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BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
Middle Drain
Figure 8.2 Location of Main Drains in the Vicinity of the Development Site
8.27 Middle Drain flows towards the north east and discharges into the Humber Estuary via a pumping
station and outfall, approximately 1 km from the proposed acetylene facility. Sluice gates and the
pumping station prevent the tide moving upstream towards the site. Thus, during high tides, the
drain is discharged via a pumping station, with free drainage during ebb tides.
8.28 Middle Drain is maintained by NELDB. It is assumed that all surface water runoff eventually drains
into Middle Drain, either through existing land drainage, perched groundwater or sub-surface flow.
8.29 As water quality data are not available for the Middle Drain, a quantitative baseline water quality
description cannot be provided for this watercourse.
8.30 Five consents to discharge to surface water are reported within 1 km 9 of the development site.
Four of these are for discharges into Middle Drain and one discharge is to a tributary of the Middle
Drain. Of these five discharges, three are classed as ‘Sewage Discharges Final/Treated Effluent
Not Water Company’, one as ‘Trade Discharge Process Water’ and one as ‘Discharge of Other
Matter Surface Water’. Four of the discharge consents (sewerage, trade and other discharges) are
held by BOC for the existing site. The other consent is for Katoen Natie, a logistics company,
(NGR 522263, 413652) to discharge treated sewage.
8.31 Data searches have not identified any current, licensed surface water abstractions within 1 km of
the development site.
5100935.404 Environmental Statement August 2011 116