DORDI KHOLA HYDROPOWER PROJECT. Lamjung, Nepal. Monthly Progress Report. June 2018

Transcription

1 DORDI KHOLA HYDROPOWER PROJECT Lamjung, Nepal Monthly Progress Report June Himalayan Power Partner Limited Energy Sector Research, Development & Consulting Services PO Box # 12538, Kathmandu, Nepal Tel: Fax hpphydro@gmail.comurl:

2 1 Introduction Dordi Khola Hydropower Project developed by Himalayan Power Partner Ltd. (HPPL) Kathmandu, Nepal is a Run-of-River type hydroelectric project with generating capacity of 27 MW in Lamjung. 2 Project Schedule The RCOD of the project has been fixed on 31 st August 2019 with NEA as the evacuation point, the Udipur Hub, of NEA Grid will be commissioned only by August The construction works have been scheduled to complete by December 2018 and accordingly the project commissioning target has been fixed on 22 March The contingency plan to evacuate the generated power is in process with NEA for different options. The construction schedule is depicted in figure Project Features Gross Head : m Design Discharge : m3/sec Installed Capacity : 27.0 MW Total Annual Energy : GWh Total Annual Contract Energy : GWh Dry Season Energy : GWh Wet Season Energy : GWh Power Purchase Agreement (PPA) Rate : o Dry Season Energy : 8.40/unit o Wet Season Energy : 4.80/unit Water Ways Closed Conduit/Steel pipe ( 2.65m) Headrace Tunnel ( 3.3m) Penstock Pipe ( 2.3m) Tailrace : 3237 m : 2662 m : 700 m : 330 m Powerhouse Type : Surface Turbine Type : Horiz. Francis (3x9 MW) Grid Connection Point : Udipur Hub/ Lamjung Transmission Line : 132 kv Single Circuit Length : 1.2 km Monthly Progress Report 2

3 Figure 2.1: Project Construction Schedule Monthly Progress Report 3

4 4 Progress 4.1 Financial Progress Facility agreement to provide Term Loan of amount NPR 3,170 million, 75% of total project cost NPR 4,235 million, for construction of the project and working capital of amount 99 million was concluded with Bank Consortium led by Prime Commercial Bank Ltd. on 7 November Financial progress up to June 14, 2018 (End of Jestha 2075) including mobilization advance to the contractors, IDC and bank commissions is NRs. 2,067 million (48.80%) HPPL has completed the process of IPO after allotting equity shares worth NPR million (30% of equity capital NPR 1, 065 million) to general public including project effected area people and company employees in Shrawan The public shares of HPPL have been listed in Nepal Stock Exchange & being trading in Secondary Market. 4.2 Physical Progress Physical Progress of major construction contract packages and their status up to June 2018 are given in the following table: S.N. Name of Contract Contractor/Supplier Award date 1 Preparatory Works: 1.1 Service Road & Bridge Rasuwa Construction Company Pvt. Ltd. 1.2 Construction of camp & REX Prefab & Facilities Construction Pvt. Ltd. 2 Civil Works 2.1 Surface Civil Works Rasuwa Construction Company Pvt. Ltd. 2.2 Underground civil Works (Tunnel & Surge Shaft) 3 Hydro-mechanical Works 3.1 Steel procurement/supply 3.2 Fabrication & Installation 4 Electro-mechanical Works 5 Power Evacuation/ Transmission Line 132 kv 6 Environmental & Land acquisition works Multi Infra Structure Development Co. Pvt. Ltd. March 28, 2014 March 17, 2015 February 03, 2015 January 29, 2015 Jindal Steel Ltd. India May 06, 2015 Machhapuchhre Metal February and Machinery Works 03, 2015 Pvt. Ltd. Voith Hydro Pvt. Ltd. India April 10, 2015 Completion date Physical Progress % July 15, July 15, June 30, 2018 December 31, 2018 May 23, 2017 June 30, 2018 March 15, Overall Physical Progress Up to June Up to date progress of all the surface civil construction works in respect to the components are explained below: Monthly Progress Report 4

