| Dam/Weir: NARAKAKKANAM WEIR | |||
| Location | Latitude : 9⁰ 50′ N | Dam Features | |
| Longitude: 77⁰ 00′ E | Type of Dam | Concrete- Gravity | |
| Panchayath | Mariyapuram | Classification | Weir |
| Village | Thankamani | Maximum Water Level (MWL) | EL 770.00 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 768.00 m |
| River Basin | Periyar | Storage at FRL | 0.00396 Mm3 |
| River | Narakakkanam river | Height from deepest foundation | 11.50 m |
| Release from Dam to river | Periyar | Length | 45.20 m |
| Taluk through which release flows | Thodupuzha | Spillway | Ungated – Overflow section |
| Year of completion | Crest Level | EL 768.00 m | |
| Name of Project | Idukki HEP | River Outlet | Not provided |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom. Phone-9496009429 |
| Installed capacity of the Project | 780 MW | ||
| Project Identification Code ( PIC) | Nil | ||
| Narakakkanam weir is an augmentation weir for the Idukki Hydro Electric Project . Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir . |
| Dam/Weir: AZHUTHA WEIR | |||
| Location | Latitude : 9⁰ 33′ 50 ” N | Dam Features | |
| Longitude: 76⁰ 59′ 30” E | Type of Dam | Concrete- Gravity | |
| Panchayath | Peermade | Classification | Weir |
| Village | Peermade | Maximum Water Level (MWL) | EL 960.20 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 956.00 m |
| River Basin | Pamba | Storage at FRL | 0.140 Mm3 |
| River | Azhutha river | Height from deepest foundation | 13.50 m |
| Release from Dam to river | Azhutha river | Length | 116.30 m |
| Taluk through which release flows | Ranni, Ayroor | Spillway | Ungated – Overflow section |
| Year of completion | 2007 | Crest Level | EL 956.00 m |
| Name of Project | Idukki HEP | River Outlet | 1 No. Circular type, 0.75 m dia |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom. Phone-9496009429 |
| Installed capacity of the Project | 780 MW | ||
| Length of Tunnel – 4029m, 2.8m D-shaped | |||
| Project Identification Code ( PIC) | Nil | ||
| Azhutha weir is constructed as an augmentation weir for the Idukki Hydro Electric Project. Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir Azhutha diversion scheme envisages diversion of water to Idukki reservoir from a catchment area 16.83 sq. km in the upper reaches of Azhutha ar, a major tributary Pamba ar for increasing the power potential of Idukki power station. |
| Dam/Weir: VADAKKEPUZHA WEIR | |||
| Location | Latitude : 9⁰ 47′ 00 ” N | Dam Features | |
| Longitude: 76⁰ 51′ E | Type of Dam | Earthen- bund | |
| Panchayath | Arakkulam | Classification | Weir |
| Village | Arakkulam | Maximum Water Level (MWL) | EL 724.00 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 723.25 m |
| River Basin | Periyar | Storage at FRL | 0.0667 Mm3 |
| River | Vadakkepuzha | Height from deepest foundation | 2.80m ( Height from bed level) |
| Release from Dam to river | Malankara reservoir | Length | |
| Taluk through which release flows | Thodupuzha | Spillway | Ungated – Overflow section |
| Year of completion | 2003 | Crest Level | NA |
| Name of Project | Idukki HEP | River Outlet | Not provided |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom. Phone-9496009429 |
| Installed capacity of the Project | 780 MW | ||
| Project Identification Code ( PIC) | Nil | ||
| Vadakkepuzha weir is a part of an augmentation scheme for the Idukki Hydro Electric Project. Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to Idukki HEP to augment the reservoir . Water from the reservoir is pumped in to Idukki reservoir through a pump house with three pumps. |
| Dam/Weir: KUTTIAR WEIR | |||
| Location | Latitude : 9⁰ 43’56.1″ N | Dam Features | |
| Longitude: 76⁰ 53′ 6.34″ E | Type of Dam | Concrete- Gravity | |
| Panchayath | Elappara | Classification | Weir |
| Village | Vagamon | Maximum Water Level (MWL) | EL 798.00 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 795.50 m |
| River Basin | Periyar | Storage at FRL | 0.35 Mm3 |
| River | Kuttiar river | Height from deepest foundation | 16.50 m |
| Release from Dam to river | Thodupuzha ar | Length | 101.35 m |
| Taluk through which release flows | Thodupuzha | Spillway | Ungated – Overflow section |
| Year of completion | 2009 | Crest Level | EL 795.50 m |
| Name of Project | Idukki HEP | River Outlet | 1 No. Circular type, 0.75 m dia |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom. Phone-9496009429 |
| Installed capacity of the Project | 780 MW | ||
| Project Identification Code ( PIC) | Nil | ||
