Greater Shillong Water Supply Scheme - A report
Project Objective :The project is a continuing programme by the State Government to provide water supply facilities to its capital city Shillong and the adjoining areas to keep pace with the increasing demand from population growth.
Project Description :
- The project with a designed period of 30 years and 1978 as the base year is intended to cater potable water supply to an urban and sub-urban population of 3.11 lacs and to a rural population of 0.40 lacs. The ultimate supply shall be 11.30 million gallons of water per day.
- The project envisages pumping of water from the River Umiew near Mawphlang against a total head of 321m to the water treatment plant located at Mawphlang village.
- The existing water treatment plant of the project commissioned in 1986 is designed to yield 7.5 million gallon of treated water per day. The additional water treatment plant of 3.8 Mgd capacity is under testing. The 2 water treatment plant shall provide a complete treatment of 11.30 Mgd.
- Treated water from the plant’s clear water reservoir gravitate to different zonal reservoirs located in different parts of the state capital. Water from the zonal reservoirs are distributed to consumers through a network of distribution system.
- Though the project envisages construction of dam, construction of dam could not earlier be taken up due to fund constraint. Temporary flexible weir was instead constructed across the River Umiew immediately downstream of the intake structure to provide the immediate benefit on completion of Phase I.
Project Estimated Cost :
- The project which was originally estimated to cost Rs. 2390.00 lacs in 1978 was revised to Rs. 5822.52 lacs in 1993. Further, owing to continuing escalation in cost of materials and labours etc., the cost of the project was re-revised to Rs. 9503.77 lacs in the year 2000.
- The original, revised and re-revised project estimated cost was accorded technical approval by the Ministry of Urban Development, CPHEEO, Government of India.
Project Financing & Funding:
- Though the project was taken up for implementation way back in the year 1979, the desired progress over the years could not be achieved in view of limited State Plan Resources leading to time and cost overrun of the project.
- Following the inclusion of the project for financing under Non-Lapsable Central Pool of Resources in the year 1998-99, construction of the mass gravity concrete dam was possible. An amount of Rs. 3579.00 lacs has been received under NLCPR for the project. The details are indicated herein below :
| Sl. No. | Year | Amount Received |
|---|---|---|
| 1. | 1998-1999 | 379 |
| 2. | 1999-2000 | 300 |
| 3. | 2000-2001 | 650 |
| 4. | 2001-2002 | 1000 |
| 5 | 2002-2003 | 1250 |
| Grand Total | 3579 | |
Project Physical Progress :
- Following the commissioning of the Phase-I of the project in the year 1986 and the urgent need to construct a dam to impound sufficient water for pumping by the system to cater to the ultimate demand of 11.30 Mgd by 2009, construction of a mass gravity concrete dam of 130m wide and 50m high across the River Umiew at Mawphlang was taken up in 1997 and is now completed.
- With the completion of the Dam, a reservoir of capacity 9.145 million cubic meter has been created to enable pumping of 11.3 Mgd of water to cater to the drinking water needs of a total 3,51,000 population.
- The distribution networks of the state capital was divided under 9 zones. Works on all the 9 zones have been taken up and the position is as indicated herein below:
| Sl. No. | Zone No. | Area of Coverage | Position |
|---|---|---|---|
| 1 | I | Police Bazar, Jail Road, Oak Land, Assembly Areas | Completed and commissioned |
| 2 | II | Lachumiere, Secretariat Hill | Completed, tested and under commissioning. Presently water is however supplied through the existing networks |
| 3 | III | Laitumkhrah | Completed and commissioned |
| 4 | IV | Malki, Dhankheti Area | Completed and under testing and commissioning. |
| 5 | V | Nongthymmai, Umpling, Rynjah | 70% completed, tested and commissioned. Remaining 30% under testing and commissioning. |
| 6 | VI | Pasteur Institute, Lawmali, Part of Mawlai Mawroh, Polo Bazar, Polo Hills, Forest Colony, Nongmali | 50% completed, tested and commissioned. Remaining 50% under testing and commissioning |
| 7 | VIII | Mawlai | Completed and commissioned |
| 8 | IX | Laban, Bishnupur, Rilbong, Kench’s Trace | Completed and commissioned |
| 9 | X | Mawprem, Jaïaw, Mawkhar, South East Mawkhar, Barapathar | Completed and commissioned |
Project Financial Progress: The project has incurred an expenditure of Rs.9263.26 lacs as on 31.03.2005. Out of which, the expenditure under State Plan is Rs.5684.26 lacs and the expenditure under Non-Lapsable Central Pool of Resources is Rs. 3579.00 lacs. Utilisation certificate for the full utilisation of the fund including photographs etc. have been forwarded to DONER.
Conclusion : The inclusion of the project for funding under Non-Lapsable Central Pool of Resources in the year 1998-99 and the subsequent release of adequate fund thereafter has enable the Department to achieve the desired progress on construction of dam and has also enable the Department to take up implementation of the remaining zones of distribution system. The project is targeted for completion by March 2006.
