12.—(1) The licence holder is permitted to carry out maintenance dredging at the following locations within the period specified in paragraph 14(3)—
(a)the berthing pocket to a depth of -11 metres Chart Datum;
(b)the approach channel to a depth of -9 metres Chart Datum;
(c)the turning area to a depth of -9 metres Chart Datum;
(d)the E.ON outfall to keep it free of siltation by means of plough dredging;
(e)the Centrica outfall to keep it free of siltation by means of plough dredging;
(f)the pumping station outfall to a depth of +2.0 metres Chart Datum; and
(g)the Cherry Cobb Sands breach to a depth of +3.0 metres Chart Datum.
(2) The dredging under sub-paragraph (1) may only be carried out for the purpose of—
(a)maintaining the authorised development;
(b)maintaining access to the authorised development;
(c)maintaining access to neighbouring developments; and
(d)removing siltation caused by the authorised development.
(3) The materials must be dredged in the approximate quantities and deposited at the locations according to the following table—
| Location | Material | Maximum tonnage per year | Deposit location | Total licensed tonnage |
|---|---|---|---|---|
| The berthing pocket | Sand | 150,000 | HU080 | 3,225,000 |
| Silt | 925,000 | |||
| The approach channel | Sand | 10,000 | HU080 | 150,000 |
| Silt | 40,000 | |||
| The turning area | Sand | 10,000 | HU080 | 150,000 |
| Silt | 40,000 | |||
| The E.ON outfall | Sand | 500 | None | 7,500 |
| Silt | 2,000 | |||
| The Centrica outfall | Sand | 500 | None | 7,500 |
| Silt | 2,000 | |||
| The pumping station outfall | Sand | 50 | HU080 | 300 |
| Silt | 50 |