Storage dam
Ubol Ratana Dam
เขื่อนอุบลรัตน์
Ubol Ratana Dam is a storage dam on the Phong River in Ubolratana District, Khon Kaen province. Its reservoir holds 2,263 million m³. It was completed in 1966 and is run by the Electricity Generating Authority of Thailand (EGAT). The first multipurpose dam in northeastern Thailand.
Reservoir storage today
56.9% of capacity at normal storage level
- Water in the reservoir
- 1,382 million m³
- Usable water
- 801 million m³ (43.3% of usable capacity)
- Inflow
- 2.9 million m³ a day
- Released
- 1.5 million m³ a day
As of 14 Nov 2026 Data from the National Hydroinformatics Data Center (ThaiWater), HII, refreshed every 10 minutes
Storage this year and last
Down 11 million m³ over the last 7 days
905 million m³ less than on the same day last year
- 2026
- 2025
- Normal storage 2,431 million m³
- Upper and lower rule curves
Daily storage from the National Hydroinformatics Data Center (ThaiWater). The rule curves are the range the dam is meant to be kept within through the year.
Try the reservoir
Change the inflow, the release and the rain over the dam's catchment, and see what the reservoir would do over the next 90 days, starting from today's figures.
The reservoir would rise by 1.4 million m³ a day
Over the next 90 days the reservoir reaches neither normal storage, a rule curve nor dead storage
In 90 days it would hold about 1,506 million m³ (61.9% of capacity)
- Actual storage
- Projected
- Normal storage
- Upper and lower rule curves
- Dead storage
Today's storage, plus the inflow and the rain that runs in, less the release, a day at a time; evaporation and seepage are left out. It is arithmetic on the figures you set, not a forecast.
Key facts
- River
- Phong River
- Location
- Ubolratana District, Khon Kaen province
- Coordinates
- 16.7742, 102.6192
- Reservoir capacity
- 2,263 million m³
- Maximum capacity
- 2,431 million m³
- Dead storage
- 581 million m³
- Dam height
- 32 m
- Dam type
- Clay-core rockfill dam
- Installed power capacity
- 25 MW
- Completed or opened
- 1966
- Operator
- Electricity Generating Authority of Thailand (EGAT)
Maximum capacity and dead storage from the Royal Irrigation Department
Frequently asked questions
- Where is Ubol Ratana Dam?
- Ubol Ratana Dam is in Ubolratana District, Khon Kaen province.
- What is the water level of Ubol Ratana Dam today?
- Ubol Ratana Dam is 56.9% full, holding 1,382 million m³, as of 14 Nov 2026.
- How much water can Ubol Ratana Dam hold?
- The reservoir of Ubol Ratana Dam holds 2,263 million m³.
- When was Ubol Ratana Dam built?
- Ubol Ratana Dam was completed and opened in 1966.
- Who runs Ubol Ratana Dam?
- Ubol Ratana Dam is run by the Electricity Generating Authority of Thailand (EGAT).
- What is the Ubol Ratana Dam called in Thai?
- In Thai the Ubol Ratana Dam is เขื่อนอุบลรัตน์.