|The Second New Kelani Bridge Project
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|Author:||Saman [ Sun Oct 13, 2013 6:12 pm ]|
|Post subject:||The Second New Kelani Bridge Project|
The Second New Kelani Bridge Project
Extracts from the project report / Aug 2013 / @RDA
With the operation of Colombo – Katunayake Expressway (CKE) it is anticipated that the traffic flow into the Colombo city through the NewKelani bridge will be increased. The present traffic arrangement in and around the New Kelani bridge will not be able to cater to this traffic and in turn it may also affect the life span of the existing bridge.
Therefore Road Development Authority (RDA) of the Ministry of Ports and Highways (MoPH) initiated a study with the assistance from the Government of Japan to improve the traffic condition around the New Kelani Bridge.
The objective of the project is to increase the transport efficiency in the environs of New Kelani Bridge and to establish the nexus between CKE and the city transport network. The project is named as The Second New Kelani Bridge Project –A Project for Traffic Improvement around Existing Kelani Bridge.
The project is located in Colombo and Gampaha districts covering the District Secretaries’ (DS) administrative areas of Colombo, Kolonnawa and Kelaniya. Respective GN divisions are Navagampura, Bloemandhal and Grandpass North in Clombo, Wadullawatte Orugodawatte and Sedawatte in Kolonnawa and Peliyagoda and Gangabada East in Kelaniya. Local Government bodies which cover the project area are Colombo Municipal Council, Kolonnawa Urban Council and Peliyagoda Pradeshiya Sabha.
The study is based on desk studies, field studies, stakeholder meetings and household surveys to obtain relevant latest field data and to assess project impacts on the Physical, Physio-chemical, biological and Social environments. The report conforms to the ToR issued by CEA.Various project alternatives were considered. “No Project Alternative” was compared against possible project alternative. If no auxiliary bridge is constructed across the Kelani River close to the “New Kelani Bridge” as proposed, the existing bridge will not be able to cater to the increased traffic flow in and out of Colombo city, increasing the traffic congestion within the project area. The additional traffic load onto the existing New Kelani Bridge will reduce its life span as a result.
Four layout alternatives have been considered during the feasibility studies. In these alternative layouts location alternative for the placing of the main bridge was also considered and it was concluded that it is best to construct a new bridge parallel to the existing bridge. Various bridgetypes, ramp arrangements, interchange arrangements have also been selected as construction alternatives. These alternatives have been evaluated under various aspects. The result of such comparison shows that Alternative-B is determined to be optimal in terms of cost, environmental impact, traffic congestion, construction ease, water quality impacts etc.
Standard construction techniques in road and bridge construction will be employed in construction and most of the construction work will be machine based. There will also be some manual construction work such as form work, assembling reinforcements, welding, providing finishes, lane marking etc. There will not be any piers for the proposed six lane main bridge across the Kelani River in the waterway.
The project is still in the feasibility level and construction work will go on for a period of 36 months commencing 2017.The total construction cost including land acquisition, taxes and administration costs will be approximately Rs.60.9 billion. Funding will be provided by the Government of Japan under JICA funding.
Topography of the area consists of relatively flat terrain which consists of flood plain areas and slightly elevated areas of high urban character. Main land use types are water bodies, marshy land, parks and urban built up areas.
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