Australian Dredging and General Works was established in 1950 through the cooperation of two longstanding Dutch civil-engineering companies: Adriaan Volker’s Maatschappij tot het Uitvoeren van Openbare Werken and Van Hattum & Blankevoort.
Both businesses had grown from nineteenth-century contracting enterprises into internationally active engineering organisations. Their Australian joint venture combined Volker’s strong association with Sliedrecht and the dredging industry with Van Hattum & Blankevoort’s experience in hydraulic engineering and major civil works.
During the decades that followed, mergers transformed these separate family businesses into increasingly large corporate groups. Australian Dredging and General Works consequently passed through a succession of Dutch ownership structures involving Stevin Groep, Koninklijke Volker Stevin and, ultimately, VolkerWessels.
This corporate history helps explain why an Australian company founded for a single Melbourne dredging project survived for approximately six decades.
Adriaan Volker and the Sliedrecht dredging tradition
The history of Adriaan Volker’s business began in Sliedrecht in 1854, when Adriaan Volker established himself as an independent contractor.
Sliedrecht’s location beside the Merwede and the wider Rhine–Meuse delta had made it an important centre for river works, dredging and hydraulic construction. Local contractors developed practical knowledge of working with shifting waterways, silt, riverbanks and unstable ground.
As Dutch dredging technology became more sophisticated, Sliedrecht firms began undertaking increasingly large projects outside their immediate region and eventually outside the Netherlands.
Adriaan Volker’s enterprise expanded from a local contracting business into an international organisation involved in dredging, land reclamation, harbour construction and other public works. The company became closely associated with the vessels, machinery and specialist personnel required to operate in distant locations.
The international orientation of the business was essential to its participation in Australia. The Williamstown project required the company to send not only employees but an operational dredging fleet some 11,000 miles from the Netherlands.
In 1972, the company adopted the name Koninklijke Adriaan Volker Groep—the Royal Adriaan Volker Group—recognising its growth and standing within Dutch civil engineering.
Van Hattum & Blankevoort
Van Hattum & Blankevoort traced its history through two nineteenth-century contracting businesses.
In 1831, Arie van Hattum began maintaining river groynes in the Merwede and Lek. Ten years later, Cornelis Blankevoort established himself as a contractor in Monnickendam.
The two enterprises first cooperated in 1900. Their activities included river engineering, foundations, bridges, locks, pumping stations, quays, tunnels and other hydraulic and civil-engineering works.
Their collaboration eventually developed into a unified business. Van Hattum en Blankevoort N.V. was formally established in 1950—the same year in which Australian Dredging and General Works began operating.
By then, Van Hattum & Blankevoort had become an experienced international contractor. Its head office was in Beverwijk, where the business became an important local employer.
The company expanded rapidly during the post-war reconstruction period. It participated in major Dutch water-management and infrastructure projects, including parts of the Delta Works constructed following the catastrophic North Sea flood of 1953.
By 1970, Van Hattum & Blankevoort reportedly employed approximately 5,000 people, including about 2,000 working outside the Netherlands.
This combination of domestic engineering strength and international experience made it a logical partner for Adriaan Volker in Australia.
The Australian joint venture
Australian Dredging and General Works was established as a relatively small Australian joint-venture subsidiary associated with the two Dutch companies.
Adriaan Volker supplied its dredging experience, vessels and connections with the skilled maritime workforce of Sliedrecht. Van Hattum & Blankevoort contributed its civil-engineering capacity, international organisation and technical expertise.
The Australian company’s initial approved capital was reportedly £10,000 Australian, while contemporary newspaper reports valued the first contract at approximately 11 million guilders.
This difference reflects the company’s function. Australian Dredging and General Works was the locally incorporated operating vehicle, while much of the equipment, technical expertise and financial capacity came from its Dutch parent companies.
The joint venture allowed the Dutch firms to:
- enter into Australian contracts;
- employ Dutch and Australian workers;
- import and operate dredging equipment;
- acquire property and provide accommodation;
- establish relationships with Australian port and government authorities; and
- pursue further work after the initial Melbourne contract.
The company established its first Australian base at Williamstown.
Its formation and subsequent Australian activities are described in the separate DACC article Australian Dredging and General Works (1950–2011): Dutch engineering in post-war Australia.
Why the companies expanded internationally
The establishment of the Australian subsidiary formed part of a wider international expansion by Dutch construction and dredging companies after the Second World War.
The Netherlands possessed highly developed expertise in hydraulic engineering, but its domestic market was limited. Dutch firms consequently sought work in Europe, Asia, Africa, the Middle East, the Americas and Australasia.
Australia offered substantial opportunities. Its ports required expansion and continuing maintenance, while post-war industrial development created demand for docks, shipping channels, pipelines, reclamation and coastal infrastructure.