| The Kuttiar weir is constructed for augmenting water to the Idukki Hydro Electric Project. Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir. The Kuttiar diversion scheme envisages diversion of water from 10.4 sq. km of catchment of Kuttiar ar to Idukki reservoir by constructing an unlined tunnel of 2697.3 m length and a weir of 101.30 m long for an additional 37 Mu power generation at Idukki Power station. |
| Dam/Weir: VAZHIKADAVU WEIR | |||
| Location | Latitude : 9⁰ 41′ N | Dam Features | |
| Longitude: 76⁰ 54′ E | Type of Dam | Concrete- Gravity | |
| Panchayath | Teekoy | Classification | Weir |
| Village | Teekoy | Maximum Water Level (MWL) | EL 939.00 m |
| District | Kottayam | Full Reservoir Level ( FRL) | EL 936.70 m |
| River Basin | Periyar | Storage at FRL | 0.18 Mm3 |
| River | Meenachil river | Height from deepest foundation | 10.20 m |
| Release from Dam to river | Meenachil river | Length | 75.00 m |
| Taluk through which release flows | Meenachil | Spillway | Ungated – Overflow section |
| Year of completion | 2002 | Crest Level | EL 936.70 m |
| Name of Project | Idukki HEP | River Outlet | 1 No. Circular type, 0.75 m dia |
| Type of Project | Hydro Power | Officers in charge & phone No. | Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom, Phone- 9496009429 |
| Installed capacity of the Project | 780 MW | ||
| Length of Tunnel – 2579.25m, 2.5m D shaped. | |||
| Project Identification Code ( PIC) | Nil | ||
| The Vazhikkadavu weir is constructed as an augmentation scheme to Idukki HEP. Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir . The Vazhikadavu diversion scheme envisages diversion of the water from 6 sq. Km catchment of Vazhikkadavu Ar ( tributory of Meenachil Ar.) to Idukki reservoir by constructing an unlined tunnel of 2579.25 m and weir 75 m long for regulation and additional power generation of 18.2 Mu at Idukki Power station. The weir site and tunnel inlet are located in Meenachil taluk of Kottayam District and tunnel exit site is located in Peermade taluk of Idukki district. The diversion weir site is near Vagomon – 2 Km from Vagamon town on Vagomon Erattupetta road. |
| Dam/Weir: R A Head works | |||
| Location | Latitude : 10⁰ 04’00” N N | Dam Features | |
| Longitude: 77⁰ 04′ 00″ E | Type of Dam | Masonry | |
| Panchayath | Munnar | Classification | Weir |
| Village | Munnar | Maximum Water Level (MWL) | EL 1450.92 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 1450.92 m |
| River Basin | Muthirapuzha | Storage at FRL | 0.223 Mm3 |
| River | Muthirapuzha | Height from deepest foundation | 10.90 m |
| Release from Dam to river | Muthirapuzha | Length | 39.62 m |
| Taluk through which release flows | Devikulam | Spillway | Vertical gate, 3 Nos. of size 11.60 x 6.70 m each |
| Year of completion | 1944 | Crest Level | EL 1439.02 m |
| Name of Project | Pallivasal HEP | River Outlet | Not provided |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Executive Engineer, Generation Division, Chithirapuram PIN- 685565 Phone-9446008445 |
| Installed capacity of the Project | 37.50 MW | Asst. Exe. Engineer, Generation Sub Division, Pallivasal PIN- 685565 Phone – 9446008449 | |
| Project Identification Code ( PIC) | Nil | ||
| Pallivasal Hydro Electric Project, the first hydro power project of Kerala State. There are two dams and one diversion weir as part of this project. These are Kundala Dam, Maduppetty Dam and R A Head works. Ramaswamy Aiyer Headworks is located 15 km downstream of Maduppetty Dam near Munnar. The water stored in the Kundala reservoir is released through the stream to Maduppetty Dam located downstream. From the Maduppetty reservoir the water is released to downstream through a dam toe power house. The controlled release from Maduppetty Dam reaches the diversion weir named R.A. Head works and from there, the water is diverted through a water conducting system to the power house of Pallivasal HEP located on the right bank of Mudirapuzha river. After generating power, the tail water is pumped to the balancing reservoir of Sengulam Hydro Electric Project and the surplus water from the sump of pumping station is spilled to the Mudirapuzha river itself. |
RA Headworks| Dam/Weir: PARAKKADAVU WEIR | |||
| Location | Latitude : 10⁰ 0′ 39 ” N | Dam Features | |
| Longitude: 77⁰ 01′ 58” E | Type of Dam | Concrete | |
| Panchayath | Vellathooval | Classification | Weir |
| Village | Vellathooval | Maximum Water Level (MWL) | |
| District | Idukki | Full Reservoir Level ( FRL) | EL 722.3 m |
| River Basin | Storage at FRL | Diversion only | |
| River | Parakkadavu | Height from deepest foundation | |
| Release from Dam to river | Length | ||
| Taluk through which release flows | Spillway | ||
| Year of completion | Crest Level | ||
| Name of Project | Panniar HEP | River Outlet | |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Executive Engineer, Dam Safety Division No. IV, Pambla, Idukki (Dist.), Kerala, PIN- 685606 Phone-9446008421 |
