DOP Submersible dredge pumps

DOP on wire crane mines sand at sea to replenish Tuscan beach

PROJECT SUMMARY

Location: Gulf of Follonica, Tuscany, Italy
Period: Q2 and Q4/2019
Product type: DOP250 with sand mining head
Contractor: Sales Construzione s.p.a.

DOP on wire crane mines sand at sea to replenish Tuscan beach

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The Gulf of Follonica is situated on the Mediterranean coast. As the autumn and winter storms have resulted in heavy coastal erosion over the past few years, the narrowed beach badly needed replenishment. For this, the DOP dredge pump has been used.

Beach replenishment by using a DOP mining local sand which is pumped to the beach

The DOP250, which pumps some 1.250 m3/h, was suspended on a wire crane. This crane is located on the barge Massimo. The unit was located some 400 meters off shore; the dredge pump delivered the mined sand ashore using flexible floating hoses.

The DOP250 is fitted out with a sand mining head using pressurised jet water for loosing compacted soil and boosting mixture concentration

The eroded beach has a total length of 7 km. The total volume of sand to be mined is approx. 66.000 m3.
The DOP dredge pump mines the sand at an average dredging depth of 3-4m.

The DOP250 in action, mining sand from the sea bed

On the beach the sand was dispersed using bulldozers. Due to the tourist season, the job was not done in one go. It was started in spring, suspended in summer and finished in the autumn – ready for the next tourist season to start.

The DOP is mounted on a wire crane which is located on a barge offshore