5 Surface Civil Works/ Rasuwa Construction Co. The construction of civil surface works including hydro-mechanical works of the project, which includes the construction of headworks, desilting basin, water conductor pipe, penstock pipe, powerhouse, tailrace and switchyard and all related hydro-mechanical works, was awarded to MS Rasuwa Construction Company Pvt. Ltd. in February Considering the necessity of smooth coordination between civil and hydro-mechanical works, the HM works were included in contract package II along with civil works. The prime contractor Rasuwa Construction Company Pvt. Ltd. has appointed Machhapuchhre Metal and Machinery Works (3MW) as nominated subcontractor, which is doing all the hydro-mechanical works of the project. Further, the civil works of penstock pipe alignment and water conductor pipe alignment have been extracted from the prime contractor and awarded to Machhapuchhre Engineering Pvt. Ltd. (MEPL), a sister company of 3MW, for better coordination in interfacing works and to achieve the scheduled progress. Diversion Weir, Intake and Feeder Pipe Intake structure including embedment parts, under sluice portion of diversion weir, apron slab, right bank shear wall etc. are completed. Spill weir portion and left bank shear wall was under construction and due to the flood, the construction works on the river structures have stopped. Out of 9 blocks, the block no. 7 has not yet been started and the blocks 4. & 5 are partially completed. At the upstream face of block no. 4 & 5, the weir portion has been raised up to the height of 2.4 m (El m) from the apron slab. The crest level of the weir is m. The civil works of the intake structure is already completed. However, the bell mouth (Transition from intake to feeder pipe) could have constructed along with feeder pipe installation works with its associated civil works, but due to the possibility of access road blockage to the desilting basin and WCP, this part is still scheduled for next season. The possible parts of feeder pipe installation (about 50 m) with civil works are done. Construction works at diversion weir Feeder Pipe Monthly Progress Report 5

6 Desilting Basin As the civil works of weir has stopped due to flood, all the team moved to commence the works at desilting basin. The desilting basin structure was not kept in priority earlier because since it was not in critical path and can be done in wet season too. Now, the concreting works of shear walls are going on very smoothly. The shear wall concreting of block two of two bays is going on after completing the first block. Water Conductor Pipe & Penstock Pipe Alignment and Valve house Construction Works at Desilting Basin The excavation of the trench for the buried WCP is being continued by the nominated subcontractor Machhapuchhre Engineering Pvt. Ltd. (MEPL), a sister company of 3MW. About 550 m of WCP has been installed till date. However, excavation works have been stopped due to almost daily raining and seepage problems. Only at the rock area stretch of the alignment, the excavation work can be conducted. But, due to difficulty in the access up to the rocky portion Installation of WCP and Concrete casing at crossing area, still no excavation has been carried out. The WCP pipes are concrete cased at different stretches where required such as at river crossing, road crossing and at some bends etc. At the penstock alignment, MEPL has completed first stage concreting of anchor blocks AB-2 and AB-3 and bend fitting works are going on. Anchor blocks AB-5 and AB-6 are completed with pipe fitting and second stage concreting. The penstock pipe between AB-5 and AB-6 has been completed. The trench excavation and laying of penstock pipes are going on between anchor blocks 4 & 5. Penstock Pipe and bend Monthly Progress Report 6

7 The construction of valve house which is situated immediate after the tunnel outlet and beginning of the penstock pipe shall be started only after completion of tunneling works. Power House The machine foundation concreting works up to the machine floor level has already completed for all the three units with first stage EM embedment parts. The deck wall, tail pool concreting has been completed up to the level m. The tail pool slab has been concreted for all three units. Similarly, the shear walls around the powerhouse has raised up to the level m. One lift concreting of 2.4m at the deck wall of unit three has been completed and shear wall of unit three is being raised one lift of 2.4m. As the river discharge at the Marsyangdi river is increasing, the seepage is increasing, however continuous dewatering is conducting. The thrust block of the branching penstock pipe for all three units have completed with installation of reducer and bend pipe. For the smooth flow of flood discharge, Marsyangdi river has been widened by removing partially the coffer dam materials, by blasting the big boulders situated at the middle of the river, which are disturbing for smooth river flow. The embankments have been raised above the flood flow level too. Underground Civil Works/Tunnel The excavation works in the tunnel from both inlet and outlet sides is continuing normally as the rockmass quality is improving. Total progress achieved up to the end of June 2018 is 1440 m. Excavation from Inlet The rockmass condition at the face of tunnel is improving gradually and started full face blasting. From the mid of June, a nieche excavation at the chainage CH 0+375m was started. After completion of nieche excavation, the tunnel face blasts are usually going on twice per day. The excavation progress achieved till the end of June 2018 is up to CH m. A robotic shotcrete machine has also deployed by MID and will be used soon which makes quality shotcrete and shortens the tunnel cycle too. Excavation from Outlet Powerhouse construction works The geology of the tunnel face is now improving and advancing of the tunnel is going on with full face blasts with rib supports. The spacing of the ribs are increased. Frequent two blasts per day are performing. The excavation progress achieved till the end of June 2018 is up to CH m. Monthly Progress Report 7

