A1(T) Elkesley Junction Improvements - Highways Agency
A1(T) Elkesley Junction Improvements - Highways Agency A1(T) Elkesley Junction Improvements - Highways Agency
VibrationSubjective observations were undertaken during the noise monitoring survey, whichindicated that there were no major sources of vibration in the vicinity of the proposedscheme. Therefore, neither baseline vibration monitoring nor a detailed assessmentof vibration would be required as the potential for vibration impact is deemed to beinsignificant.9.5 Potential ImpactsConstruction PhaseAt present, detailed information regarding construction phasing, timescales andprocesses on which to base a thorough assessment are not available. However, inorder to provide an indication of the potential impacts of this phase, qualitativeassessment of key construction activities typically associated with highwayconstruction works has been undertaken. Typically, the main stages of highwaysconstruction are as follows:• Top soil strip;• Bulk cuts;• Bulk fills;• Ground improvement layer; and• Laying of surface.Construction activities associated with developments of this type have the potential toresult in significant noise impacts dependent upon the proximity of existing sensitiveproperties, the need for significant earth moving and the use of ‘heavy’ plant andmachinery. The greatest impacts generally occur during the initial site establishmentstage when the ground is being prepared/excavated and the main infrastructure isbeing installed. Once this is complete, it is considered that general constructionactivities associated with the proposed scheme should give rise to lower noiseemissions.Increased noise may also result on the local road network due to an increasedvolume of HGV's travelling to and from the site during the construction programme(e.g. for import/export of raw materials, clean fill and waste). The potential effects ofthese sources on local receptors will be most significant in the vicinity of specificworks sites, which may change as development phases proceed.Given that exact details regarding construction techniques and types of plant likely tobe used are not available at present, it is difficult to predict accurately the potentialimpacts of construction noise on local receptors. Nevertheless, it is considereduseful to present potential worst-case noise levels from a selection of typicalconstruction plant, which may be used in a development such as this, and tocalculate noise levels back to different distances, which may reflect noise levels atlocal receptors. The noise levels calculated at distance from each item of plant donot take into account attenuation due to screening and have been based upon hardreflective ground between source and receiver as a worst-case scenario. The figures80
presented are also based upon a 100% ‘on’ time, which is unlikely to occur inpractice.Table 9.8 below presents details for plant which could reasonably be used during thedevelopment programme, with corresponding worst-case noise levels taken from BS5228.Table 9.8 – Potential Noise Levels of Construction PlantPlant Sound power Sound Pressure Level (dB LAeq)Level (dBLWA) 10m20m50m100m200m300mExcavators 118 90 84 76 70 64 60Dumper trucks 110 82 76 68 62 56 52Dozers 118 90 84 76 70 64 60Delivery lorries 105 77 71 63 57 51 47Concretedelivery lorry109 81 75 67 61 55 51Vibrating rollers 106 78 72 64 58 52 48Road roller (5km/h)101 73* 67* 59* 53* 47* 43**Drive by maximum sound pressure level, LpA (max), at speed in km/h shown in bracketsIt is considered that the potentially worst affected properties due to construction noisewould be those located directly adjacent to the new highway alignment, with lesserimpacts at those properties located further away and adjacent to the existing roadnetwork.Impacts to specific identified receptors during the construction phase are expected tobe relatively short-term in duration, although the exact duration over which impactsmight arise is not yet known.It is recommended that a range of good site practices, including ‘Best PracticableMeans’ (BS5228:1997), be adopted in order to mitigate against construction phasenoise and vibration impacts at local receptors. This will be undertaken in the form ofa Construction Environmental Management Plan (CEMP) which should includeprovision for a Temporary Traffic Management (TTM) plan. Examples of suchmeasures and techniques include:81
