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There are currently no known outstanding effects for the Conwy Tunnel (Supplementary Powers) Act 1983, Cross Heading: Other subsidiary works and supplementary powers.
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4(1)The Secretary of State may carry out, in any manner and by any means appearing to him to be appropriate, such excavations, such dredging and dumping operations and such pumping operations as appear to him to be necessary or convenient for the purpose of—U.K.
(a)the principal works; or
(b)any works authorised by paragraph 1 or 2 above.
(2)The Secretary of State may carry out, in any manner and by any means appearing to him to be appropriate, such operations for the purpose of maintaining any channel or trench excavated or dredged in pursuance of this paragraph as appear to him to be necessary or convenient for that purpose.
(3)The Secretary of State may use, appropriate, store, deposit or dispose of any materials (including liquid) excavated, dredged or pumped in pursuance of this paragraph in any manner or by any means appearing to him to be appropriate.
5U.K.The Secretary of State may temporarily alter, interfere with, occupy or use the banks, bed and foreshores of the Estuary in any manner and to any extent appearing to him to be necessary or convenient for the purpose of—
(a)the principal works; or
(b)any works authorised by paragraph 1 or 2 above.
6U.K.The Secretary of State may obstruct navigation to any extent appearing to him to be necessary or convenient for the purpose of—
(a)the principal works; or
(b)any works authorised by paragraph 1 or 2 above; or
(c)any other works or action authorised by any of the preceding provisions of this Schedule.
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