Bernard Durkan (Kildare North, Fine Gael)
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111. To ask the Minister for Public Expenditure and Reform if any study has been undertaken to determine the extent to which the River Liffey has become affected by silting, fallen trees and domestic debris resulting in impeded water flows and flooding; and if he will make a statement on the matter. [10029/14]

Brian Hayes (Dublin South West, Fine Gael)
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The Office of Public Works (OPW) with its technical consultants, is currently undertaking the Catchment Flood Risk Assessment and Management (CFRAM) Programme in partnership with local authorities and other stakeholders. This is a strategic approach that recognises the need, in line with international best practice, to move to a more sustainable, planned and risk-based approach to dealing with flooding problems. The CFRAM Studies are comprehensive catchment-based studies through which, following public consultation, detailed flood maps are produced and flood risk management measures are assessed and taken to outline design. These measures will be prioritised and set out in a Flood Risk Management Plan. More information on the Programme is available on .

The River Liffey is being assessed as part of the Eastern CFRAM study and the main trunk of the river from Poulaphouca down to the sea, through Dublin City, is being modelled, including a number of tributaries. The areas of significant flood risk, described within the Programme as Areas for Further Assessment (AFAs), along the main trunk which are being assessed in detail are Newbridge, Clane, Celbridge, Leixlip, Lucan to Chapelizod, and Dublin. Under the study the flood maps are based on the conditions in the river as surveyed, and so include the existing river bed levels. Culverts, etc, are modelled as unblocked (ie clear of debris). As part of the study, it is intended to undertake a high level screening exercise to identify culverts at high potential risk of blockage by debris. If silting or debris are determined to be contributory factors in increased flood risk on the river then this will be considered in the risk management plan produced under the CFRAM study. More information on the study is available on www.eastcframstudy.ie.