Newlands Cross Upgrade EIS - European Investment Bank

South Dublin County Council N7 Newlands Cross Upgrade
Environmental Impact Statement
Arup Consulting Engineers
that the predicted maximum expected levels (i.e. at 10m from constructions works) are
expected to occur for only short periods of time at a very limited number of properties.
Furthermore, given that current traffic noise levels are typically of the order of the maximum
expected values for construction activities, it is anticipated that these activities will not be
excessively intrusive.
Table 3.6: Construction Noise Levels at Stated Distances
Item of Plant (BS5228 Ref.)
Highest predicted noise level at stated distance from edge of works
(dB LAeq(1hr))
10m 20m 40m 60m 100m
Rock breaker (C.2.11) 81 75 69 65 61
Breaking Road Surface (C.8.12) 72 66 60 56 52
Wheeled loader (C.3.51)* 68 62 56 52 48
Tracked excavator (C.3.43)* 69 63 57 53 49
Dozer (C.3.30)* 70 64 58 54 50
Dump truck (C.3.60)* 66 60 54 50 46
Vibratory roller (C.3.116) 72 66 60 56 52
Asphalt Spread (C.8.24) 76 70 64 60 56
Diesel Hoist (C.7.98) 70 64 58 54 50
Compressor (C.7.27) 67 61 55 51 47
Generator (C.7.49) 71 65 59 55 51
Road Roller (C.3.114) 74 68 62 58 54
HGV Movements (20 per hour) 59 56 53 52 49
*Assume noise control measures as outlined in Table B1 of BS 5228 Part 1 i.e. fit acoustic exhaust
Because of the nature of the works and the necessity to keep the Newlands Cross junction
(which is among the busiest in Ireland) operational during the day, there will be occasions
when the NRA noise guidance limits may be exceeded. Mitigation measures will be
incorporated into the Contract documents to reduce the impact of construction noise at
sensitive receptors.
Regardless of the final choice of the road configuration, mitigation measures will be necessary
to limit construction noise levels to these values.
3.9.5.3 Mitigation Measures for Options 1 and 2
The contractor will be required to develop and agree the following documents relating to the
control of noise and vibration prior to the commencement of construction activities:
• The ‘Noise and Vibration Management Plan’ (forming part of the General Environment
Plan and dealing specifically with noise and vibration monitoring), and;
• The ‘Plan for Control of Noise and Vibration’ which will be part of the Method Statement
for each area of the Works.
The former will deal with procedures for construction noise monitoring and reporting,
whereas the latter will contain a detailed appraisal of construction noise generation and
control. The contractor will be obliged to present noise predictions for all relevant activities
for comparison with the construction noise limits.
Where it is anticipated that construction noise levels may exceed the limits, or activities may
occur outside the periods for which the NRA have recommended any such limits, the
contractor will be obliged to present clear justification and details of mitigation measures
December 2007 Page 32