Rose Conway-Walsh (Mayo, Sinn Fein)
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155. To ask the Minister for Public Expenditure and Reform the agency, authority or public body responsible for the maintenance of each river and lake in County Mayo in tabular form. [11365/20]

Kevin Moran (Longford-Westmeath, Independent)
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The Office of Public Works (OPW) is responsible for the maintenance of Arterial Drainage Schemes and catchment drainage schemes designated under the Arterial Drainage Acts of 1945 and 1995. 

The following link shows the catchment drainage schemes that the OPW are responsible for.

Maintenance of all drainage schemes carried out under earlier Acts, known as Drainage Districts, is the responsibility of the relevant Local Authority.

There are also other public bodies including Inland Fisheries Ireland and Waterways Ireland that may have a role in maintenance.

The maintenance of the majority of the remaining rivers and lakes in Mayo is the direct responsibility of land owners.