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Padma Multipurpose Bridge Project

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Annex 4-2: Impact Assessment MatrixEnvironmental Components<strong>Project</strong> Activities in Different Phases1. Topography 2. Top Soil/Bed Material 3. River Flow 4. Drainage 5. Erosion/ScourInteractionWeightageDegree of ImpactShort TermLong TermPartly MitigableFully MitigableComposite Rating ValeImpact ValueInteractionWeightageDegree of ImpactShort TermLong TermPartly MitigableFully MitigableComposite Rating ValeImpact ValueInteractionWeightageDegree of ImpactShort TermLong TermPartly MitigableFully MitigableComposite Rating ValeImpact ValueInteractionWeightageDegree of ImpactShort TermLong TermPartly MitigableFully MitigableComposite Rating ValeImpact ValueInteractionWeightageDegree of ImpactShort TermLong TermPartly MitigableFully MitigableComposite Rating ValeImpact ValueApproach roadsMobilization of equipments, constructionmaterials/ vehiclesClearing of sitesRemoving of top soils √ 3 -3 √ √ -2 -6 √ 4 -1 √ √ -1 -4Earth filling and compaction for road √ 2 -1 √ √ -1 -2 √ 3 2 √ 2 6 √ 3 -3 √ √ -2 -6 √ 4 -1 √ √ -1 -4embankmentBlack carpeting (bituminous carpet) √ 2 -1 √ √ -1 -2 √ 3Construction of road structures √ 2 -1 √ √ -1 -2 √ 3 -1 √ √ -1 -3 √ 3 -3 √ √ -2 -6 √ 4 -1 √ √ -1 -4Waste disposalProvision for Approach railsMobilization of equipments, constructionmaterials/ vehiclesClearing of sitesRemoving of top soils √ 3 -3 √ √ -2 -6 √ 4 -1 √ √ -1 -4Earth filling and compaction for road √ 2 -2 √ √ -2 -4 √ 3 1 √ 1 3 √ 3 -3 √ √ -2 -6 √ 4 -1 √ √ -1 -4embankmentPlacing sleepers, crushed rocks, rails etc.Construction of railway viaducts √ 2 -1 √ √ -1 -2 √ 3 -1 √ √ -1 -3Construction of rail stations √ 2 -2 √ √ -2 -4Waste disposal<strong>Bridge</strong> end facilitiesMobilization of equipments, constructionmaterials/ vehiclesClearing of sitesRemoving of top soils √ 3 -2 √ √ -1 -3 √ 4 -1 √ √ -1 -4Earth filling and compaction √ 2 -1 √ √ -1 -2 √ 3 1 √ 1 3 √ 4 -1 √ √ -1 -4Development of superstructureWaste disposal<strong>Padma</strong> <strong>Multipurpose</strong> <strong>Bridge</strong> Design <strong>Project</strong>Final Report (Environmental Action Plan)Environmental Impact Assessment ReportApril 30, 2010A4.2-2

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