Volume II - Kildare.ie
Volume II - Kildare.ie
Volume II - Kildare.ie
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9.17.5 MAINLINE CULVERTS<br />
N7 Naas Road Widening & Interchanges Scheme<br />
For the culverts under the mainline, only design options incorporating prefabricated<br />
elements were considered in order to minimise disruption to traffic and consequent<br />
user-delay costs. All the mainline culverts will be constructed on a similar line as the<br />
existing river channel and culverts.<br />
There are five new mainline culverts required:<br />
• Morell River Culvert, CH 18+10<br />
• Hartwell River Culvert, CH 25+50<br />
• Kill River Culvert, CH 44+80<br />
• Painstown River Culvert, CH 60+20<br />
• Slane River Culvert, CH 75+70<br />
Three options were considered to replace the existing culverts:<br />
Option A Twin precast concrete box culvert<br />
Option B Twin corrugated steel arch culverts<br />
Option C Twin precast concrete large diamter pipes<br />
9.17.5.1 Recommendation<br />
The design options were compared based on the criteria of:<br />
• Buildability within the constraints of the existing cross section;<br />
• Economic evaluation;<br />
• Aesthetic evaluation;<br />
From aesthetic and whole life cost evaluations, Option B has significant advantages over<br />
the other two options considered, and is recommended as the optimum structural<br />
design solution.<br />
Environmental Impact Statement 176<br />
June 2001<br />
<strong>Volume</strong> 2
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