Houay Yoi Hydropower Info by Hobo Maps - Go to Hydropower Projects Page - - - Home

In June 2022 while updating our Tad Chiad hydropower web page we discovered another hydropower project nearby under construction in the satellite images.

We have info from a 2016 Ministry of Energy and Mines report that the project may be called the Houay Yoi - H. Kod hydropower project.

This 2016 report rates the Houay Yoi hydropower project at 11.2 MW capacity with 56 GWh annual output potential (seems a bit high).

A 2020 JICA report verifies the 11.2 MW capacity and describes it as a Run of River project.

In 2024 we have no idea who the project owners and developers are.

The Houay Yoi powerhouse coordinates are 15°12'15.6"N 106°04'32.9"E (15.204339, 106.075800) in the satellite image below. This image also shows portions of the Tad Chiad hydropower project in the same area.

The powerhouse for the Houay Yoi project is only 200 meters north of the Tad Chiad powerhouse and both seem to discharge their tailrace water into the Vang Ngao river.

Our best guess is that the new project may divert water away from the Houay Yoi stream at the top of the Tad Yoi waterfall into a diversion channel that runs about 1.2 km down to a new penstock which carries the water about 400 meters to the powerhouse with a blue roof.

As a result of this diversion, the waterfall would have reduced flows most of the year.

Tad Yoi waterfall image below:

Houay Yoi (Tad Yoi) hydropower project is located next to the Tad Chiad project as seen in mid-left part of Southern Laos map below between Pakse and Pak Song: