1                  Sewerage System

 

1.1                                    Introduction

Sewerage system is as important as the water supply system and forms an integral part of environmental character of a city. Sewage treatment facilities of Shimla have been substantially improved over the years to cater to future demand.

1.2                                    Policy, Regulatory and Institutional Framework

 

I&PH and SMC are responsible for provision of sewerage system and related services in SPA. I&PH is involved in planning, construction, operation & maintenance of sewerage collection, treatment and disposal system. SMC maintains domestic and commercial connections from the door end to the main sewer lines, billing and collection and attending to citizen’s grievances.

1.3                                    Sewerage System

Shimla Municipal Area has a well-laid underground sewerage system and is maintained by I&PH. The first sewerage network was laid in the year 1880 to serve a population of 18000. In year 2005, under the assistance from OPEC and state funding, a new sewerage network for Shimla was designed and implemented to cater the demand for year 2031.  Figure 9.1 shows the sewerage system of Shimla

 

1.4                                    Network Coverage

The network of new sewerage system in Shimla is about 179 km and diameter of sewer pipes ranges from 150 mm to 800 mm.  The new network of main sewer lines are shown in Figure 9.1. The network covers 90% of municipal area serving upto 80% of population.  Special Areas, which are now merged in SMC, are without any sewerage network. Table 9.1 presents the performance indicators of the sewerage system.

Table  STYLEREF 1 \s 1. SEQ Table \* ARABIC \s 1 1  Performance Indicators

S. N.

Indicator

SMC Area

Dhalli, Tutu, New Shimla

Special Areas of Ghanahatti, Kufri, and Shoghi

1

Network Coverage

90%

No coverage

No coverage

2

Access to Sewerage

80%

No access

No access

3

Total Quantity Collected

4.80 MLD

Information Not Available

Information Not Available

4

Capacity of Treatment Plants

35.63 MLD

-

-

5

Utilization of treatment and disposal plants

13.5%

Septic Tanks

Septic Tanks

6

Recycling / Reuse

Nil

Nil

Nil

 


 

 

1.5                                    Sewage Treatment Plants

I&PH has constructed 6 Sewage Treatment Plants (STPs) with total capacity of 35.63 MLD through OPEC funding. I&PH has given operation & maintenance of these STPs on management contract. The details of Treatment plants are presented in Table 9.2. Plate 9.1 to 9.3 show pictures of STPs in Shimla Planning Area. The total sewage received by six plants is only about 4.8 MLD for treatment. The treated effluents from STPs are disposed in adjoining Nallahs.

Table  STYLEREF 1 \s 1. SEQ Table \* ARABIC \s 1 2  Details of Sewerage Treatment Plant

S. N

Name of Sewage Treatment Plant

Capacity  (MLD)

Locations

Technology Used

 

1

Lalpani

19.35

Near Baragaon on Shoghi Bypass

UASB

 

2

Sanjauli Malyana

4.44

Below Malyana Village on Shoghi Sanjauli Bypass

Extended Aeration System

 

3

Dhalli

0.76

Below Dhalli Churat Road

 

4

Snowdown

1.35

Near Barmoo Village below Snowdown

 

5

North Disposal

5.80

At Golcha below Annadale

 

6

Summer Hill

3.93

At Gadog Village Summer Hill

 

 

 

1.6                                    Recycling and Reuse of Treated Water

Presently, the treated sewage disposed in nallahs is used by downstream people for cultivation. The recycling and reuse of treated sewage for non potable purpose in the city is not feasible due to requirement of separate distribution network and pumping requirement as all STPs are located down hill side.

1.7                                    Tariff Notification

Sewer connection and monthly sewerage charges for domestic and commercial are tabulated in Table 9.3.

Table  STYLEREF 1 \s 1. SEQ Table \* ARABIC \s 1 3  Tariff Notification of Sewerage

S. N.

Description

Commercial per Seat

Domestic per Seat

1

One Time Connection Charges – Non refundable

Rs. 800/-

Rs. 400/-

2

Monthly Charges

50% of Water billing per month

50% of Water billing per month

           

Though SMC has notified tariff for sewerage, it has not yet charged to the water users.

 

1.8                                    Issues and Aspects

·        Interconnectivity between old and new sewer system: The new sewerage system is connected to the STPs, whereas the connectivity between the old network and new sewerage network is not well established. This is due to lack of adequate information regarding the layout of old sewerage network. Even though, the present sewerage coverage as per records is 90% of Municipal Area, the amount of treatment is only 10% and remaining 90% goes untreated

Also, due to lack of connectivity of old network with transmission lines, requisite quantity of sewage does not reach the STPs and the STPs are not fully utilized to its design capacity

·        Absence of sewerage network coverage:  All the Special Areas including those recently included in Shimla Municipal Corporation like Dhalli, Tutu, New Shimla, and Special Areas of Ghanahatti, Kufri and Shoghi is surviving on private septic tanks for sewage disposal. No planned sewerage network has been provided in these areas

