Bowatenna Dam

Dam in Bowatenna

07°40′00″N 80°40′00″E / 7.66667°N 80.66667°E / 7.66667; 80.66667StatusOperationalOpening dateJune 1981 (1981-06)Owner(s)Mahaweli AuthorityDam and spillwaysType of damGravity damHeight (foundation)100 ft (30 m)Length741 ft (226 m)Spillway capacity125,000 cu ft/s (3,500 m³/s)ReservoirCreatesBowetenna ReservoirActive capacity21,000 acre⋅ft (26,000,000 m³)Normal elevation800 ft (240 m)Bowatenna Power StationCoordinates07°39′50″N 80°40′39″E / 7.66389°N 80.67750°E / 7.66389; 80.67750Operator(s)CEBTurbines1 × 40 MWInstalled capacity40 MW

The Bowatenna Dam is a 100 ft (30 m) high gravity dam at Bowatenna, in Central Province of Sri Lanka. The dam was built in June 1981, and is used primarily for irrigation. A 40 MW power station is also constructed 5,800 ft (1,800 m) downstream, for hydroelectric power generation.^[1]^[2]

Reservoir and spillways

The dam creates the iconic Bowatenna Reservoir, measuring approximately 11,800 ft (3,600 m) and 10,500 ft (3,200 m) at its widest and longest latitude and longitude, respectively. The reservoir has an active capacity of 21,000 acre⋅ft (26,000,000 m³) and a maximum surface elevation of 800 ft (240 m).^[1]

The dam consists of six spillways, measuring a combined width of 222 ft (68 m), or 16 ft (5 m) each. The spillways combined has a maximum discharge capacity of 125,000 cu ft/s (3,500 m³/s).^[1]

After the completion of the Moragahakanda Dam, a percentage of water from the Bowatenna Reservoir would also be transferred to the new Moragahakanda Reservoir, to be located approximately 3 mi (4.8 km) away, via tunnel.^[3]

Power station

The power station, located 5,800 ft (1,800 m) downstream, consists of a single Fuji 40 MW unit. The power station was commissioned in June 1981.^[2]^[4]

References

^ ^a ^b ^c "Bowatenna Dam and Reservoir". Mahaweli Authority. Retrieved 16 January 2014.
^ ^a ^b "CEB Generation Network". Ceylon Electricity Board. Archived from the original on 16 January 2014. Retrieved 16 January 2014.
^ Ravi Ladduwahetty (28 January 2007). "Moragahakanda and Kalu Ganga development projects". The Nation. Archived from the original on 16 January 2014. Retrieved 16 January 2014.
^ "Hydroelectric Power Plants in Sri Lanka". Industcards.com. 29 July 2012. Retrieved 16 January 2014.

Electricity in Sri Lanka

Sustainable
power stations

Hydro power

Laxapana Complex	Broadlands Canyon Castlereigh Laxapana Maskeliya Norton
Mahaweli Complex	Bowatenna Deduru Oya Kotmale Moragahakanda Nilambe Polgolla Randenigala Rantembe Upper Kotmale Victoria
Other	Gal Oya Kukule Ganga Samanala Udawalawe

Solar power

Wind power

Fossil-fuel
power stations

Operational / UC	Aitken Spence Asia Power Sapugaskanda Colombo Port Ace Embilipitiya KCHT Karadiyana Kelanitissa Lakdhanavi Lakvijaya Northern Sampur (cancelled) Sapugaskanda Sojitz Kelanitissa Uthuru Janani Yugadanavi
Decommissioned	Ace Horana Ace Matara Aggreko Chunnakam Heladhanavi Koolair Pettah

Organizations

Inland waters of Sri Lanka

Rivers

≥100km	Deduru Oya Gal Oya Gin Ganga Kala Oya Kalu Ganga Kukule Ganga Kelani River Kehelgamu Oya Maskeliya Oya Pusweli Oya Kirindi Oya Kumbukkan Oya Maduru Oya Maha Oya Malwathu Oya Amban Ganga Kotmale Oya Nanu Oya Mahaweli Ganga Menik Ganga Mi Oya Walawe River Belihul Oya Yan Oya
<100km	Akkarayan Aru Kanakarayan Aru Kodalikkallu Aru Madu Ganga Mandekal Aru Mavil Aru Nay Aru (Mannar) Nay Aru (Mullaitivu) Netheli Aru Nilwala River Pali Aru Pallavarayankaddu Aru Parangi Aru Per Aru Piramenthal Aru Theravil Aru Valukkai Aru Verugal Aru

Lakes

Lagoons

Eastern coast	Batticaloa Lagoon Chalai Lagoon Chundikkulam Lagoon Kokkilai Lagoon Nai Aru Lagoon Nanthi Lagoon Ullackalie Lagoon Upaar Lagoon Vadamarachchi Lagoon Valaichchenai Lagoon
Western coast	Jaffna Lagoon Mundal Lagoon Negombo Lagoon Puttalam Lagoon Uppu Aru Lagoon
Southern coast	Koggala Lagoon Rekawa Lagoon Malala-Ambilikala Lagoons