Order Received for Nam Ngiep 1 Hydropower Project in Laos

Civil Engineering

Obayashi Corporation (Head Office: Minato-ku, Tokyo, Japan, President: Toru Shiraishi) has been awarded a contract for civil engineering works of the Nam Ngiep 1 Hydropower Project in Laos.

The project was launched by Nam Ngiep 1 Power Co., Ltd, which consists of three sponsors: KPIC Netherlands B.V. (KPN), wholly-owned subsidiary of Kansai Electric Power Company Incorporated of Japan, EGAT International Company Limited (EGATi), subsidiary of Electricity Generating Authority of Thailand, and Lao Holding State Enterprise (LHSE), wholly-owned subsidiary of the Government of Laos. The shareholding ratio is as follows: KPN 45%, EGATi 30%, LHSE 25%.

This hydroelectric project consists of construction of concrete gravity dams and power stations on the Nam Ngiep River, a tributary of the Mekong that flows through Laos and Thailand on their border. The main dam is 148m height, 530m length at the top, and the volume of the body is approximately 2 million m³. In addition, the two power stations will be equipped with outputs of approximately 270MW and 18MW respectively. Obayashi Corporation is responsible for construction of the main dam body, power station, road, and etc.

The preparatory works for road, river diversion, excavation for the dam foundation, temporary facilities for the dam, and etc. will be executed from 2013 to 2015. Moreover, the concrete placement of the main dam body will be commenced in 2016. Power generation is scheduled to start in January 2019.




【Outline of project】

Project Name Nam Ngiep 1 Hydropower Project
Location Borikhamxay, Laos
Client Nam Ngiep1 Power Co., Ltd.
Service Construction, Design and Construction with some part of works
Construction period October 2013 to January 2019 (64 months)
Summary Main Dam (Dam height 148.0m, Dam top length 530.0m, Volume of Dam body approximately 2 million m³)
Main power station (Output 272.8MW, semi-underground type B25m×L65m×H47m)
Re-regulation Dam (Dam height 20.6m, Dam top length 252.6m, Volume of Dam body approximately 60,000 m³)
Re-regulation power station (Output 17.6MW, semi-underground type B22m×L46m×H43m)
Access road, Incidental architectural works 

【Location Map】