Hongsa Power Plant 100% completed, Xayaboury Hydropower 70% Completed








Hoauy Lamphan Gnai Hydropower Project Progress by January 2014

Location and background of project

            Houay Lamphan Gnai (HLG) Hydropower project is owned by EDL and the EPC is carried out by China Gezhouba Group Co. Ltd (CGGC). The Projectis located in the Thanteng district and about 40 km west of Sekong River, flow to the northwest on the tableland of the Bolaven Plateau and make a U-turn after dropping from the northern rim of the plateau. The HLG project is designed utilize a vertical drop of some 612 m between the top and bottom of the escarpment with a relatively short waterway to the propose powerhouse site. An install capacity of 88 MW and the average annual generation capacity is 480 GWh/Yearm, the generation power supplied to Champassak, Sekong , Attapue and Saravanh province via the Southern Power grid.

 

Main Feature of Project

-        Catchment area:                                                                            237 km2

-        Reservoir:

Flood water level (FWL)                                                                820.70 masl

Full supply level (FSL)                                                                    820 masl

Minimum storage level (MOL)                                                       795 masl

Reservoir area (FSL)                                                                      6.8 Km2

-        DAM:

Type                                                                                  Clay core rock-fill Dam

Maximum dam height                                                                   75.60 m

Dam length                                                                                    557.30 m

Dam crest level                                                                              823.60 masl

Base width                                                                                    195 m

Crest width                                                                                    8 m

-        Spillway:

Crest level                                                                                      812.75 m

-        Power tunnel System

Low pressure tunnel (length/dimension)                                          2598/2.4 m

Exposed penstock (length/diameter)                                                      2134.2/2

Vertical Shaft (length/diameter)                                                      90/2.4 m

Underground penstock (length/diameter)                                         1696.5/2 m

Bifurcation (length/diameter)                                                          33.5/1.4 m

-        Power Station:

Number of Units                                                                             2

Turbine Type                                                                                  Pelton

Turbine Discharge                                                                          2x9.69m3/s

Gross head                                                                                      612.60m

Rate head                                                                                       529m

Minimum head                                                                               514.2 m

Runner diameter                                                                             2.20m

Number bucket                                                                               19                         

Jet diameter / Number of nozzle                                                      17.7 mm/ 4

-        Transmission Line:

Line length                                                                                                 9km

Voltage                                                                                         115 kV, 2 cc

Executive Summary 2013-2014

-        On January 21, 2013, Upper horizontal tunnel excavation was complete

-        On April 9, 2013 Surge shaft excavation was complete

-        On June 13, 2013 concrete lining for tunnel 5# was complete

-        On July 27, 2013, intake tower structure was complete

-        On September 9, 2013 reservoir water 2# tunnel excavation was complete

-        On January 3, 2014, reservoir water way 4# tunnel excavation was complete

-        On January 13, 2014, vertical shaft lining was complete

 

Project construction current progress

Main work                                                             Current

-        Design work                                                          0.14%

-        Metal work                                                             1.55%

-        M&E work                                                             11.80%

-        Auxililarywork                                                       0.00%

-        Main access road                                                     0.00%

-        Reservoir waterway system                                    2.50%

-        Dam                                                                       3.63%

-        Spillway                                                                 2.10%

-        Power intake                                                          0.00%

-        Upper horizontal tunnel                                          4.81%

-        Surge shaft                                                             21.30%

-       Valve chamber                                                        0.00%

-        Exposed penstock                                                   3.40%

 

 

-        Vertical shaft                                                       1.20%                               

-        Bottom horizontal tunnel                                       1.60%

-        Manifold                                                                2.83%

-        Power house                                                           1.92%

-        Operator village 115 kV transmission line                0.00%

-        HLG Substation                                                      2.00%