• Total number of dams in Kerala for irrigation purpose - 18
• The largest reservoir in Kerala - Malampuzha Dam (Palakkad)
• The first dam in Kerala - Mullaperiyar Dam (Idukki)
• The largest dam in Kerala - Malampuzha Dam 
• The first arch dam in India - Idukki Dam
• The largest irrigation project in Kerala - Kallada (Kollam)
• The second largest irrigation project in Kerala - Thenmala (Kollam)
• The river which has largest number of irrigation projects in Kerala - Bharatapuzha
• The district which has largest number of irrigation project - Palakkad
• The largest earthen dam in India - Banasura Sagar Dam (Wayanad)
• First concrete dam in Kerala - Mattupetti Dam (Idukki)
• The smallest hydro electric project in Kerala - Mattupetti
• The first hydro-electric project in Kerala - Pallivasal Dam
• The largest hydroelectric project in Kerala - Idukki Dam
  

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1. Banasura Sagar Dam

• The largest earth dam in India
• Second largest earth dam in Asia
• It is constructed across the river Kabani
• The district in which the dam located - Wayand
• Constructed in 1979

2. Idukki Dam

•  First arch dam in Asia
• Started construction in 30 April 1969
• Inaugurated in 1973
• It consists of three dams at Idukki, Cheruthoni and Kulamavu
• The tribal leader who suggested the spot for Idukki Dam - Kolumban Mooppan
• The Prime Minister who commissioned the commercial operation of Idukki Dam - Indira Gandhi (1976)
• Idukki dam is located on the Periyar river between the Kuravan Mala and Kurathi Mala
• The under ground power station of Idukki dam - Moolamattam Power Station
• Longest under ground hydro electric power station in India - Moolammattom
• The initial operating capacity of Idukki Hydro - electric power project - 750 MW

3. Malampuzha Dam

•  The largest reservoir in Kerala
• It is located in Palakkad District
• Dam was built across the Malampuzha River (Tributary of Bharatapuzha)
• The construction of Malampuzha dam bagan in  - March 1949
• The dam was inaugurate in the year - 1955

4.Mattupetti Dam

• Constructed in the year 1953
• First concrete dam in Kerala
• Smallest hydro electric power station in Kerala

 
5 Mullaperiyar Dam

•  First dam in Kerala 
• The district in which Mullaperiyar Dam located - Idukki
• The construction work of the dam started in the year - 1887
• It was commissioned in the year - 1895
• Mullaperiyar lease agreement was signed on - 29 October 1886
• The dam was made with - Surki Mixture
• The Mullaperiyar dam built across the dam - Periyar
• The taluk in which Mullaperiyar dam located - Peerumedu (Panchayat - Kumily)
• The lease agreement was signed by - V Ram Iyengar (Diwan of Travancore) and J C Hannington (State Secretary of Madras State)
• The agreement was renewed in 1970 during the ministry of C Achutha Menon
• The Mullaperiyar dam was inagurated during the reign of Sri Moolam Thirunal Rama Varma
• Mullaperiyar dam was inagurated by Lord Welock  (Governor of Madras Presidency)
• The chief architect of Mullaperiyar Dam - John Pennyeuick
• The states that were in dispute for Mullaperiyar dam - Kerala and Tamil Nadu
• The Periyar National Park in Thekkady is located around the dams reservoir.

6.Peechi Dam

• Inaugurated in 1957
• Dam is built across the river Manali in Thrissur District
• Architect of Peechi Dam - E. Ikkanda Warrier
• Peechi - Vazhani wild life sanctuary established in 1958

7.Thenmala, Dam

• Second largest irrigation project in Kerala
• Dam was built across the river Kallada
• Thenmala dam was constructed in the year 1961
• Thenmala dam shares the border with Senthurini wild life sanctuary