Explain the priority of upgrading facilities in PLTM at the practical implementation level for weekly evaluations.
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    Lubuk Gadang Hydropower Project  Technical Query of FACILITY IMPROVEMENT    2 A.   BACKGROUND Lubuk Gadang mini hydro power plant is designated to generate 8 MW wich will be transmitted into distribution feeder under Solok substation regulation, in West Sumatera Province. It is a run-of-river scheme built on the Batang Sangir River, one of the westerly tributaries forming the headwaters of the Batang Hari catchment, the largest river basin in Sumatra. Following substantial completion of construction, the Project commenced generation in April 2014. The Project was built and is currently owned by PT Selo Kencana Energi (SKE) and now majority of shares are owned by Berkeley Energy. Several preliminary studies and quality assessments have been carried out to improve this powerplant performance. Aim to optimize the supply of discharge during the maintenance operation process. The Company is soliciting the proposal of facility improment .   B.   SCOPE OF WORK The work of scope consist of repair or improve supporting facility as mention below :    3 C.   COMMENT & SUGGESTIONS No. COMMENT SUGGESTION P1 Based on information that some of masonry were damage because of soil sliding. Please check if the weep holes are sufficient to flow ground water, then the risk of land slide can be reduced. Instead of close the ground with concrete, we need to increase the capacity of ditch on the toe side of retaining wall. P2 On the clay soil, compaction must perform correctly before concrete layer can be install above it. Based on visual check, soft clay layer can be found from 0,3 until 0,5 m below the surface. This layer should be stripped as per road geometric design than compacted properly using Vibro roller (Stoom walls). Then sub base material spreads above and compacted. Basic design shown on the next figure.    4 No. COMMENT SUGGESTION P3 Similar with my previous suggestion. Only add reinforcement bar on the concrete on the first station

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Sep 22, 2019
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