Indian Power Sector

Location: Rampur, HIMACHAL PR.

Capacity: [6 X 68.87 MW]

The project is located on river Satluj in Shimla and Kullu district of HP. The project envisage construction of

*A 15.08 m dia circular HRT terminating in surge shaft

*A 140 m high and 38 m dia surge shaft

*3 nos bifurcating into 6, partially underground penstocks, 5.40m/3.80m circular steel lined.

*Surface steel line

The project will provode 412 MW of peacking power to the northen grid and will generate 1770 Million units of electric energy in 90% dependable year.

Present status

Conc. Lining of diversion tunnel and exe. of Bael Adit with junction , Kazo adit, Goshai Adit with junction, pilot hole and drianage gallery of surge shaft, HRT Spill tunnel D/s, flood protection wall and erection of columns & beams in service bay I-II of power house completed upto June 09. Other activities are at different stages of implementation. The EM works was awarded to BHEL on Sept 08 with a execution period of 42 months.

Location: Chamoli, UTTARANCHAL

Capacity: [444 MW]

The vishnugad -Pipalkoti HEP with an installed capacity of 444mw is a run of the river scheme envisages of a 65 M high concrete diversion dam harnessing a gross head of 237M on river Alaknanda. The project located in the district Chamoli in the state of Uttarakhanda. The main benefit of the projects are

*Capacity addition of 444MW in the northen region

*Annual energy generation of 1813MU

*IntegratedDevelopment of Chamoli/Garhwal region in the areas of employment, communication, education, health, tourism, development of flora & Fauna etc

Present Status:

The project will be got executed through two separate contracts:-

i) Civil works and HM works

ii)EM work

The EPC contract for the Civil and HM works is expected to be awarded by the end of Dec.,09. The evaluation of tender documents of EM work is under progress.

Location: UTTARANCHAL

Capacity: [1000 MW]

The essntial works such as dam, intake, HRTs, transformer hall, and the various adits are already complete along with Tehri Stage-I works. Tehri PSP comprising of four reversible pump turbine units of 250 MW each, would involve construction of an underground machine hall on the left bank of river Bhagirathi. The main feature of the Project is the large variation of about 90m between the maximum and minimum head, under which the reversible units shall operate. The operation of Tehri PSP is based on the concept of recycling of water discharged between upper reservoir to lower reservoir. The Tehri Dam reservoir shall function as the upper reservoir and Koteshwar reservoir as the lower balancing reservoir. On completion, additional generating capacity of 1000 MW peaking power will be added to the Northern Region (annual generation of 1377 million units).With the construction of Tehri PSP, Tehri Hydro Complex will function as a major peaking station having an installed capacity of 2400 MW.

Essential works of Tehri PSP already completed along with the execution of Tehri Stage-I(1000 MW) are:

*Two head race tunnels for PSP,

*Intakes for HRTs of PSP,*Transformer hall constructed under Tehri Stage-I planned to accommodate generator transformers for PSP also,

*Main cable gallery, and

*Interface facility civil work.

Major works to be taken up in PSP involve construction of underground Power House cavern, Bus bar ducts and safts. Penstock assembly chamber, penstocks, upstream and downstream surge shafts, Tail race channels, TRT outlet structure and Appurtenant works. The Electro Mechanical works for Tehri PSP would be the design, supply and installation of the Power House Generation equipment, comprising reversible punp turbine sets along with auxiliaries.

Present Status: Major works have been planned for execution through a single turnkey EPC package to be invited under ICB. The bidding for EPC contract has been completed. Technocommercial & price bids were opened on 15.1.09. As L-1 price bid is more than the cost estimate of the project, revised has been prepared based on the price of L-1 bidder. The project is planned for commissioned in 54 months after award of EPC contract.

Location: J & K

Capacity: [44 MW]

The project envisages installation of 4 Units of 11MW each. The project site is located along the river Suru in Kargil district of J&K. Broad features of the project include construction of 53m high concrete gravity dam, surface Power House, and 3.3 m dia & 10.02 Km long HRT,and installation of 4 nos. of vertical Francis turbine of 40 MW each.

Present Status:

Major civil works awarded to M/s HCC on 23.09.2006. Currently, work on diversion channel excavation is in progress. Work is currently also in progress in respect of the water conduct system for the power house comprising 5.9 m dia and 4.79 km long HRT. The portal excavation in respect of adits of HRT 1, 3 5 & 6 have been completed. Excavation in respect of the ventilation tunnel leading to the power house, vertical pressure saft ( 2 nos)has since been completed. 98% HRT excavation completed till June 09. HM work awarded to M/S PES Enginners Pvt. on 28.7.08. Ist stage embedded parts of the dam arrived ar site. Design and engineering of E&M work are under progress. EOT crane has arrived at site.

Location: HIMACHAL PR.

