peak Discharge 1700.56 cum (Year 1994)

DESIGN FLOOD ANALYSISDesign Flood computed from various methods is tabulated as:

Method Design Flood (Cum)

1. Empirical Approach (1 in 100 return period) 31042. Envelope Curve 124843. Frequency Approach – Gumbel Method (Upper 95% confidence level)

3254

4. Unit Hydrograph Approach using 1 day SPS:

a) CWC Guidelines 12799b) Isolated Peak Approach 6946c) Dimensionless Approach 67905. By Catchment area proportion from Dakhpathar barrage 64046. Catchment area proportion from different Himalayan Projects

6902

Summary of Probable Maximum Flood for the Project

Design flood computed from isolated peak mehod has been adopted as Probable Maximum Flood for hydraulic design

6946 Cum

Design Flood computed from area correlation of flood adopted for Dakpathar barrage for structural safety has been adopted as PMF of strutural design of the project

7810 Cum

Design Flood computed from CWC guide-lines has been adopted for design of free board

12799 Cum

Design Flood for Diversion Works

• The maximum diversion flood for 1 in 25 years frequency has been computed as 543.15 cum. The maximum observed instantaneous discharge at Tiuni in non-monsoon months from 1977 to 2007 is 558.19 cum. Therefore, according to IS:14815-2000, Design flood for diversion works is adopted as 560 cum.

Sedimentation Analysis• The daily suspended inflow data of 1986-87 to 2006-07 are

available at Ichari dam. As Ichari dam is constructed across the same river d/s of the project and no major river meet in river Tons in between these two projects, the sedimentation analysis done at Ichari dam site has been used for this project.

• Rate of Average sediment transport- 13.75 ha-m/100 km2/Year

• As the project is a run of the river scheme, the reservoir capacity is very less in comparison to the average annual inflow. As per Brune’s & Churchil’s method, trap efficieny of the reservoir tends to zero. Therefore, no siltation problem is foreseen. Moreover, sill level of intake is 8m above sill level of under sluice bay therefore silting of reservoir is not envisaged.

Power Potential Studies• Power Potential Studies have been carried out for the 90%

dependable year. In the 30% year data 90% dependable year is computed as 2006-07 with an annual discharge of 2344 MCM.

• For computation of energy in 90% dependable year the following assumptions are considered:

• Gross head available 65.1m• Environmental flow 3.3 cum• Flushing discharge 20% of design discharge• Efficiency of generator 96%, efficiency of Francis Turbine 92% and

combined efficiency 88.32%• Range of installed capacity studied 60 MW to 84 MW• Incremental energy per MW remains almost constant from 60 MW

to 72 MW and decreases sharply after 72 MW.• On the basis of incremental energy per MW and average annual

energy generation over a period of 10 years period, an installed capacity of 72 MW is adopted.

• Geology Chapter of the DPR is prepared by Geological Survey of India, Dehradun.

• The following Geological Investigations have been carried out:

• 1. Detailed Geological mapping of the area of about 1,00,000 m2 on 1:1000 scale at barrage & surface power house site.

• 2. Drill core logging of six holes aggregating to 247m length, at barrage, surge tank and power house site.

• 3. 3 ‘D’ geological mapping on 1:200 scale of four drifts aggregating to 143m length at barrage, at the

• intermediate adit and between surge tank & power house site.

• 4. Pit logging of 4 pits of 3m x 3m x 3m size aggregating to 27m2 at the barrage & powerhouse site.

• 5. Geological traverse on 1:1000 scale of the proposed desilting arrangement covering 500m & geological traverse in the reservoir area on 1:50,000 scale covering 2 Km.

• Apart from above geological investigations, Regional geology of the project area has been assessed.

Abstract of CostITEM COST

(Rs in Crore)Civil Works 481.87Electrical Works 120.00

Sub Total 601.87Escalation during Construction 88.57Interest during Construction 139.09Total Project Cost 829.53

Tariff CalculationsTariff Parameters EnergyTotal Cost of Project with IDC

829.530 Annual Energy in 50% depend year

445.57 MU

Loan 622.40 Ancillary Consumption 1%

Equity 207.13 Transformation losses 0.5%

Interest on Loan 11.25% Net salable Energy 414.82 MU

Return on Equity 16% Useful life of Project 35 Years

Loan Repayment Period

10 Years Tariff in the first Year Rs 3.97 kWh

O & M Charges 2% of Cost

Levellised Tariff Rs 3.55 per kWh

O&M Escalation Rate 5.72%

Weighted average depreciation rate

3.08%

Civil Structures of the Project• Proposed Tiuni Plasu HEP comprising the following civil

works:• 1) Diversion Barrage• 2) Intake Structure• 3) Intake Tunnel• 4) Desilting Chamber• 5) Head Race Tunnel• 6) Surge Shaft• 7) Pressure Shaft• 8) Power House• 9) Tail Race Channel

Barrage• Proposed at 200m d/s of confluence of river Pabar & Tons.• Conventional gated structure founded on RBM• Barrage is designed for the following flood discharge:

Hydraulic design 7000 cumStructural design 7810 cumFree board considerations 13000 cum

• Design of barrage has been carried out as per IS:6966 and accordingly its basic dimensions & levels work out to beTotal no of bays 8Width of each bay 15Total no of piers 7Under sluice bay 1 (on the right side)Overall Length of barrage 138m, Maximum height above foundation: 29.8m

BARRAGE

Head Race Tunnel• Design Discharge 145.0 cum• Diameter optimised using economic

considerations• Finished diameter of 7.6m Circular• Tunnel length 1.850 Km• Tunnel aligned in such a way as to optimize rock

cover • One adit is proposed

Surface Power House Complex• Surge Shaft

Circular restricted orifice 35m dia., 28m deep• Pressure Shaft

Three nos. each 4m dia, 110m long, • Power House

Surface Power HouseNo. of Turbines 3no x 24 MWType of Turbines Vertical Francis

Documents

Presentation-Tiuni Plasu 01-10-2010