Flooding at Floods Cross outside Naas on Wednesday, November 23
Kildare County Council has issued a strong defence of its performance in flood alleviation works.
In statements issued last week and yesterday, the Council outlined where work had been done in the past and had proven resilient in the face of the heavy rain last Tuesday night.
A spokesperson expanded: “Everywhere we’ve done work, it has worked.
“We constantly monitor rainfall and flooding throughout the county on an ongoing basis.”
In the statement the council pointed out that “Kildare County Council has invested in the building of flood alleviation schemes in the past number of years.
“The Council found during last week’s impending heavy rainfall that all works contained the floods.”
Referencing Johnstown Bridge, they noted that while river levels were very high there was no flooding, adding that it was all contained within the walls and embankments.
In Sallins, in particular the Waterways, there was no flooding “while there was very large and fast flows of water but it was all contained within the Council’s works”.
Referring to the Butterstream in Clane there was “no flooding where the Council did works.
“There was flooding at the nursing home on the Prosperous Road, but that was upstream and due to the Home’s pipework/ culverting works.”
Referring to Vanessa Lawns in Celbridge where work has been carried out in the past, the council noted that there was no flooding and high flows were all contained within Council’s works”.
There was no flooding in Ardclough and “high flows were all contained and diverted away from properties that previously flooded”.
In Newtown, near Kilcock, which had previously been the scene of considerable flooding and a lot of work by the council, there were no reports of flooding.
That same is the case in Leixlip and Confey.
The Council also took the somewhat unusual step of releasing a report carried out by a consultant in the immediate aftermath of the flooding in Dara Park and Lakeside Crescent.
Compiled by Donnachadh O’Brien and Associates Consulting Engineers, the report notes that the flooding occured on the morning of November 23 “following a severe rainfall event with 45-50mm of rainfall, most of which fell over a 6 hour period.
The flooding was caused by debris blocking a trash screen located in a property next to Dara Park owned by Irish Rail.
The trash screen was protected a culvert that went under the railway line where rainwater from the entirety of Dara Park and Lakeside Park flows into.
As a result of the blockages, which were made up of a leaves, twigs and a discarded fire extinguisher, the culvert capacity was down to 25%.
The consultant explained that once the blockage had been cleared there was an immediate increase in water going through the culvert and a corresponding drop in the flooding - to such a degree that within a matter of hours it had receded almost entirely.
Referring to recently completed Dara Park Surface Water Scheme, the consultant said that if the culvert had been free from debris and blockages, “it is our opinion that no road flooding would have occurred within Dara Park and Lakeside Crescent”.
It was his belief that the “Dara Park Surface Water Improvement Works are operating as designed”.
The Dara Park Surface Water Scheme was to alleviate flooding from the storm water system and not the foul water system, according to Mr Boland who was responding to claims that the scheme had not worked to prevent the flooding.
“Both of these systems consist of totally separate pipe networks with the foul network in the area unfortunately compromised by improper and legacy surface water connections being made to it.”
Kildare County Council says it now has an agreement with Irish Rail to prevent a repeat of the same problem.