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Promenādes iela 1a, Jūrmala, LV-2015


Stage I

          

Goals

A detailed analysis of the future development of water engineering was performed during the preparation of the technical and economic substantiation in year 2000. The overall goal was supply of high quality water to the consumers as well as collection and treatment of wastewater without polluting surface and underground water and in compliance with the requirements established in the national and EU regulatory documents. These policy targets have not changed and are still valid.

The following project targets have been set:

       Assurance of a higher level, accessibility and reliability of water engineering services through renovation of the existing pipelines and construction of new ones.

       Improvement of the quality of drinking water.

       Reduction of the environmental impacts of the pollution caused by wastewater through improvement of the quality of wastewater treatment plants and connection of new subscribers to the centralised wastewater drainage network.

       Increase of the efficiency of the operation of the water supply and wastewater sewage network through reduction of drinking water leakages in the pipeline system, preclusion of infiltration of groundwater in the wastewater collection network, increase of the power-efficiency of the production systems, and automation of the production processes;

Project Stages

No.

Stages

Period

Status

1

Feasibility study for the first stage:

-          Technical and economic substantiation.

1999. – 2000.

Implemented

2

Stage I of the Project:

-          Designing;

-          Construction work;

-          Commissioning.

2001. – 2009.

Implemented

3

Feasibility study for the second stage:

-          Technical and economic substantiation.

2007. – 2008.

Implemented

4

Stage II of the Project:

-          Designing;

-          Construction work;

-          Commissioning.

2009. – 2013.

Construction work commenced

 

Feasibility Study for years 1999 – 2000

 In 1999, Jūrmala City Council, in collaboration with the Ministry of Environment and limited liability company „Jūrmalas ūdens”, commenced the preparation of a water engineering project by using the required technical assistance and investments from local and international sources.  In year 2000, as part of the technical and economic substantiation, a long-term investment program for the period till year 2012 was developed for the water engineering in Jūrmala.
Based on an analysis of the current situation and a comparison of several development alternatives, the water supply and wastewater sewage system development plan to be implemented was established. Due to the limited funding, priority project components were established and included in the first stage of the project.

   

 

Work completed during Stage I of the Project

No.

Title of Agreement

Description

Supplier

Agreed amount, EUR

Implementation period

1

Construction of a new plant for removal of iron from drinking water at Kauguri

Iron removal plant with capacity 1,750 million m3/year – max. 415 m3/hour; 6500 m3/24 hours, second elevation pump station with capacity 470 m3/hour, clean water reservoir with volume 1200 m3, three new water wells, non-purified water collection pipe from well-field and treated water line with a connection to the municipal network.

JSCo „Merko Ehitus”

1 585 923,26

21.10.2004. – 16.11.2006.

2

Construction of a new wastewater treatment plant at Sloka

Treatment plant with capacity 9,050 m3/24 hours.

YIT Construction Ltd.

6 424 000,58

12.04.2005. – 30.03.2009.

3

Renovation, flushing and CCTV inspection of sewerage pipelines in Jūrmala

Renovation of 4.4 km of gravity flow sewerage pipelines, flushing and CCTV inspection of 64 km of pipelines.

General partnership „NBSJ”

3 370 795,44

27.12.2005. – 29.03.2007.

4

Restoration and widening of Jūrmala water engineering system

Included construction of a water pipeline and reconstruction of the existing pipelines at Pumpuri – Jaundubulti and Lielupe – Dzintari, construction of a sewerage pressure pipeline with a pump station at Tūristu iela – Jaunķemeri road, construction of a water pipeline and sewerage network at Sloka, reconstruction of the water tower and iron removal plant at Dzintari, reconstruction of an iron removal plant and construction of second-elevation pumping station with reservoirs at Dubulti, reconstruction of the sewerage pump station at Apes, Upes and Sēravota streets, and reconstruction of Ķemeri water tower.

General partnership „O.A.S. būve”

9 335 911,00

27.04.2006. – 29.02.2008.

 

An overall evaluation of the correspondence of the results achieved during Stage I to the initially set targets shows that they have been achieved entirely and even exceeded in some components. The results of the program have improved the compliance of the water engineering services of Jūrmala with the requirements established in the applicable EU directives, national regulatory acts, and the fundamental concepts established in the municipal strategic planning documents. 
In addition to the initially planned items, all sewerage lines with diameter exceeding 200 mm were TV-inspected in Jūrmala to obtain detailed information about their technical condition and plan the further renovation work. These data have been used to draw up the list of pipelines to be renovated during Stage II. The water tower of Dzintari, which was not initially included in the technical and economic substantiation as a Stage II priority, was also renovated.