·        Revenue Loss: SMC is incurring revenue loss due to non-enforcement of sewerage tariff notifications. The loss is to the extent of Rs. 280 Lakhs

 


 

1.9                                    Vision and Goals

Text Box: “To Achieve Environmentally Sustainable Recycling-Oriented Waste Water Management”

 

 

 

 

Description

2006*

2011**

2016

2021

% of Population covered

80

90

95

100

% of Area covered

90

95

100

100

% of Sewage treated

10

50

100

100

% of reuse of treated waste water

0

10

25

50

* Shimla Municipal Area, ** Shimla Planning Area

 

1.10                                Strategy and Identification of Interventions

Considering existing issues and available data on the sewerage, to achieve the sewerage disposal vision for Shimla City, following are the strategies recommended for Integrated Sewerage Disposal Project for Shimla Planning Area.

Rehabilitation of sewerage network

The rehabilitation of sewerage network including main line is required in order to prevent leakages and providing linkages to the new network and main transmission line leading to STPs

Augmentation of sewerage network for areas of Dhalli, Tutu, New Shimla and Special Areas of Ghanahatti, Kufri and Shoghi

Provision of new sewerage network for the areas of Dhalli, Tutu, New Shimla and Special Areas of Ghanahatti, Kufri and Shoghi should be done. This shall include construction of 7 STPs to serve the proposed sewerage network.  I&PH department has prepared a preliminary project report for provision of new sewerage network

Enforcement of tariff notification on sewerage

SMC is losing revenue of Rs. 280 Lakhs annually due to non-enforcement of sewerage charges on user. It is recommended that the same should be made applicable in line with reform requirement


 

 

1.11                                Sectoral Investment Plan

(in Rs. Lakhs)

S.N

Project

Total Cost

2007

2008

2009

2010

2011

2012

1

Technical Studies: Master Plans and DPRs

 200.00

20

50 

50 

50 

30 

-

2

Rehabilitation of the main sewerage network

4899

500

1000

2000 

1399 

-

3

Provision of sewerage network for areas of Dhalli, Tutu, New Shimla and special areas of Ghanahatti, Kufri and Shoghi

12180

1218

4872

4854

1236

-

4

Provision of missing links to connect the refurbished old sewerage network with new sewerage network.

576

100

300 

176 

-

 

Total

17856

620

2568

7098

6303

1266

-

 


 

1.12                                Project Information Sheets

 

Project Title: Rehabilitation of Sewerage Network

 

Project Description: The project shall involve rehabilitation of main sewerage network secondary network within MC area and providing interconnectivity between old and new network

 

Project Benefits:

o        Reduces leakage

o        Improves environmental and hygienic conditions

o        Improves connectivity

o        STPs receives the requisite sewage

o        Stops contamination of open nallahs

o        Removes leakage and stagnation

o        Improves the health indicators  

 

Project Cost: Rs. 5475.35 Lakhs

 

Revenue Sources: Sewerage user charges collected by SMC

 

Implementation Structure: I&PH/SMC shall be responsible for the execution of the required works through EPC contract.

 

Financing Mechanism: Capital cost to be financed by I&PH/SMC using funds to be raised through grant under JNNURM; O&M cost may be recovered from recovery sewerage charges & property tax

 

Time Frame: Project Development : 2006 ; Implementation : 2007-2010

 

Institutional Responsibility: I&PH and SMC

 

Preparatory Activity for Implementation:

Preparation of Detailed Project Report

 

Related Programme, Plan and Policies:

Enforcement of sewerage tariff notification

 

Additional Studies:

Comprehensive Master Plan for sewerage system of SPA

 

 


 

 

Project Title: Augmentation of sewerage network in Dhalli, Tutu, New Shimla and Special Areas of Ghanahatti, Kufri and Shoghi Areas

 

Project Description: The Special Areas and other left out areas, which has no sewerage connection, shall be provided with new network taking into considerations existing and future demand with proper planning tools 

 

Project Benefits:

Expansion of population coverage of sewerage

Better environmental and hygienic conditions

 

Project Cost: Rs. 12180.30 Lakhs

 

Revenue Sources: New sewer connection charges and user charges to be collected by SMC and SADAs

 

Implementation Structure: I&PH/SMC shall be responsible for execution of required works through EPC contract. O&M of STPs may be through private sector participation on O&M contract

 

Financing Mechanism: Capital cost to be financed by I&PH using funds to be raised through grant under JNNURM; O&M cost to be recovered from sewerage charges and property tax

 

Time Frame: Project Development : 2007 Implementation 2008-2011

 

Institutional Responsibility: SMC and I&PH department

 

Preparatory Activity for Implementation:

 Project development including preparation of Detailed Project Report and induction of private sector

 

Related Programme, Plan and Policies:

Enforcement of sewerage tariff notification

 

Additional Studies: Comprehensive Master Plan for sewerage system of Shimla Planning Area