DORDI KHOLA HYDROPOWER PROJECT. Lamjung, Nepal. Progress Report. August 2018

Transcription

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

2 Table of Contents 1 Introduction Development Milestones Project Features Project Construction Schedule Organization Chart Progress Financial Progress Physical Progress Infrastructure Works Surface Civil Works/ Rasuwa Construction Co Underground Civil Works/Tunnel/ Multi Infrastructure Development Pvt. Ltd Hydro-Mechanical Works/ Machhapuchhre Metal & Machinery Works Pvt. Ltd Electro-Mechanical Works/ Voith Hydro Environmental & Social Support Environmental Works Social support Monthly Progress Report i

3 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 Development Milestones Survey License Issued : 26 May 2005 Feasibility Study Completed : December 2012 Grid Connection Agreement : 7 July 2010 IEE Approved : 4 October 2010 Generation License Obtained : 7 July 2011 PPA Signed : 15 June 2012 Detailed Project Report Completed : August 2013 Facility Agreement Signed : 7 November 2013 Construction Works Started : April 2014 Required Commercial Operation Date (RCOD) : 31 August 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 : Dry Season Energy : 8.40/unit Wet Season Energy : 4.80/unit Water Ways Closed Conduit/Steel pipe ( 2.65m) : 3237 m Headrace Tunnel ( 3.3m) : 2662 m Penstock Pipe ( 2.3m) : 700 m Tailrace : 330 m Powerhouse Type : Surface Turbine Type : Francis (3x9 MW) Grid Connection Point : Udipur Hub/ Lamjung Transmission Line : 132 kv Single Circuit Length : 1.2 km Monthly Progress Report 1

4 4 Project Construction Schedule Monthly Progress Report 2

5 5 Organization Chart Monthly Progress Report 3

6 6 Progress 6.1 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 August 16, 2018 (End of Shrawan 2075) including mobilization advance to the contractors, IDC and bank commissions is presented in the following table: Financial Progress Project Cost, SN Expense/Funding Categories 000 NPR Amount, % 000 NPR 1 Project Development Cost/Pre-construction 102, , Engineering, Administration and Management 175, , Preparatory Works 110,250 86, Civil Works 2,109, , Hydro-mechanical Works 481, , Electro-mechanical Equipment 599, , Transmission Line/Power Evacuation 63,741 2, Environmental Mitigation, Social Support and Land Acquisition 81,490 68, IDC, Bank Commission & Fee 511, , Total 4,235,417 2,194, 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. 6.2 Physical Progress Physical Progress of major construction works up to August 2018 are given in the following table: Item No. Description Weightage % Item Progress % Weighted Progress % A Infrastructure Works A1 Land Acquisition & Tree Felling A2 Camp, Access road & Bridge) Total Preparatory Works 98 B Civil Works B1 Weir & Intake B2 Desilting Basin B3 Water Conductor Pipe B4 Headrace Tunnel B5 Surge Shaft B6 Valve house & Penstock B7 Powerhouse B8 Tailrace Total Civil Works Monthly Progress Report 4

7 Progress in % Dordi Khola HEP (27 MW), Lamjung C Hydro-mechanical works C1 Steel procurement C2 Fabrication C3 Installation HM Total D Electro-mechanical Works D1 Design/Production/Supply D2 Installation Total EM Progress E Transmission Line/Construction Power Total Overall Progress Till August % 80% 60% 40% 20% 0% 98% 72.74% 68% 70.33% 10% 71.49% Major Works Physical Progress of all components are explained below: Infrastructure Works Land Acquisition & Tree Felling o o Land acquisition Acquisition of private land for headworks, water conductor (pipe line), penstock pipe and power house almost completed. 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 process for tree cutting for surge shaft is underway. Construction of Access Roads & Bridge/ Rasuwa Construction Co. Before awarding the major civil works of the project, preparatory works/ infrastructure works such as construction of access/ link roads to the project component sites, construction of an RCC Monthly Progress Report 5

8 bridge on Dordi Khola at upstream of the weir site etc. was conducted by Rasuwa Construction Company Pvt. Ltd. Bridge at the headworks site Access road to the powerhouse Access road to the Inlet portal Construction of Camps/Rex Prefab & Construction Pvt. Ltd. Construction of camps, staff quarters, office, guest house etc. was conducted by REX Prefab & Construction Pvt. Ltd. at headworks site and the powerhouse site of the project. Staff quarter, Lab & Office at Headworks Site Monthly Progress Report 6

9 Office and Guest House at Powerhouse Site 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 interface coordination between civil and hydro-mechanical works, the HM works were included in civil contract package. The prime contractor Rasuwa Construction Company Pvt. Ltd. has appointed Machhapuchhre Metal and Machinery Works (3MW) as nominated subcontractor for all the hydro-mechanical works and Machhapuchhre Engineering Pvt. Ltd. (MEPL) for civil works of penstock and water conductor pipe alignment. 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 block no. 4 and left bank shear wall is under construction. The construction works of Weir has been stopped due to monsoon flood. From D/S & U/S view of Weir, Intake Monthly Progress Report 7

