A1(T) Elkesley Junction Improvements - Highways Agency

Table 12.5: Water Framework Directive Assessment Results for the River Poulter from MillBrook to River MaunBiological QualityPhysico Chemical QualitySpecific Pollutants QualityProtected AreaPoint Source PollutionDiffuse Source PollutionCombined Source Sanitary RiskCombined Source Nutrients RiskWater Abstraction & FlowRegulationPhysical or MorphologicalAlterationAlien SpeciesSource: Environment AgencyOverall - ModerateFish - ModerateMacro-invertebrates – GoodOverall – ModerateAmmonia – HighDissolved Oxygen – HighpH – BadPhosphorus – PoorOverall – HighAmmonia – HighCopper – HighZinc – HighOverall - YesFreshwater Fish Directive – YesNitrates Directive - YesOverall - No riskOverall - High RiskSediment (High Risk),Pesticides and Phosphorous from agriculture(Moderate Risk)Urbanisation (Low Risk)Overall – High RiskAmmonia – No RiskBiochemical Oxygen Demand – High RiskOverall - High RiskTotal Oxidised Nitrogen – High RiskPhosphorous – High RiskOverall - High RiskOverall - Low RiskOverall - Low RiskFlood RiskThe scheme is located within an area with a 1-in-1000 year annual risk of flooding orless (Flood Zone 1).Groundwater/HydrogeologyThe development is situated over a solid geology comprising Sherwood Sandstonesand pebble beds over Lower Mottled Sandstone and Upper Permian Marl,Magnesian Limestone and Coal Measures. The overlying drift deposits arepermeable as demonstrated through a series of soakaway tests reported in AppendixB.Three groundwater vulnerability zones are located in and around Elkesley; a MajorAquifer of high vulnerability (which includes the proposed development site), a MajorAquifer of low vulnerability and a Minor Aquifer of low vulnerability. Abstractions fromthese groundwaters are protected; the works located within the total catchment of asource protection zone (SPZ) (Figure 12.1).99