Sewerage scheme for Navelim and its surrounding regions in Salcete Taluka – Goa.

I) Need of sewerage Treatment Plant:

1)    Unsafe disposal of sewage into the river Sal and Saipem Lake thus contaminating water bodies further in the near by areas.

2)    The area being close to Margao city has high housing demand which would generate problems of disposal of sewage.

3)    The area has great tourism potential hence situation in tourist season would be  bad due to high extraction  levels of water and more generation of waste.

4)    The population trend displays steep increase in population in last 10 years specially in Navelim area which would worsen the sewage disposal  situation if the trend continues.

5)    The area is having 24 hours of water supply hence the per capita use  of water is also maximum so there is need of upgradation from soak pit system to underground drainage system which would efficiently dispose the sewage water generated.

6)    Water borne diseases are prevalent in the area due to contamination of water supply lines.

II) Salient features:

1)    Name of the project :

Sewerage scheme for Navelim and its surrounding region.

2)    State & District : Goa (South Goa)

3)    Project area :
i) Navelim                            ii) Davorlim

iii) Talaulim                          iv) Dicarpale

v) Aquem                             vi) Ramdamol

4) Population:
As per 2001 census: 35569

5) Proposed Sewerage scheme: 4 Sewage collection zones proposed.

Sewerage Zones

IV) Location of STP in the area under project consideration:

The topography of the project area is mountainous region on the east side, plateau region in between and low lands area in the west side. Thus the area is mixture of mountains, plateau and low lands. Apart from the topography the location of STP depends on location of discharge point of the treated sewerage from the intake of water works, the other utilities like land available, power supply conditions, roads and communication means etc. was considered to locate the sewage treatment plant.

The plant is proposed to be located at Navelim near the Saipem Lake   and vicinity of Sal River. The entire project area is divided into four zones to facilitate the collection of the sewerage from the intake of water works. The zones are detailed as below:

1)    Zone1: Davorlim,Dicarpale,Ramdamol,Aquem and Navelim (Part)
2)    Zone2: Talaulim (part) and Navelim (part)
3)    Zone3: Dicarpale
4)    Zone4: Navelim (part) and Talaulim (part)

V) Total Expenditure of the project:
Details of Project Cost:

    i.)   Collection & conveyance :                               Rs  13405.63  Lakhs

   ii.)   Pumping Stations :                                           Rs      163.69  Lakhs

 iii.)   Transmission mains :                                        Rs      404.57  Lakhs

 iv.)    Pumping machineries and Allied works         Rs        96.60  Lakhs

   v.)    Automation –SCADA SYSTEM                     Rs      375.00  Lakhs

 vi.)    1 No. Sewage Treatment  Plant                      Rs    1698.49  Lakhs

vii.)    Sewage Disposal line including diffusion      Rs.     525.00  Lakhs

viii.)    Miscellaneous Works                                      Rs.     100.87  Lakhs

 ix.)    Total 1:                                                                Rs. 16769.85  Lakhs

   x.)    Add 3% contingencies                                    Rs.     503.00  Lakhs

 xi.)    Total 2:                                                                Rs. 17272.95  Lakhs

xii.)    1% for third party inspection                            Rs.     172.73  Lakhs

xiii.)    1.5% for DPR preparation                              Rs.     259.10  Lakhs

xiv.)    1.5% for Capacity Buiding                              Rs.     259.10  Lakhs

xv.)    Total 3 :                                                               Rs. 17963.88  Lakhs

xvi.)     Escalation at 7%                                             Rs.   1257.47  Lakhs

xvii.)     Total cost for approval:                                  Rs. 19221.35  Lakhs

xviii.)     Total cost for approval(Rounded):               Rs. 19225.00  Lakhs

xix.)      Total cost of the project in crores:        Rs. 192.25 Crores

Vi) Project Implementation key milestones:

Likely Impacts of the Project:
I) Improvement in sanitation condition by providing complete sewerage network.
II) Reduction in spread of water borne diseases.
III) Protect the natural ecosystem of river Sal and Saipem Lake.
IV) Improvement in aesthetic appearance of the region.