In reclamation involving large volumes of fill and tight programme, shall engineers use marine fill or mud extracted from land borrow area as filling material?

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There are two advantages of adopting marine fill over mud extracted from land borrow area:

(i) In some land borrow areas, it involves breaking up of rock to suitable sizes for reclamation and the production rate is not high. With modern equipment for dredging and placing marine fill, the filling rate is much higher.

(ii) The cost incurred for breaking up of rock to suitable sizes for reclamation is very expensive while the cost of hydraulic filling with marine fill is lower.

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