Augmentation of Water Supply to Hyderabad Metropolitan Area from River Krishna, Nagarjuna Sagar

To meet the projected demand of HMWSSB's service area up to horizon year 2021, it has been proposed to take up Krishna Water Supply Project in three phases for supplying 270 Mgd of clear water as follows:

• Phase-I, Stage-1 during 2002-2004 for supplying 45 Mgd, through a pipeline of 90 Mgd capacity.
• Phase-I, Stage-2 during 2004-2006 for adding 45 Mgd, through a pipeline laid in Phase-I, Stage-I above.
• Phase-II, during 2006-2011 for supplying 90 Mgd.
• Phase-III, Stage-1 during 2011-2016 for supplying 45 Mgd, through a pipeline of 90 Mgd capacity
• Phase-III, Stage-2 during 2016-2021 for adding 45 Mgd, through a pipeline laid in Phase-III Stage-1.

The details of Phase-I, Stage-I scheme are as given below:

1. This scheme envisages to draw, treat and transmit 45 Mgd (205 Mld) of treated water to the twin cities of Hyderabad and Secunderabad by tapping the raw water from the Akkampall Balancing Reservoir (Srisailam Left Bank Canal Lift Scheme) through the 2500 mm gravity pipeline for a length of 4 KM up to the proposed 45 Mgd capacity Water Treatment Plant to be constructed near Kodandapur at KM 116 of Hyderabad - Nagarjuna Sagar State Highway. The treated water will be pumped in three stages through 2200mm diameter MS pipeline to a length of about 114 Kms against a static head of 406 m with total power requirement of 15 MW for pumping 45 Mgd of water. Enroute storage reservoirs of total 90 ML capacity are proposed at Kodandapur, Nasarlapally, Godakondla, Gingal and Sahebnagar.
    
2. The proposed drinking water supply addition of 45 Mgd into HMWSSB's system would suffice for meeting the water demand of Hyderabad metropolitan area for the year 2004 with other improvement measures beind tackled seperately such as UFW management, refurbishment af the existing water supply system. Rain water harvesting measures in the habitated areas, planning for recycling the treated sewage for non-domestic uses etc.
    
3. The SLBC scheme is designed with MDDL as +155.45m (FRL of Nagarjuna Sagar reservoir is 179.80m). In drought years if the MDDL falls below +155.45m, the raw water required for drinking water supply scheme needs to be drawn from independent offtake arrangements at Sunkishala from the foreshore of Nagarjuna Sagar reservoir with MDDL of +145.00m. The cost of the said proposals work out to about Rs.200.00 Crores. These proposals involve construction of independent intake tower with raw water pump house and pumping equipment involving raw water transmission main to a length of 17.2 Kms., with additional static lift of about 83.50m.
    
4. The land required for implementation of the project for locating the various enroute water treatment plant, reservoirs etc., is already taken possession (only a small extent of land required for detouring the pipeline at three places away from the state highway is to be taken possession). The state R&B Department has given permission for laying the pipeline on one side of the state highway Hyderabad - Nagarjunasagar.
    
5. The project is programmed for completion in a period of thirty months from zero month.
    
6. The phase-I, Stage-1 project cost is estimated as Rs.875.00 Crores and Rs.1000.00 Crores with IDC.

The funding pattern for Phase-I, Stage-1 of the project is as follows:

Administrative sanction has been accorded for Rs.875.00 crores plus interest during construction vide G.O.Ms.No:559, MA, Dt:23rd November 2001 for 30% with Govt., contribution during the years.

Present status of Phase-I, Stage-1 project:

1. Tenders received and are under evaluation for pipelines in four packages costing Rs.461.00 crores.
2. Tenders for water treatment plant of 45 Mgd capacity are due on 1st Aug`2002.

The details of Phase-I, Stage-2 scheme are as given below:

The second phase of the project is intended to increase thecapacity by another 45 Mgd (205 Mld) of treated water which would cost about Rs.400.00 crores. This includes increasing the capacity of water treatment units and adding additional pumping units and additional storage capacities for enroute reservoirs. This can be programmed and implemented by 2006 to meet the water demand of year 2006.