Sewerage scheme for Cortalim and its suburb areas in Marmagao Taluka – Goa. Part – I
Need of sewerage Treatment plant:
1) All the villages are having 100% coverage in areas of connectivity, health, education, power supply. Only they are lacking in sanitation coverage.
2) The region is urbanized area with great tourism potential.
3) Present disposal system leads to natural drain which is polluting the water bodies.
4) The population of the region has shown steep increase which would increase the pressure on the sewerage system tremendously.
5) The region possesses 24 hours of water supply hence the per capita use of water is also maximum thus there is need of upgradation from soak pit system to underground system to efficiently dispose sewage water generated.
6) Water borne diseases are prevalent in the are due to contamination of water supply lines.
Salient features:
1) Name of the project: Sewerage scheme for Cortalim and its suburban areas (Part-I)
2) State & District : Goa & South Goa
3) Project area :
i) Arrosim
ii) Cansaulim
iii) Cortalim
iv) Cuelim
v) Pale
vi) Quellosim
vii) Sancoale
viii)Velsao
4)Population:
As per 2001 census: 27752
|
Year |
2009 |
2026 |
2041 |
| Stages considered |
Base |
Intermediate |
Ultimate |
| Projected population |
31739 |
42187 |
54221 |
| Rate of water supply (lpcd) |
150 |
150 |
150 |
| Water Supply requirement in MLD |
4.76 |
6.33 |
8.14 |
| Waste water at 80% of WS in MLD |
3.80 |
5.06 |
6.51 |
| Total Sewage generated in MLD |
3.80 |
5.06 |
6.51 |
5)Proposed Sewerage scheme: 15 nos. of Sewerage Zones.
| Area | Cortalim, Arrossim , Cansaulim , , Cuelim , Velsao, Pale, Sancoale ,Quellossim |
| Area in Sq km | 67.87 |
| Population year 2041 | 54221 |
| Water supply requirement In MLD | 8.14 |
| Waste water generated at 80%WS in MLD | 6.51 |
| Total Sewage generated In MLD | 6.51 |
| STP with its capacity | 2 No. of 2.84 MLD at Pale & 3.66 MLD at Cortalim |
| No. of Pumping Stations | 17 |
| Sewerage System proposed in Km | 79776 |
| Treatment process proposed | MBR |
| Cost of the project in (Rs crores) | Rs 360.4 Crores |
IV)Location of STP in the area under project consideration:
The topography of the project area is mountainous region in between and low land region towards the water bodies on either side. The low land region is on the north , the Mountainous and plateau region in between and low land region towards the seas side in the south East. The area very uneven consisting of large difference in contours ranging from 2.5 m to 92 m from mean sea level. Apart from the topography the location point of discharge from the intake of water is seen, the other utilities like land available, power supply facilities, road access and communication facilities etc. was considered to locate the sewage treatment plant.
The plants are proposed to be located at Two places thus dividing the entire project area into 15 distinct sewage zones to facilitate the proper use of the sewage treatment plant and provide an effective collection system. The locations of the four plants are at
1) Pale
2) Cortalim
V) Total Expenditure of the project:
Details of Project Cost:
| i) | Collection & conveyance: | Rs 26827.13 Lakhs | |
| ii) | Pumping Stations : | Rs 206.15 Lakhs | |
| iii) | Transmission mains : | Rs 1359.82 Lakhs | |
| iv) | Pumping machineries and Allied works | Rs 226.13 Lakhs | |
| v) | Automation –SCADA SYSTEM | Rs 900.00 Lakhs | |
| vi) | 1 No. Sewage Treatment Plant | Rs 1614.79 Lakhs | |
| vii) | Sewage Disposal line including diffusion | Rs. 120.00 Lakhs | |
| viii) | Miscellaneous Works | Rs. 189.04 Lakhs | |
| ix) | Total 1: | Rs. 31443.06 Lakhs | |
| x) | Add 3% contingencies | Rs. 943.29 Lakhs | |
| xi) | Total 2 : | Rs. 32386.35 Lakhs | |
| xii) | 1% for third party inspection | Rs. 323.86 Lakhs | |
| xiii) | 1.5% for DPR preparation | Rs. 485.80 Lakhs | |
| xiv) | 1.5% for Capacity Buiding | Rs. 485.80 Lakhs | |
| xv) | Total 3 : | Rs. 33681.81 Lakhs | |
| xvi) | Escalation at 7% | Rs. 2357.73 Lakhs | |
| xvii) | Total cost for approval: | Rs. 36039.54 Lakhs | |
| xvii) | Total cost for approval(Rounded): | Rs. 36040.00 Lakhs | |
| xix) | Total cost of the project in crores: |
|
Rs. 360.40 Crores |
Vi) Project Implementation key milestones:
| i) | Collection & conveyance: | Oct 2010 to March 2013 | |
| ii) | Sewage Pumping Station : | Jan 2011 to June 2013 | |
| iii) | Transmission mains : | Oct 2010 to June 2012 | |
| iv) | Pumping machinery & Allied works : | Oct 2011 to Sept 2013 | |
| v) | SCADA: | Jan 2012 to March 2013 | |
| vi) | STP(2 Nos.) : | Jan 2010 to Sept 2013 | |
| vii) | Sewage Disposal Line : | April 2011 to Sept 2013 | |
| viii) | Miscellaneous works : | Oct 2010 to June 2013 | |
| ix) | Construction Work: | Jan 2011 to March 2013 | |
| x) | Planning /Designing/Tender preparation : | 2010 to 2011 | |
| xi) | Installation & commissioning : | January to March 2014 | |
| xii) | Project Status : | Provide list of approvals/clearances |
Likely Impacts of the Project :
I) Improve the sanitation condition by providing complete sewerage network for conveyance of the sewage.
II) Reduction in water borne diseases.
III) Protecting the natural ecosystem of Zuari River so as to safeguard marine life and pollution of human food chain.
IV) Improve the aesthetic appearance of the region.