Book Review: Moddergeuzen

Front cover Moddergeuzen by C. Baardman (Credit: JN Voorhoeve, Den Haag)

Summer is in full progress. People are already taking holidays. So, it is time for another book recommendation to take with you and pass your leisure time. Another favourite book from my dredging library is ‘Moddergeuzen’, or ‘Mud Beggars’, by C. Baardman1. However, the English translation doesn’t convey the right feeling about it. In Dutch the ‘Geuzen’ were patriotic nobleman, who fought against the Spanish oppression in the 80 year war2. Beggars sounds so derogatory.

In contrast to ‘Mannen van Sliedrecht’, from my previous review3, ‘Moddergeuzen’ is more describing the personal life of the crew on board the dredges, instead of the big historical picture. Baardman is able to bring all the crew members to life. At least to me. Either by reminding me of stories I heard from my family, or even by similar events I experienced personally. Still, there are some main characters. Most notably Leen Hoornaar and his son Jan. There are also other family ties between the crew members, as was and still is often the case on the Dutch dredges. Somehow, all those stories by and discussions with dad at the kitchen table do convey more knowledge insight and experience, than education at school does. (You need school! What your parents can tell you is your bonus to stand out from the crowd.)

That is also one of the topics Baardman addresses in his book. The old trade handed down from father to son, versus the new developments in culture, where education and knowledge gains momentum in the dredging industry. Another topic is the continuous inequality between the crew members on the one hand and the people from the office on the other hand. Regularly, socialistic thoughts are proclaimed by the crew members, but Baardman voices his idea about social improvement through the characters of Leen and Jan Hoornaar. They are the first glimmers of a work council in the industry. Another social phenomenon is the ever present religious group, that tends to be very conservative. Still, Baardman would rather identify himself as a religious writer. However, his concern to get the message across, but be careful not to look over zealous often made his books read like a regional novel4.

Well, regional is hardly applicable. Just as the dredging industry expanded all over the world, the stories in the book take place in all the now familiar dredging markets: China, Germany, Belgium, France, Rumania. Particularly the storyline in Hamburg was very interesting, as this is also the same time and region where my great grandfather has been working for some time (another story for later). The descriptions about how they must have travelled to and from the project where very illustrative.
Also the pranks they pulled on each other, or more precise on the youngest person on board where very familiar. I’ve heard the story of the coxswain being ordered to fry the cucumber, before. I don’t know if pranks are banned today. At least I don’t hear them so much anymore.

Paper model I received after building my first dredge

Times have changed. So, were the changes described at the story time in the book. Shure, there were a lot steam driven bucket ladder dredge in the adventures. And they do bring most of the exciting adventures. However, modern equipment was on the rise. Plain suction dredges and the first hopper dredges also feature in the book. Remember, hopper dredges at that time were still stationary. Free sailing trailing suction hoppers came much later. The dredge on the cover is a nice example of early twentieth century dredge design. As it happens, the National Dredging Museum in Sliedrecht has model, that looks very similar to the one depicted.

Suction hopper dredge ‘Nautilus II’ for Prins Aannemingsmaatschappij build by J&K Smit

References

  1. Moddergeuzen, Amazon
  2. Geuzen, Wikipedia
  3. Book Review: Mannen Van Sliedrecht, Discover Dredging
  4. C. Baardman: De schrijver en zijn werk, Historische Vereniging Hardinxveld-Giessendam

See also

A Visit to the Oresund Link with the CEDA Dredging Management Commission and 23 Years Ago with DOT

The CEDA Dredging Management Commission on site visit at the Oresund Link

This week, there was a meeting of the Dredging Management Commission of the CEDA. In this case, the venue was the offices of Femern A/S in Copenhagen1. The objective of the Dredging Management Commission is to provide expertise and guidelines to successfully manage dredging projects. A first publication was the ‘Checklist for Successful Dredging Management’ introduced at the CEDA Dredging Days last November. Currently I am involved in the Working Group on Innovative Dredging Technology2.
One of the items on the agenda was a visit to the artificial island of Peberholm. This island was reclaimed in 1995 during the Oresund Link Project, a tunnel and bridge connection that links Denmark and Sweden over the Oresund. A massive complex project, involving two countries, multiple contractors and numerous suppliers. Unlike most of the complex international government projects, the Oresund Link was delivered ahead of schedule and within budget3.

View from Peberholm on the Oresund Bridge and Sweden

At the time, I did my graduation thesis project with Skanska, one of the main contractors. There were also two other students working with Skanska. And as there were a lot of other Dutch contractors involved, the student club of Dredging and Offshore Technology organised a study tour to the project and have a first-hand experience with this landmark project. Returning to these sites with the CEDA was interesting to see the final product after it’s been working for several year in use.