The Dutch companies could provide complete operational packages consisting of:
- engineering and project management;
- specialised vessels and equipment;
- experienced crews;
- maintenance and technical support; and
- skilled workers willing to relocate internationally.
Australian Dredging and General Works was therefore not simply an isolated overseas subsidiary. It represented the international business model developed by Dutch hydraulic-engineering contractors.
Van Hattum & Blankevoort becomes part of Stevin Groep
By the late 1960s, increasing project scale, capital requirements and international competition encouraged consolidation within the Dutch construction industry.
In 1970, Van Hattum & Blankevoort joined with Boele & Van Eesteren and Van Splunder to form Stevin Groep. Contemporary reports indicate that Van Hattum & Blankevoort Beheer initially served as the holding structure before the new organisation adopted the Stevin name.
The name referred to Simon Stevin, the Flemish-born mathematician and engineer whose work had become associated with Dutch scientific and technical achievement.
Van Hattum & Blankevoort continued to exist as an operating company within the larger group. Its identity and specialist civil-engineering capabilities were therefore retained even as ownership and strategic control shifted to the Stevin organisation.
For Australian Dredging and General Works, this meant that one of its original Dutch parent companies had become part of a much larger and more diversified construction group.
The creation of Koninklijke Volker Stevin
In 1978, Koninklijke Adriaan Volker Groep merged with Stevin Groep.
The combination brought the two original Dutch participants in Australian Dredging and General Works into the same corporate organisation. What had begun in Australia as a joint venture between two separate companies became part of one consolidated group.
The merger created Koninklijke Volker Stevin, which was listed on the Dutch stock exchange.
The enlarged organisation combined:
- dredging and maritime construction;
- civil engineering;
- road building;
- foundations;
- pipelines and technical infrastructure;
- building construction; and
- international contracting operations.
Australian Dredging and General Works became part of this wider international structure.
The merger also helps explain why later records sometimes describe the Australian business simply as a Volker Stevin subsidiary, rather than continuing to identify its two original shareholders.
Australian and New Zealand operations
Within Volker Stevin, Australian Dredging and General Works developed close links with New Zealand Dredging and General Works.
Heini Evers, who worked for Volker Stevin for more than 30 years, served as managing director of both companies from 1982 until 1992.
This arrangement allowed the group to coordinate expertise, vessels and contracting activities across Australia and New Zealand. Dredging equipment represented a substantial capital investment and could be mobilised between projects when economically practical.
The Australasian businesses also participated in changing relationships between public port authorities and private contractors. In New Zealand, several ports moved away from owning and operating their own ageing dredgers and instead adopted cooperative contract-dredging arrangements.
Australian Dredging and General Works was therefore part of an international network rather than an entirely self-contained Australian business.
The divestment of dredging activities in 1991
VolkerWessels’ official corporate history records that the group divested its dredging activities in 1991.
Other historical accounts indicate that the dredging division of Volker Stevin became associated with Hollandsche Aanneming Maatschappij, generally known as HAM. This contributed to a further consolidation of the Dutch dredging industry.
HAM later combined with the dredging operations of Ballast Nedam to create Ballast HAM Dredging. In 2003, Ballast HAM Dredging and Van Oord ACZ agreed to merge, creating the basis of the modern Van Oord group.
This succession means that part of the technical and corporate heritage of Adriaan Volker’s dredging activities eventually passed into Van Oord rather than remaining with VolkerWessels.
However, the precise effect of the 1991 divestment on Australian Dredging and General Works requires further investigation.
Economic historian Associate Professor Pierre van der Eng’s research database records the Australian legal entity as remaining successively associated with:
- Volker Stevin following the 1978 merger;
- Volker Wessels Stevin after 1997; and
- VolkerWessels from 2002 until 2011.
There are several possible explanations. The Australian company may have retained non-dredging civil-engineering activities, continued as an inactive or holding company, or remained within the group under arrangements not explained in the available public histories.
Australian company-registration files should establish what occurred. Until those records have been examined, the distinction should be maintained between the divestment of the international dredging operations in 1991 and the apparent continuation of the Australian corporate entity until 2011.
Kondor Wessels and the formation of VolkerWessels
A second corporate lineage entered the story through the Wessels family.
The Wessels construction business traced its origins to 1933, when carpenter Arend Wessels of Rijssen became an independent building contractor.
The company grew under the leadership of the Wessels family. In 1990, it combined with IBB Kondor through a reverse takeover to create the publicly listed Kondor Wessels Group.
Kondor Wessels specialised particularly in building construction and property development, while Koninklijke Volker Stevin was especially strong in infrastructure and civil engineering.
In 1997, the two listed companies merged to form Koninklijke Volker Wessels Stevin N.V.
