Storage dam
Bang Lang Dam
เขื่อนบางลาง
Bang Lang Dam is a storage dam on the Pattani River in Bannang Sata District, Yala province. Its reservoir holds 1,420 million m³. It was completed in 1981 and is run by the Electricity Generating Authority of Thailand (EGAT).
Reservoir storage today
53.2% of capacity at normal storage level
- Water in the reservoir
- 773 million m³
- Usable water
- 497 million m³ (42.2% of usable capacity)
- Inflow
- 4.8 million m³ a day
- Released
- 4 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
Hardly changed over the last 7 days
116 million m³ more than on the same day last year
- 2026
- 2025
- Normal storage 1,454 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 0.8 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 849 million m³ (58.4% 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
- Pattani River
- Location
- Bannang Sata District, Yala province
- Coordinates
- 6.1564, 101.2736
- Reservoir capacity
- 1,420 million m³
- Maximum capacity
- 1,590 million m³
- Dead storage
- 276 million m³
- Dam height
- 85 m
- Dam type
- Embankment dam
- Installed power capacity
- 72 MW
- Completed or opened
- 1981
- Operator
- Electricity Generating Authority of Thailand (EGAT)
Maximum capacity and dead storage from the Royal Irrigation Department
Frequently asked questions
- Where is Bang Lang Dam?
- Bang Lang Dam is in Bannang Sata District, Yala province.
- What is the water level of Bang Lang Dam today?
- Bang Lang Dam is 53.2% full, holding 773 million m³, as of 14 Nov 2026.
- How much water can Bang Lang Dam hold?
- The reservoir of Bang Lang Dam holds 1,420 million m³.
- When was Bang Lang Dam built?
- Bang Lang Dam was completed and opened in 1981.
- Who runs Bang Lang Dam?
- Bang Lang Dam is run by the Electricity Generating Authority of Thailand (EGAT).
- What is the Bang Lang Dam called in Thai?
- In Thai the Bang Lang Dam is เขื่อนบางลาง.