The most essential improvement to the wastewater system is the closure of Ķemeri wastewater treatment plant and channelling of its wastewater to the newly constructed Sloka wastewater treatment plant. Additional connections to the sewerage system have been provided to the population of Sloka area. The strategically most significant pump stations which transfer most of the wastewater to Sloka wastewater treatment plant have also been reconstructed to increase their power efficiency. The reconstruction of the weakest points in the sewerage network eliminated potential damage to the municipal road infrastructure, reduced infiltration, and thereby also the volumes of wastewater to be treated and the costs of treatment. The TV–inspection of gravity sewerage pipelines improved their throughput.

Fulfilment of the physical indicators

The fulfilment of the physical indicators included in the Project is included in the following table:

No.

Physical indicator

Unit

Project estimate

Implemented within the project

1

New artesian wells

pcs.

3

3

2

New plant for removal of iron from drinking water

pcs.

1

1

3

Drinking water iron removal plant

pcs.

2

2

4

Reconstruction of water tower

pcs.

2

2

5

Widening of water supply system

km

10,7

13,6

6

Construction of a new wastewater treatment plant

pcs.

1

1

7

Reconstruction of sewerage pump station

pcs.

3

3

8

Construction of new sewerage pump station

pcs.

1

1

9

Renovation of sewerage pipelines

km

4,4

4,4

10

Flushing of sewerage pipelines

km

64

64

11

Widening of sewerage system

km

6,6

6,9

 

The work completed within the first stage of the project have resulted in an improved quality of drinking water, higher levels of reliability of the supply of drinking water, and sustainably stable water supply to the largest parts of the municipal water supply system. Kauguri and Sloka water supply systems were merged during the project. The pipeline system was reconstructed, including improvement of the quality of drinking water at the consumer’s, reduction of water losses in the system, and increase of the reliability of the system.

Funding 


The total funding of the first stage of the project was more than 25 million Euro, and this amount was divided into 2 parts – the attributable and the non-attributable costs. The attributable costs were the part of the project which was co-financed from the European Union Cohesion Fund in the volume of 75%. To cover the non-attributable costs, other international and local donation and loan financial sources were attracted. The listing of all financers is the following: European Union Cohesion Fund, state budget, Environment Protection Fund, Swedish International Development Agency (SIDA), Nordic Environment Finance Corporation (NEFCO) donation and loan (borrower - LLC „Jūrmalas ūdens”), European Investment Bank (borrower - LLC „Jūrmalas ūdens”), Jūrmala City Council, LLC „Jūrmalas ūdens”.

Compliance with the European Union directives

The current water engineering system of Jūrmala City still does not meet all the requirements established in the EU directives, national regulatory acts and standards because:

1.     Only 75% of the population can use the centralised water supply system services. The rest of the population use shallow wells which are subject to pollution caused by surface water, and therefore the quality of water in these sources is unknown. The pipeline system needs to be widened to provide the non-connected municipal areas with quality drinking water;

2.     Only 74% of the population can use the centralised wastewater collection and treatment services. The part of the population who do not use the centralised system dispose of their wastewater in pits which can be emptied. The quality of such pits is not always appropriate, and, for this reason, there are risks of underground water pollution. The pipeline system needs to be widened to assure that the non-connected areas of the city can use the services;

3.     Due to hydrogen sulphide corrosion and inappropriately selected pipeline materials, the condition of the existing sewerage pipeline system creates increased operating expenses and causes unnecessary power consumption during transfer and treatment of infiltration water as well as consumption of other resources. Rehabilitation of the sewerage pipeline system is required;

4.     The structural elements of several sewerage pump stations are in a poor condition, and this reduces the reliability of the pump station and increases power consumption and consumption of other resources. Rehabilitation of such structural elements of the pump station is required;

5.     After the implementation of the first stage of the project, the quality of drinking water meets the requirements only partly because of the increased content of sulphates. Further improvement of the process of preparation of water is required;

6.     Although water is treated at the iron removal plants in accordance with the requirements, it does not always meet the established requirements at the consumer’s. Deterioration of water in the pipeline system is caused by corrosion of the older parts of the system. Reconstruction of some parts of the water supply system is required;

7.     The unused artesian wells are not plugged, and, therefore, there is a risk of wastewater pollution.

Feasibility study 2007 – 2008

Since the second stage of the project included in the technical and economic substantiation prepared in year 2000 is still topical and corresponds to the current situation as well as the future development needs, this feasibility study did not include development and comparison of new development alternatives. Basically, the second stage of the project was updated and the properties of the project components were re-calculated in line with the current levels of consumption and their updated estimates. The technical and economic substantiation has been supplemented with such new components as a second parallel sewerage pressure line from Lielupe to Riga, which will increase the reliability of wastewater transfer, plugging of unused boreholes, and procurement of system operation technology.


 
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