Capacity: [520 MW]

Background

The Scope of the project comprises of the following:

1).Rockfill dam, 43m high

2).25 m dia, 7.98 km long horse-shoe shaped Head Race Tunnel

3).1 m dia, 7.2 km long Tail Race Tunnel, and

4.An underground Power House with 4 nos. Francis vertical axis turbines, and generating Units of 130 MW each

The project is to provide 3-4 hours of peaking power. It will generate 1977.23 million units in a 90% dependable year.

Present Status:

All major civil works have since been awarded to the consortium of M/s. Patel and L&T, and M/s Jagar  Gammon JV. River diversion work completed in March, 2007. Construction of Coffer dam on left and right banks, exe of HRT face 1, 5, 6, STF excava of desliting chamber and Excavation of rockfill of the dam have been completed. Adit excavation in respect of surge shaft and pressure shafts is complete. HRT excavation 82.83% completed. In PH benching upto service bay level 98.25% completed and TRT excavation 92.19% completed up to June 09., D&E works for E&M and HM components in progress.

Status as on December 2009 : Construction of Coffer dam on left and right banks, exe of HRT face 1, 5, 6, STF excavation of desliting chamber and Excavation of rockfill of the dam have been completed. Adit excavation in respect of surge shaft and pressure shafts is complete. HRT excavation 96% completed. In PH benching upto pit level completed and unit handed over for E&M work . TRT excavation completed up to Mar 10, D&E works for E&M and HM components in progress.

Location: HIMACHAL PR.

Capacity: [MW 231]

The project is a run-of-the river scheme on river Ravi in Chamba district of Himachal Pradesh. The project envisages construction of a 68 m high concrete gravity dam and an underground Power House on the right bank of the river. A gross head of 230 m is proposed to be utilized to generate 1108.17 Million Units (MU) in a 90% dependable year with an installed capacity of 3×77 MW.

Present Status: All major civil works were awarded to M/s HCC Ltd. by the contractor is currently in progress. Work on river diversion completed on 5.3.2007. HRT execavation completed. E&M works awarded to M/s Alstorm on 23.1.2007 is nearly completed. H&M work has been awarded to M/s Om Metal.

Status as on December 2009 : Design and drawing under finalisation, fabrication of pressure shaft liner under progress and erection work started and 100m erection work completed . EOT crane and draft tube have been reached at site. Erection, testing & commissioning of EOT completed on 23.08.08. The project is running smoothly as per the schedule.

Location: ARUNACHAL PR.

Capacity: [110 MW]

The project is situated in the papum Para District of Arunachal Pradesh. Neepco has taken up the project to harness the Hydropower potential of the river Dikrong which is a tributory of river Brahmaputra . The project envisages contruction of following:

Construction of a 78 high concrete gravity dam

2.811 Km long HRT having 7.50m diameter on the right bank of the river Dikrong

270 m length diversion tunnel having 8m diameter

The installed capacity of the project is 110MW and catchment area of the project is 824 Sq m with max availble design net head is 67.36m. The power from the project shall be utilised within the NE region itself using the existing 132 KV transmission system of RHEP(405MW) to meet the needs of Arunachal Pradesh, Assam and other NE Region.

Present Status: The tender activities for award of the works/contract are under progress. PPA had been signed on 24/11/06.The project is in the initial stage of implementation.

Location: TEHRI, UTTARANCHAL

Capacity: [MW 4 X 100]

The project envisages installation of 4 Units of 100 MW each. It is a run-of-the-river project, and would utilize the downstream waters of Tehri Stage-I (4×250 MW). It is an integral part of Tehri Power Complex comprising of Tehri dam & HPP (1000 MW), Tehri Pumped Storage Plant (1000 MW), and Koteshwar H. E. P (400 MW) to develop hydro-electric potential of the river Bhagirathi. The project-site is located 22 Km dowmstream of the Tehri Power Station. Main structural components of the project include construction of 97.5 M high concrete gravity dam, a surface Powerhouse, and 582 M diversion tunnel. While sanctioning the Tehri Dam and HEP Stage-I in 1994, an amount of Rs.34.36 crore was sanctioned for committed works of Koteshwar project. The project is being executed as a joint venture project of Government of India and Government of U.P. A total of Rs.325.62 crore is to be the equity (equity of Govt. of India and GOUP in the ratio of 3:1), an amount of Rs.717.2 crores loan from PFC and Rs.259.69 crore as ECB.

Present Status:

The river Bhagirathi was diverted on 28th Dec.03. Open excavation relating to the dam, stilling basin, power intake, and the powerhouse has since been completed, and concreting is in progress. The work of excavation in switchyard & TRC area is in progress. Underground excavation for penstocks & drainage galleries is in advance stage. Also, concreting in dam pit is currently in progress. Contract for design, manufacturing, and supply of electro-mechanical equipment main generating unit including auxiliaries and EOT cranes has been awarded to M/s BHEL. Supplies against E&M equipment from M/s BHEL are being received progressively at the site. 59.14% of total supplies have been received till June 09.