| Installed capacity of the Project | 32.4 MW | Assistant Executive Engineer, Dam Safety Sub Division, Kallarkutty PIN- 685562 Phone-9496011963 | |
| Project Identification Code ( PIC) | Nil | ||
| Parakkadavu weir is constructed as a part of Panniar Augmentation Scheme. Spill water from RA Headworks in Mudirappuzha river is partly diverted at Ellackal through a tunnel to Parakkadavu weir. From Parakkadavu weir the water is diverted to Mullakkanam weir and from this weir to Ponmudi reservoir. |
Parakkadavu| Dam/Weir: MULLAKKANAM WEIR | |||
| Location | Latitude : 10⁰ 0′ 39 ” N | Dam Features | |
| Longitude: 77⁰ 01′ 58” E | Type of Dam | Concrete | |
| Panchayath | Vellathooval | Classification | Weir |
| Village | Vellathooval | Maximum Water Level (MWL) | |
| District | Idukki | Full Reservoir Level ( FRL) | EL 717.50 m |
| River Basin | Storage at FRL | Diversion only | |
| River | Mullakkanam | Height from deepest foundation | |
| Release from Dam to river | Length | ||
| Taluk through which release flows | Spillway | ||
| Year of completion | Crest Level | ||
| Name of Project | Panniar HEP | River Outlet | |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Executive Engineer, Dam Safety Division No. IV, Pambla, Idukki (Dist.), Kerala, PIN- 685606 Phone-9446008421 |
| Installed capacity of the Project | 32.4 MW | Assistant Executive Engineer, Dam Safety Sub Division, Kallarkutty PIN- 685562 Phone-9496011963 | |
| Project Identification Code ( PIC) | Nil | ||
| This weir is constructed as a part of Panniar Augmentation Scheme. Spill water from RA Head works in Mudirapuzha is partly diverted at Ellackal through a tunnel to Parakkadavu weir. From Parakkadavu weir these waters are diverted to Mullakkanam weir and from there to Ponmudi reservoir. |
Mullakkanam| Dam/Weir: VIRIPARA WEIR | |||
| Location | Latitude : N | Dam Features | |
| Longitude: E | Type of Dam | Masonry | |
| Panchayath | Mankulam | Classification | Weir |
| Village | Mankulam | Maximum Water Level (MWL) | |
| District | Idukki | Full Reservoir Level ( FRL) | EL 1141.59 m |
| River Basin | Periyar | Storage at FRL | Diversion only |
| River | Upper Kallar | Height from deepest foundation | 4.57m |
| Release from Dam to river | Menachery ar | Length | |
| Taluk through which release flows | Devikulam | Spillway | Overflow weir |
| Year of completion | 1961 | Crest Level | EL 1141.59 m |
| Name of Project | Neriamangalam HEP | River Outlet | Nil |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Executive Engineer, Generation Division, Chithirapuram PIN- 685565 Phone-9446008445 |
| Installed capacity of the Project | 52.5 MW | Asst. Exe. Engineer, Generation Sub Division, Pallivasal PIN- 685565 Phone – 9446008449 | |
| Project Identification Code ( PIC) | Nil | ||
| The Viripara weir is constructed as an augmentation scheme to Neriamangalam Hydro Electric Project. Upper Kallar, a tributary of Pooyankutty river is diverted in to Kallarkutty reservoir by a low diversion weir at Viripara along with a short diversion tunnel. |
Virippara| Dam/Weir: VELLATHOOVAL WEIR | |||
| Location | Latitude : 9⁰ 58′ 27.92 ” N | Dam Features | |
| Longitude: 77⁰ 01′ 40.04” E | Type of Dam | Concrete – gravity | |
| Panchayath | Vellathooval | Classification | Weir |
| Village | Vellathooval | Maximum Water Level (MWL) | EL 474.80 m |
| District | Idukki | Full Reservoir Level ( FRL) | EL 472.0 m |
| River Basin | Muthirappuzha | Storage at FRL | 0.069 Mm3 |
| River | Muthirapuzha | Height from deepest foundation | 16 m |
| Release from Dam to river | Muthirappuzha | Length | 75 m |
| Taluk through which release flows | Devikulam & Idukki | Spillway | Ungated |
| Year of completion | 2016 | Crest Level | 472.00 m |
| Name of Project | Vellathooval Small H E P | River Outlet | 1 No. Circular type, 1.00 m dia. |
| Purpose of Project | Hydro Power | Officers in charge & phone No. | Executive Engineer, Generation Division, Kallarkutty PIN-685562 Phone- 9446008446 |
| Installed capacity of the Project | 3.6MW (2×1.8 MW) | Assistant Executive Engineer, Generation Sub Division, Panniar, PIN- 685563 Phone – 9446008450 | |
| Project Identification Code ( PIC) | Nil | ||
| Vellathooval weir is situated in Idukki district at Vellathooval village in Devikulam Taluk. The inflow of Vellathooval weir is governed by the tail race release of Sengulam Power House and the inflow of Muthirapuzha river. Water from this weir is diverted through a water conductor system to the Powerhouse constructed near Panniyar Power House. After generating power, the water is released to Muthirapuzha ar. |
Vellathooval