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Dirk Roukema

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Dirk Roukema

Dirk C. Roukema graduated from Delft University of Technology in 1991 as an hydraulic engineer. He worked for HAM as dredging superintendent in various countries, later shifting to the Research Department. At the Joint Venture “Combinatie Ketelmeer” he was employed as production engineer. He now works in the civil engineering department of Ballast Nedam Dredging


Articles by

When is an Escalation Clause Necessary? Dealing with Price Fluctuations in Dredging Contracts

When is an Escalation Clause Necessary? Dealing with Price Fluctuations in Dredging Contracts

Unexpected costs resulting from fluctuations in prices for raw materials,fuel and labour can add extra financial risks for dredging contractors and clients.

PDF document | 3 MB

Adverse Physical Conditions and the Experienced Contractor Test

Adverse Physical Conditions and the Experienced Contractor Test

Standard dredging contracts do not necessarily take into account “unforeseeable” soil conditions which can cause serious financial uncertainties. The time to consider these issues is before work commences.

PDF document | 1 MB

Realisation of the Ketelmeer Storage Depot

Realisation of the Ketelmeer Storage Depot

A well-planned storage depot will change the entire scenery of the highly polluted Lake Ketelmeer, simultaneously cleaning up contamination and creating recreational islands and non-cultivated nature reserves.

PDF document | 407 KB