The merger created a diversified construction group with activities in:
- building and property development;
- roads and railways;
- civil infrastructure;
- energy and telecommunications;
- specialist engineering; and
- selected international markets.
The shorter VolkerWessels trade name was introduced in 2002.
The group was taken off the stock exchange following a Wessels family offer in 2003, partially opened to external investment in 2007 and listed again in 2017. A successful offer by the Wessels family investment company Reggeborgh ended the listing once more in 2020.
What remained of the original companies
Although mergers created new holding companies, several historic business names survived as operating enterprises.
Van Hattum & Blankevoort continues within VolkerWessels as a specialist Dutch civil-engineering company. Its work includes bridges, tunnels, locks, pumping stations, quays, foundations and water-management infrastructure.
The Volker name also survives across several VolkerWessels businesses in the Netherlands, the United Kingdom and North America.
The original corporate identity of Adriaan Volker’s dredging business followed a different path after the 1991 divestment. Through subsequent combinations involving HAM and other Dutch dredging companies, elements of that heritage became connected with Van Oord.
Consequently, the corporate descendants of the two companies that established Australian Dredging and General Works no longer sit entirely within one organisation:
- Van Hattum & Blankevoort remains part of VolkerWessels;
- the wider Volker construction heritage also remains central to VolkerWessels; while
- part of the former Volker dredging heritage passed through HAM and eventually into Van Oord.
This is characteristic of the Dutch dredging industry, where mergers, shared subsidiaries, vessel transfers and joint ventures created complex lines of succession.
The Australian significance of the mergers
The corporate changes in the Netherlands were not merely administrative matters. They affected the ownership, resources and international relationships of the Australian business.
Through these mergers, Australian Dredging and General Works gained access at different times to:
- a larger international fleet;
- expanded engineering and construction expertise;
- stronger financial resources;
- Australian and New Zealand project networks;
- specialist staff from across the group; and
- the ability to participate in projects outside conventional dredging.
They also make the company’s history more difficult to trace. Records may be filed under Australian Dredging and General Works, Adriaan Volker, Van Hattum & Blankevoort, Stevin Groep, Volker Stevin, HAM or VolkerWessels.
Researchers must therefore look beyond the name appearing on the original 1950 contract.
A corporate lineage spanning more than a century
The history behind Australian Dredging and General Works extended much further back than the company’s formation in 1950.
Its principal corporate milestones were:
- 1831: Arie van Hattum began undertaking river works.
- 1841: Cornelis Blankevoort established himself as a contractor.
- 1854: Adriaan Volker became an independent contractor in Sliedrecht.
- 1900: the Van Hattum and Blankevoort businesses began cooperating.
- 1950: Van Hattum en Blankevoort N.V. and Australian Dredging and General Works were formally established.
- 1970: Van Hattum & Blankevoort joined Boele & Van Eesteren and Van Splunder in Stevin Groep.
- 1972: the Volker business became Koninklijke Adriaan Volker Groep.
- 1978: Koninklijke Adriaan Volker Groep and Stevin Groep merged as Koninklijke Volker Stevin.
- 1991: Volker Stevin divested its dredging activities.
- 1997: Koninklijke Volker Stevin merged with Kondor Wessels.
- 2002: the VolkerWessels trade name was introduced.
- 2011: Australian Dredging and General Works ceased to be recorded as an operating Australian corporate entity.
This chronology demonstrates how a joint venture created by two Dutch contractors became connected with one of the Netherlands’ largest construction groups.
Related DACC articles
- Australian Dredging and General Works (1950–2011): Dutch engineering in post-war Australia
- From Sliedrecht to Williamstown: Dutch dredging workers and their families in post-war Australia
- Van Oord’s Dutch engineering legacy in Australia
- A.F. Smulders: Dutch industrial innovation and its legacy in Australia
- Contemporary newspaper reports on the Sliedrecht–Williamstown dredging migration, 1950–1954
Sources and further reading
- VolkerWessels – corporate history.
- Van Hattum & Blankevoort – company history.
- VolkerWessels, 2017 company prospectus, particularly the corporate history on page 89.
- Historisch Genootschap Midden-Kennemerland, “Een eeuw Van Hattum en Beverwijk”.
- Heini Evers and Roy Weaver, “Privatisation of Ports in New Zealand”, Terra et Aqua, No. 60, September 1995.
- BAM, “Ballast HAM Dredging and Van Oord ACZ to merge”, 3 October 2003.
- Research database compiled by Associate Professor Pierre van der Eng concerning foreign companies operating in Australia.
- Contemporary Australian and Dutch newspaper reports preserved by the DACC.
Further research in Dutch and Australian company archives may clarify the ownership and activities of Australian Dredging and General Works between the divestment of Volker Stevin’s dredging operations in 1991 and the Australian company’s closure in 2011.