- Page 29 and 30: Table 4.3: Significance of Effects
- Page 31 and 32: Assessment of Environmental Effects
- Page 33 and 34: 5 Disruption Due to Construction5.1
- Page 35 and 36: 5.6 Residual EffectsDisruption duri
- Page 37 and 38: 7 Landscape Effects7.1 Assessment M
- Page 39 and 40: Table 7.1: Landscape Character Sens
- Page 41 and 42: Inclusion of an area within the vis
- Page 43 and 44: MagnitudeHighMediumLowNo ChangeDefi
- Page 45 and 46: • rolling landforms with numerous
- Page 47 and 48: associated with Jockey Lane forms a
- Page 49 and 50: • Properties along the High Stree
- Page 51 and 52: 7.5 Implication of New Lighting Pro
- Page 53 and 54: Area F: Enclosed Arable Farmland (G
- Page 55 and 56: Table 7.7: Summary of Impacts on Vi
- Page 57 and 58: Discussion of Impacts:Visual effect
- Page 59 and 60: • To optimise protection for resi
- Page 61 and 62: Detailed Mitigation ProposalsThe fo
- Page 63 and 64: 8 Land Use8.1 Findings at Stage 2 A
- Page 65 and 66: The frequency response of the human
- Page 67 and 68: oad traffic. It does not provide pr
- Page 69 and 70: The results of the Scoping Assessme
- Page 71 and 72: operations. If the total noise leve
- Page 73 and 74: Table 9.4 - Significance criteria o
- Page 75 and 76: noise levels are below 58 dB LA1(T)
- Page 77 and 78: climate for a typical day on the ex
- Page 79: identified receptors within the stu
- Page 83 and 84: Operational PhaseTable 9.9 and Tabl
- Page 85 and 86: Table 9.11 - Predicted noise levels
- Page 87 and 88: Table 9.14 - Predicted number of dw
- Page 89 and 90: Air-borne vibration is more common
- Page 91 and 92: 10 Pedestrians, Cyclists, Equestria
- Page 93 and 94: 12 Road Drainage and the Water Envi
- Page 95 and 96: LowAttribute with a low quality and
- Page 97 and 98: Table 12.3 Criteria for Estimating
- Page 99 and 100: Table 12.5: Water Framework Directi
- Page 101 and 102: The greatest potential remains the
- Page 103 and 104: 13 Geology and Soils13.1 Findings a
- Page 105 and 106: Annex 4Figure 4.1 - Constraints Map
- Page 107 and 108: Annex 9Figure 3.1 - 3.9: Noise Cont
- Page 109: Annex 12Figure 12.1 - Groundwater V
presented are also based upon a 100% ‘on’ time, which is unlikely to occur inpractice.Table 9.8 below presents details for plant which could reasonably be used during thedevelopment programme, with corresponding worst-case noise levels taken from BS5228.Table 9.8 – Potential Noise Levels of Construction PlantPlant Sound power Sound Pressure Level (dB LAeq)Level (dBLWA) 10m20m50m100m200m300mExcavators 118 90 84 76 70 64 60Dumper trucks 110 82 76 68 62 56 52Dozers 118 90 84 76 70 64 60Delivery lorries 105 77 71 63 57 51 47Concretedelivery lorry109 81 75 67 61 55 51Vibrating rollers 106 78 72 64 58 52 48Road roller (5km/h)101 73* 67* 59* 53* 47* 43**Drive by maximum sound pressure level, LpA (max), at speed in km/h shown in bracketsIt is considered that the potentially worst affected properties due to construction noisewould be those located directly adjacent to the new highway alignment, with lesserimpacts at those properties located further away and adjacent to the existing roadnetwork.Impacts to specific identified receptors during the construction phase are expected tobe relatively short-term in duration, although the exact duration over which impactsmight arise is not yet known.It is recommended that a range of good site practices, including ‘Best PracticableMeans’ (BS5228:1997), be adopted in order to mitigate against construction phasenoise and vibration impacts at local receptors. This will be undertaken in the form ofa Construction Environmental Management Plan (CEMP) which should includeprovision for a Temporary Traffic Management (TTM) plan. Examples of suchmeasures and techniques include:81
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