A1(T) Elkesley Junction Improvements - Highways Agency
A1(T) Elkesley Junction Improvements - Highways Agency A1(T) Elkesley Junction Improvements - Highways Agency
In accordance with the WFD, the associated groundwater body (the Idle Torne) isconsidered to be at high risk and currently in poor quantitative and chemical conditionwith an upward trend chemical trend.Table 12.6: Soakaway Test ResultsTrial Pit Rate of InfiltrationSA1(T) 1.13 x 10 -5 ms -1SA2 1.78 x 10 -5 ms -1SA3 8.44 x 10 -6 ms -1SA4 1.13 x 10 -5 ms -1SA5 5.32 x 10 -6 ms -1Table 12.7: Water Framework Directive Assessment Results for the Idle Torne – PTSandstone Nottinghamshire and DoncasterQuantitative QualityProtected AreaPoint Source PollutionDiffuse Source PollutionWater Abstraction & FlowRegulationSource: Environment AgencyOverall - PoorGroundwater dependent terrestrial ecosystems - GoodImpact on surface waters – PoorSaline intrusion – GoodResource balance - PoorOverall - YesDrinking Water Protected Area - YesOverall – Low RiskOverall - High RiskMine and minewater - Low RiskPesticides - Moderate RiskPhosphorous - Moderate RiskUpward trend in Nitrate – High RiskUrbanisation - Moderate RiskCholrinated Solvents - Moderate RiskPriority Hazardous substance – Low RiskGroundwater dependent terrestrial ecosystemModerate RiskDrinking water protected areas – High RiskSaline intrusion – Low RiskOverall - High RiskImpact on surface water - Moderate RiskWater balance – High RiskTerrestrial Ecosystems – High RiskSaline intrusion – Low Risk12.5 Assessment of Environmental ImpactsConstruction Phase ImpactsThe hydrological aspects of the construction phase would be managed largelythrough drainage consents issued by the EA as applied for by the future contractor.The consents applications would be reviewed and accepted only if the proposals forthe site drainage are not expected to result in an unacceptable impact on waterresources, quality or flood risk. The contractor would also have to comply with therelevant aspects of the Water Resources Act (1991). Impacts would be temporary,lasting only for the duration of construction phase.100
The greatest potential remains the potential for the release of contaminants due toaccidental spillages and discharges and/or the inadequate storage and transfer ofmaterials during construction. Whilst the importance of such resources areconsidered moderate/high and the magnitude of the impact moderate/major adversethey are only likely to occur under accidental/extreme events therefore the impact israted low. Such impacts would be most intense during a ‘first-flush’ event after aheavy rainfall event post a dry-period. The same potential exists in relation to therelease of sediment loads during construction however given the distance to thenearest watercourse impacts are rated neutral.The potential for reduced inflation and increased runoff through ground compactioncaused during construction will be limited given the local surface watercharacteristics. For this reason this impact is rated neutral.Operational Phase ImpactsThe impact assessment has been made against Methods A, C and D.Pollution from Routine Runoff to WatercoursesDuring rainfall events, contaminants deposited on road surfaces are washed intoreceiving water where there may be a potential to harm the local environment.Previous studies have shown that roads with an annual average daily traffic (AADT)flow of less than 15,000 vehicles have only a very slight effect. The AADT for the newsection of road (the junction slips and roundabouts) in 2026 is between 1,300 and2,000 vehicles.Pollution from Routine Runoff to GroundwaterThe Method C calculations, based on working over a total catchment SPZ, indicatethat the groundwater has a medium risk of impact from pollutant runoff (see AppendixB5). Under such circumstances the use of pollution interceptors is recommendedshould the surface water runoff from the road be discharged to ground.Accidental Spillage RiskThe likely accidental spillage risks associated with the route was previouslycalculated in the Stage 2 EAR in accordance with the DMRB method. Thisdemonstrated that for each discreet drainage catchment covered by the proposedscheme the risk is below the critical 1% value.MitigationThe following design and mitigation measures have been committed to.Construction Phase MitigationTo mitigate the risk of accidental spillage, the works at site will be carried outfollowing the development of a Pollution Control Strategy prepared by the futurecontractor. The strategy will accord with EA guidelines such as PPG6. Guidance ongood site management practices contained within this document will be incorporatedinto the CEMP.101
- 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 and 80: identified receptors within the stu
- Page 81 and 82: presented are also based upon a 100
- 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: Table 12.5: Water Framework Directi
- 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
In accordance with the WFD, the associated groundwater body (the Idle Torne) isconsidered to be at high risk and currently in poor quantitative and chemical conditionwith an upward trend chemical trend.Table 12.6: Soakaway Test ResultsTrial Pit Rate of InfiltrationS<strong>A1</strong>(T) 1.13 x 10 -5 ms -1SA2 1.78 x 10 -5 ms -1SA3 8.44 x 10 -6 ms -1SA4 1.13 x 10 -5 ms -1SA5 5.32 x 10 -6 ms -1Table 12.7: Water Framework Directive Assessment Results for the Idle Torne – PTSandstone Nottinghamshire and DoncasterQuantitative QualityProtected AreaPoint Source PollutionDiffuse Source PollutionWater Abstraction & FlowRegulationSource: Environment <strong>Agency</strong>Overall - PoorGroundwater dependent terrestrial ecosystems - GoodImpact on surface waters – PoorSaline intrusion – GoodResource balance - PoorOverall - YesDrinking Water Protected Area - YesOverall – Low RiskOverall - High RiskMine and minewater - Low RiskPesticides - Moderate RiskPhosphorous - Moderate RiskUpward trend in Nitrate – High RiskUrbanisation - Moderate RiskCholrinated Solvents - Moderate RiskPriority Hazardous substance – Low RiskGroundwater dependent terrestrial ecosystemModerate RiskDrinking water protected areas – High RiskSaline intrusion – Low RiskOverall - High RiskImpact on surface water - Moderate RiskWater balance – High RiskTerrestrial Ecosystems – High RiskSaline intrusion – Low Risk12.5 Assessment of Environmental ImpactsConstruction Phase ImpactsThe hydrological aspects of the construction phase would be managed largelythrough drainage consents issued by the EA as applied for by the future contractor.The consents applications would be reviewed and accepted only if the proposals forthe site drainage are not expected to result in an unacceptable impact on waterresources, quality or flood risk. The contractor would also have to comply with therelevant aspects of the Water Resources Act (1991). Impacts would be temporary,lasting only for the duration of construction phase.100
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