Report

The Woodsmith Project - S73 Project Amendments : Planning Statement

To accommodate these amendments, the toe of the inner face of Bund F has been moved to the north and east, and the inner face has been steepened to a 1:1 strengthened embankment (reinforced soil slope). The outer face of Bund F will generally be at a 1:5 gradient, with isolated sections at 1:4. Bund F has been extended to the south to provide continuous screening, and the access road to the ponds will be realigned to the south of Bund F. The reconfiguration of Bund F and the reduction in development at the southern end of the site means the required screening can be achieved without the construction of Bunds D and E. Bund C has been reconfigured to provide screening of lights from the gatehouse, HGV reception area and access road from views along the B1416, while tying into original contours and restoring habitat for biodiversity enhancement and promoting sustainable surface water drainage.

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Surface Water Drainage

While an updated surface water drainage design is provided as part of this application, there is no proposed change to the water management principles and practices that have been applied at Woodsmith Mine throughout construction and as approved under NYM/2017/0505/MEIA. Surface water runoff will continue to be directed to the existing attenuation ponds via a series of oil water separators, filter drains and swales with check dams and carrier pipes. Two additional ponds will be constructed in the south of the site. The water treatment building and plant installed under Phase 7 of NYM/2017/0505/MEIA will remain in use. The water treatment building has been in place for several years, is of an agricultural design, sensitive to its settings and well screened from external views. An alternative approach to retaining the building would be to hire in mobile kit during periods of poor weather but, given the need for this to be undertaken externally, would give rise to additional noise and light impacts.

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Fire & Wastewater Storage Tanks

The existing four fire and process water tanks will be retained. Two additional water storage tanks with a combined capacity of 1,242m3 will be used for the supply for fire (530m3 reserved volume) and service water for both above ground and underground mining facilities during construction. These facilities are required to ensure the safe and efficient operation of the mine and have been designed to be as recessive as practically possible, notwithstanding their required volumes.

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HGV Movements

Peak daily movements of HGVs during the construction and operation phases are anticipated to be: • c.140 two-way HGV movements per day during construction (i.e. a slight increase compared to current permitted level of 126);

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