Students of Dredging and Offshore Technology on study tour in 1995

On the Swedish side, a bridge was a good solution. On the Danish side, the link would be too close, to Copenhagen International Airport to build a bridge. It would interfere with the flight path of approaching planes. Therefore, a sunken section tunnel was chosen. Peberholm was created with fill material, dredged from this tunnel trench. Digging through hard limestone rock, the cutter suction dredge ‘Castor’4 consumed about 62,000 pick points. In the end, they had to exchange all the teeth every 15 minutes, sometimes too hot to handle.

Cutter head of the CSD ‘Castor’

Each pillar and the two pylons of the bridge have a foundation that reaches to the hard bedrock of the Oresund. For this dredging work, amongst others, the back-hoe dredge ‘Rocky’5 from Skanska was deployed. One of the contractual clauses was that turbidity had to be reduced to an absolute minimum, never seen before in any contract. Although protesting, the contractors complied and did a great job on reducing turbidity. The loose material from the bottom and the rubble from the bedrock created visual plumes anyway and Skanska had to modify their procedures and equipment to reach the stringent standards.

Left, Back hoe dredge ‘Rocky’. Middle, bucket of crushed limestone. Right, Spill plume.

It was fitting, that we visited the location of this impressive project as inspiration to advice how to successfully manage a dredging project. The next step to test the management skills of the Danish people will be the Fehmarn Belt Project6.

Panoramic view from Peberholm. Denmark left, Sweden right and Saltholm in the middle.

References

  1. Femern A/S
  2. CEDA Dredging Management Commission, CEDA
  3. Oresund on time and within budget, Øresundsbron
  4. Castor, Van Oord
  5. Rocky (after modification), Boskalis
  6. Fehmarn Belt Project, Wikipedia

See also

¡VAMOS! mining concept for submerged inland mining on any continent

¡VAMOS! equipment on trial at Lee Moor, Devon, UK

Today, the WEDA Dredging Summit and Expo 2018 starts1. Tomorrow, Olivier Marcus is going to present a paper on the ¡VAMOS! project2, I assisted co-authoring. The message we wanted to convey is the applicability of the ¡VAMOS! system we’ve developed in a European Research and Development consortium3. By now we were well acquainted with the European Situation, but as this was going to be presented in the United States I had to do some research all over, for the American market situation. It turned out that ¡VAMOS! concept could be used their as anywhere else.

Schematic of typical vertical ore body in an opencast or submerged setting (Credit: ¡VAMOS!)

First of all, some explanation what the ¡VAMOS! project is about. We’ve noticed that here in Europe mineral resources are heavily depleted or located at locations that are not accessible due to their economic or environmental value. One solution would be to dig deeper, but in open cast mining, you’ll run into an enormous overburden removal and drainage problems. The other is to tunnel mining, but that is very expensive and dangerous. The ¡VAMOS! concept opens up a new approach: submerged mining.

Diagram of the original ¡VAMOS! concept (Credit:¡VAMOS!)

Instead of pumping the water out, we use it to transport the mineral to the plant. And this is very familiar for us in the dredging industry. So, we’ve found another location where we can discover dredging! Usually dredging involves transporting huge volumes of sediment, but the fraction of the ore, that is really paying for the operation tends to be very small. In mining terms it is the ore grade. Depending on the ore grade, the operation can be economically feasible or not. As this is a very fine line, mining economics have already done a lot of research on this and they call it the ‘Exergy Cost’. In short: an operation for low grade ore may be more expensive when the mineral is expensive. In fact, when one is mining sand, the ore grade is 100% and the price will be low, so the profit has to come from its volume.

Exergy cost (kWh) needed for producing a given mineral from bare rock to market. (Credit: Valero)

This model is basically applicable in both the European and the American market. Although the local business mentality will result in different underlying economic calculations. In Europe we were working with a report on the critical resources that are on the agenda of the European Commission4. It turns out, that now the United States has their own list of critical minerals5, just signed into executive order6. The list differs somewhat, but is certainly recognisable. This is a good indication, that the ¡VAMOS! mining concept can be evaluated equally to the other options for the American market.

Medium-Term (2015–2025) Criticality Matrix (Credit: US DOE)

So, who knows, maybe there is an innovative entrepreneur in Olivier’s audience at the WEDA and the first real production model might be put to work in an American mine. At least, when delivering a product like this, we would not have to worry about the Jones Act.

MV handling on LARV at Lee Moor test site in Devon, UK

References

  1. Dredging Summit and Expo 2018, WEDA
  2. WEDA Dredging Summit & Expo, Damen
  3. ¡VAMOS!
  4. EIP on Raw Materials, European Commission
  5. Interior Seeks Public Comment on Draft List of 35 Minerals Deemed Critical to U.S. National Security and the Economy, US Department of the Interior
  6. A Federal Strategy To Ensure Secure and Reliable Supplies of Critical Minerals, Executive Order 13817 of December 20, 2017

See also