12. Conclusions & Recommendations
To assist «Region Oil» in acquiring concession for construction of the Se Kong 5
project, HPEC reviewed design documents of past time furnished by «Region Oil»
(ref to Appendix 1), conducted preliminary inspection of the Project site and has prepared
DDS with due account for the above documents and recommends as follows:
1. The following should be taken into account in taking decision on the SE Kong
5 concession:
1.1. This DDS is a preliminary document to be presented to the potential investors
and other concerned parties to take decision on participation in financing and clearing
of the Se Kong 5 project
1.2. The available hydrological data on the Se Kong run off and water management
studies made by HPEC allow for assessing the water/ power parameters of HEP
given in Table 12.1.
Table 12.1
Alternative
Parameters
Unit of
measurement В116 В16
1. Daily mode of HEP operation *) hr/day 16 6
2.Installed capacity MW 190 400
3.Long-term average energy GWh 1131 1299
4.Primary ( dependable) energy GWh 1012 1012
4.Losses in station services and in distribution networks
% 2,5 2,5
5.Sale of electric energy to end users considered in
analysis of financial viability:
Total GWh 1103 1267
Including
prime ( dependable) energy
GWh 987 987
secondary ( seasonal) energy GWh 116 280
*) – since at present it is not possible to define the pattern of electric energy export to Thailand two alternative
modes of HEP operation are considered under the daily load curve: 6 and 16 hr zones.
1.3.The geological information available in the previous design document is of a
limited nature. But these data, and results of reconnaissance conducted by HPEC
during preparation of DDS as well as findings of remote sounding based on space surSe
Kong 5 HEP
Page 116
Due Diligence Studies
vey allow the conclusion to be made that there are serious contra-indications for construction
of the Se Kong5 project.
1.4. The Project layout recommended at the DDS stage with a 198 m high concrete
gravity dam impounding an overyear reservoir with full capacity of 3.98 км3, is a
conventional solution based on its comparison with CFRD alternative ( for list of structures
and their parameters see 5.1). In preparation of DPR consideration may also be
given to an arch dam, if findings of geological investigations confirm the presence of favorable
geological environ for its setting which would reduce the cost of the project.
1.5. Preliminary assessment of potential environmental implications of the Se
Kong 5 dam project made at the DDS stage indicates that construction of the dam and
impoundment of the reservoir will not entail restructuring of terrestrial and aquatic ecosystems
and there are no obstacles for further promotion of the project.
1.6. The cost of the project was estimated proceeding from quantities of work on
the main project structure and unit rates for major construction activities, structural steel
and mechanical equipment taken following review of the design documents for planned
and on going dam projects in Laos and Vietnam ( Ref to Appendix 4) and requires updated
at the DPR stage. Cost of the Se Kong 5 project is given in table 12.2.