10 Desilting Basin Back view of intake and upstream bank protection The construction of first three panels from base part to the top of shear wall has completed. Top lift of river side shear wall of the fourth panel is being constructed. In the parallel, the inlet transition plum concreting is going on. The construction of head pond will be started soon. Construction Works at Desilting Basin Water Conductor Pipe & Penstock Pipe Alignment and Valve house Civil works associated with the laying of Water Conductor & Penstock Pipes is being executed by the nominated sub-contractor Machhapuchhre Engineering Pvt. Ltd. (MEPL), a sister company of 3MW. About 550 m of WCP has been installed till date. However, more about 120mtrench excavation in rocky area has been completed. The WCP pipes are concrete cased at different stretches where required such as at river crossing, road crossing etc. WCP Laying and Trench excavation at rocky area of WCP Monthly Progress Report 8

11 At the penstock alignment, MEPL has completed first stage concreting of anchor blocks AB-2 and AB-3. Anchor blocks AB-5 and AB-6 are completed with pipe fitting, second stage concreting, installation of connecting pipes and back filling have been completed. As the road crosses through the Anchor block -4, the construction work has not started yet. 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 Anchor blocks concreting AB-2, AB-6 & AB-3 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 Powerhouse construction works has been completed up to the level m. The deck wall of the unit three has been raised up to m. Similarly, the shear walls around the powerhouse is raising up to the level m; the rebar placement and form works have been completed. The first stage concreting of thrust block of the branching penstock pipe for all three units is completed with the installation of pipes. As the seepage in to the powerhouse area from the hill side and river has increased and could not be dewatered even using more pumps, the construction work has been stopped till the seepage and river discharge will lower down. Monthly Progress Report 9

12 Tailrace The tail pool works for all three units has been completed and no work has been conducted in this month Underground Civil Works/Tunnel/ Multi Infrastructure Development Pvt. Ltd Since the progress of tunnel works was very slow, the prime Contractor Eco Infra Builders Pvt. Ltd. has been relieved from the contract on amicable basis. The nominated sub-contractor MID for the tunneling works at inlet has been entrusted for the further continuation and completion of the remaining tunneling works from outlet side also. MID has started excavation works of the tunnel from both inlet and outlet side from May Excavation from Inlet Multi Infrastructure Development Pvt. Ltd. had taken over the tunneling works from Eco Infra Builders Pvt. Ltd. for rectification of collapsed portion from the chainage 0+190m. As the investigation result did not recommend for another alternative alignment and did not show the better condition even around the periphery area for about next 250m, the excavation process was going on with consolidation grouting of tunnel face & periphery and then drilling and blasting for heading and benching following the original alignment. After facing severe difficulties MID was succeeded to rectify the collapsed and loose rock portion and could proceed forward. As the rock mass condition was improving after Ch , additional equipment such as drilling boomer and Rotech shotcrete sprayer was mobilized to achieve faster progress. After encountering the improved rock mass at tunnel face, significant progress has been achieving since spot rock bolts and shotcrete are being used instead of ribs as support. The excavation progress achieved till the end of August, 2018 is up to CH m. Face of Inlet CH 0+575m & 0+580m Monthly Progress Report 10

13 Excavation Length in m Dordi Khola HEP (27 MW), Lamjung Excavation from Outlet The geology of the tunnel face is still not so favorable and advancing of the tunnel is going on with rib supports and spieling at the crown. However, frequent two blasts per day were performing even with heading benching method. As the rockmass properties are improving, the tunnel team has already started full face blasting. The excavation progress achieved till the end of August 2018 is up to CH m. Surge Shaft Tunneling Works at Outlet Side Excavation of surge shaft was halted due to delay in approval of tree felling from Government of Nepal, Ministry of Forest & Soil Conservation. Government granted approval on April But the tree cutting was completed on July 2018 after clearance from Community Users Group and final marking/taacha for cutting trees from District Forest Office in June Excavation of the surge shaft shall be started just after monsoon in October Tunnel Excavation Progress till end of August From Inlet From Outlet Total Length Achieved Monthly Progress Report 11

14 6.2.4 Hydro-Mechanical Works/ Machhapuchhre Metal & Machinery Works Pvt. Ltd The hydro-mechanical works of contract package II is being undertaken 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. Fabrication of water conductor pipes almost completed. Installation of 550 m WCP pipe and 210m penstock pipes has been completed. The fabrication of trifurcation manifold has completed at the workshop in Pokhara and will be delivered to the site soon. Installation of Penstock AB6 and WCP Electro-Mechanical Works/ Voith Hydro 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, E&M Equipment lying and loading at India border MIV, turbine, PPV, Spiral Casing, switchyard equipment etc. have already been dispatched and waiting for custom clearance at the India border side. Various equipment is in the progress of crossing the Indian border through Birgunj Custom. 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. Monthly Progress Report 12

15 6.2.6 Transmission Line/Power Evacuation 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 Environmental & Social Support 7.1 Environmental Works o o Geo-environmental Unit Geo-environmental unit in the project site has been already established to address environmental mitigation works. Mitigation Works Bio-engineering and slope stability works are going on along water conductor/service road alignment. 7.2 Social support Bio-engineering Works Along WCP alignment Social support to local communities in project affected areas such as construction/ improvement of local roads, drinking water schemes, support to community schools, rural electrification 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 13