The project is currently delayed on account of slope failure on the right bank in Nov 05, and poor performance on the part of sub-contractor. Excavation for fright shaft on left bank and in the swith yard area have been completed. The likely date for completion of the project is Dec,2010.

Location: Arunachal Pr.

Capacity: [MWE 4X150=600]

The Kameng H.E.P., located in the West Kameng District of Arunachal Pradesh, was approved with an installed capacity of 600 MW and design head of about 500 M is targeted at firm power generation of 163.5 MW in a 90% dependable year.

There are 7 major packages under this project all the packages have since been awarded.

Package I:Bichom Dam and 1st part of Bichom & Tenga Tunnel Work awarded to M/s. Patel Engineering Ltd. Mumbai on 8.12.

Location: AIZWAL, MIZORAM

The project is to be treated as a Central Sector scheme under loan assistance from OECF Japan (equity from GOI 15%, GOI loan 8% and JBIC loan 77%). The project is located on the border of Cachar District of Assam and Aizwal Disttrict of Mizoram. The scope of the project envisages construction of a 77M high homogeneous earthfill dam across the Tuirial River. The water conductor system consists of HRT 160 M long and 6.25 M dia, tunnel (horse shoe shaped) with cut and cover portion of 50.5 M, a 3.8 M dia surface penstock of 176 M length finally bifurcating to 4.3 M dia near the powerhouse. Powerhouse will have vertical turbines operating under a head of 56 M  tail race127 joining into the main river. The installed capacity of the project is 60 MW consisting of 2 Units of 30MW each. The design energy from the project at 90% dependable year is 275 MUs per annum and the energy for sale is 240 MUs ( after free power , losses and auxiliary consumption).

The works have been divided into 5 packages:

Lot-I (Diversion Tunnel):Work order for Diversion Tunnel was issued to M/s. Patel Engineering Ltd. on 13.02.02. Open excavation and concreting has been completed.

Lot-II (Dam & Spillway):Work order for this package was also issued to M/s. Patel Engineering Ltd. on 21.10.02. The excavation works of spillway are in progress.About 79% since completed. Regarding work of the Main Dam, 16% excavation completed.

Lot-III (Powerhouse):

The package covers the civil works relating to Power House.,switchyard and waterway. LoI for these was issued to M/s. Patel Engineering Ltd. on 30.12.02.

Lot-IV (Hydro Mechanical Equipment):LoI for Lot-IV had been issued to M/s Alstomm Power Portugal S.A., New Delhi on 17.11.03 which has since gone into legal dispute following cancellation of the work order in the light of non-signing of the agreement by the firm. The case is subjudice pending final hearing of the Gauhati High Court.

Lot-V (Electrical Works):The package covers all electrical works. Work order for this package was issued to M/s. BHEL on 26.09.02. BHEL has been asked to put on hold for works relating to EM works by NEEPCO during sept 04.

Present Status:As regards progress in respect of the Tuirial hydro project, all project activities are currently abandoned because of the adverse law and order situation in the region arising out of the agitation launched by the Tuirial Crop Compensation Claimants Association (TCCA) for higher compensation for their crop likely to be affected by the project after commencement of work on the project. The agitation was called off conditionally in August, 2004. Moreover, cancellation of the award of hydromechanical package to M/s Alstom Power , Portugal on account of non-signing of the agreement by the said firm has led to wrangling with the firm approaching the Hon’ble Guwahati High Court for action against NEEPCO. The case is still subjudice pending final hearing in the matter in the said court. The package will be re-awarded after the court verdict in this regard. All the construction work has been kept suspended since 09.06.2004.

All project activities are currently halted because of the ongoing agitation launched by the Turial Corp., Compensation affected by the project. The issue has been discussed in series of meetings taken by Secretary (Power) in the past. Govt. of Mizoram has agreed for 12% free power. They have agreed to buy entire power @ Rs.3.30-3.50 per unit. Revised estimate has been submitted to MOP.In response to the Govt of Mizoram to provide a special grant of Rs 134 crore for revival of project, the secretary DONER has informed on 16.5.08 to Govt of Mizoram that DONER do not have any provision for providing such grant and suggested to take up the matter with planning commission. The revised estimates at Rs 802.79crore(including IDC) at Jan 08 PL vetted by CEA. The PIB note has also been sunmitted to MOP on 16.2.09. JICA has been terminated on 10th June 09. All outstanding loan has been repaid on 11.08.09. Option for execution of the project through a joint venture company between Govt of Mizoram and NEEPCO is under consideration. all necessary efforts has been taken by NEEPCO for early revival of the project.