Houay Lamphan Lower Dam Hydropower project by Hobo Maps - Go to Hydropower Page --- Home

Houay Lamphan is pronounced as "Houay Lampan".

Houay Lamphan Lower (Downstream) dam and reservoir is located downstream from the Houay Lamphan Gnai hydropower project on Houay Lamphan (river) near Muang Lamam, Lamam District, Sekong province, southern Lao PDR. The project is about 10 km southwest of Sekong town as shown on the satellite images below.

Houay Lamphan Gnai HPP is not related to Houay Lamphan Lower HPP.

Houay Lamphan Lower Dam image below with penstock and powerhouse in lower right area.

The 15 MW Houay Lamphan Lower (Downstream) hydropower project developer was China Gezhouba Group Co. Ltd. (Gezhouba), a subsidiary of EnergyChina, pursuant to an engineering, procurement and construction (EPC) contract dated 22 January 2016.

The reservoir was officially impounded on September 3, 2020 and the project was completed in August 2021 at which time Gezouba began operating the project during a one year warranty period.

It seems that EDL GEN has a 60% ownership interest in the project with VASE holding 40%.

The project has a capacity of 15 MW from two 7.5 MW generator units with annual output of up to 68 GWh.

Project cost is about $ 45 million USD.

The project has a temporary coffer dam, homogeneous earth dam, spillway, rockfill dam, penstock, powerhouse and tailrace.

The project main buildings are situated at about 202 meters above sea level.

The dam structure is 55 meters high and 523 meters long.

Houay Lamphan Lower dam and reservoir shown below at coordinates 15°19'17.6"N 106°37'46.6"E (15.321542, 106.629617).

The project has a watershed drainage area of 380 square kilometers.

The reservoir has capacity of 73.9 million cubic meters (or maybe 471 mcm which covers an area of 39 square km at FSL)

The normal storage surface level of the project reservoir is at 198 meters above mean sea level.

Penstock is 150 meters long with a diameter of 2.3 meters

The head is 51.4 meters. The water flow rate is 19.5 cubic meters per second.

Houay Lamphan Lower (Downstream) rotor image below during installation:

Houay Lamphan Lower project image below:

It seems that Electricite du Laos (EDL) has been directing the project and has issued the Taking Over Certificate shown in the image below. On August 19, 2021 the Ministry of Energy and Mineral Resources of Laos issued the Taking Over Certificate to fully accept the project.

Houay Lamphan Lower Dam location is seen at middle of the Southern Laos map below: