Criteria Analysis Magnitude or severity of an impact: Critical Spatial extent : medium scale Duration: short term for construction , long term for operation Reversibility (shocks and vibrations during construction) ; irreversible (ground movements) Probability of occurrence medium in the absence of geotechnical investigation on new alignment Confidence in the impact prediction: medium to highSignificance of Predicted Impacts without mitigation The impact is considered as major adverse

floodingDesk Review of Available Data and Site VisitFindings: Possible Change to flows in water course and drains. Construction of structure within the bed of the existing channels will affect the flow and perhaps cause accumulation of debris. Criteria Analysis Magnitude or severity of an impact: Critical Spatial extent: large scale and upstream Duration: intermediate until mitigation measures are in operation (construction and operation) Reversible Probability of occurrence (rainy season) recurrent Confidence in the impact prediction highSignificance of Predicted Impacts without mitigation The impact is considered as major adverse

Magnitude or severity of an impact: Critical Spatial extent : medium scale Duration: short term for construction , long term for operation Reversibility (shocks and vibrations during construction) ; irreversible (ground movements) Probability of occurrence medium in the absence of geotechnical investigation on new alignment Confidence in the impact prediction: medium to highSignificance of Predicted Impacts without mitigation The impact is considered as major adverse

floodingDesk Review of Available Data and Site VisitFindings: Possible Change to flows in water course and drains. Concentration of surface run off at discharge outlets if natural drainage path blocked by embankment or structural support Storm water outlets from new overhead structure to be channelled properly to avoid accumulation on road below. Criteria Analysis Magnitude or severity of an impact: Critical Spatial extent: large scale and upstream Duration: intermediate until mitigation measures are in operation (construction and operation) Reversible Probability of occurrence (rainy season) recurrent Confidence in the impact prediction highSignificance of Predicted Impacts without mitigation The impact is considered as Moderate adverse to Critical if junction at exit into Champs de Mars and entrance into Boulvard Victoria is not designed properly.