8 HRT Faces Inlet (Explosive charging) and Outlet Robotic Shotcrete Machine delivered at site by MID Hydro-Mechanical Works The hydro-mechanical works of contract package II is being conducted by the nominated subcontractor Machhapuchhre Metal and Machinery Works Pvt. Ltd. (3MW). 3MW has already installed the embedded metallic parts along with gate/stoplog frames at undersluice, Intake, Desilting Basin and Draft Tube at powerhouse. As per the progress in civil works along the water conductor pipe alignment, the installation of WCP is going on since the required pipes have sufficiently already fabricated. About 550 m WCP has been installed. The reducers with bends for all the three units of the powerhouse have been installed. The anchor block penstock bends are all fabricated and already installed at AB-02, AB-03, AB 05 and AB 06. The laying of pipes is Monthly Progress Report 8

9 completed between AB-06 & AB-05 and laying is going on in other places. The trifurcation manifold is being fabricated at the workshop. Installation of Penstock AB6 and WCP Electro-Mechanical Works The electro-mechanical works including supply and installation of equipment was awarded to Voith Hydro Private Ltd. under the contract package IV. Voith has already delivered three units of generator sets, LAVT, NGT panels, EOT and HOT cranes at site. Generator transformers, MIV, turbine, PPV, Spiral Casing, switchyard equipment etc. have already been dispatched and waiting for custom clearance at the India border side. Various equipment are in the progress of crossing the Indian border through Birgunj Vansar. Because of the lagging in civil works progress, the equipment dispatched/ delivered are being stored at the Army yard at Udipur near the powerhouse area. As per the extended RCOD, a revised construction schedule has been prepared and sent to Voith for rescheduling of their service/installation program. Transmission Line/Power Evacuation Testing of Generator Transformer Grid connection agreement with Nepal Electricity Authority was concluded to evacuate the generated power in proposed Udipur Hub by 1.2 km 132 kv single circuit Transmission Line. Construction of Udipur Hub and transmission line along the Marsyangdi Corridor by NEA, is delayed and expected to be completed by Subsequently RCOD has been extended up to 31 st August Monthly Progress Report 9

10 5 Environmental Mitigation, Social Support and Land Acquisition o Environmental mitigation o Geo-environmental Unit in the project site has been already established to address environmental mitigation works. Bio-engineering and slope stability works are going on along water conductor/service road alignment. Bio-engineering Works Along WCP alignment o Social support Social support to local communities in project affected areas such as construction/ improvement of local roads, drinking water schemes, support to community schools etc. are going on under this heading. Bal Bikash Ni.Ma.Bi. School Building at Ramchowk Besi built with the support of the project Drinking Water Storage and Distribution Tank built with the support of the project at Syaut. Monthly Progress Report 10

11 o Land acquisition Acquisition of private land for headworks, water conductor pipe alignment, penstock pipe and power house almost completed. Ownership tittle of 205 ropani land has been transferred to HPPL. o Government Approval for tree felling and use of forest land Approval for tree cutting and use of forest land for construction of surge shaft was granted on April The required trees lying along the penstock alignment and surge shaft area have been felled down and, in the process, handing over to the concerned agency. 6 Events Site Visit by Board of Directors At the end of June, a board member team along with the chairman of the company has visited the site and observed the on-going site works at all the component structures; headworks, powerhouse, WCP, Penstock and Tunnel. The board members have encouraged the working teams with appreciations and also suggested to complete the project within the stipulated time. Board Member visit on 30 th Tunnel face from inlet Monthly Progress Report 11