Historie

Historie SONNTAG Baugesellschaft

Bauunternehmen SONNTAG

Our company

History

Development of SONNTAG

1932

Company founded by Kastor Sonntag with the focus on structural engineering.

1959

Josef Sonntag manages the enterprise, increasingly concentrating on underground construction, road construction and civil engineering.

1964

Creation of a branch in Bingen.

1983

Moves into own premises in the Bingen-Kempten industrial estate; the site is approx. 12,000 m².

1986

First construction site using electronically-controlled pipe driving.

1988

Relocation of the main headquarters from Gondershausen to Dörth industrial estate. The site is approx. 21,000 m². The paved areas are used as a building yard, workshop and storage area.

1989

Entry into the RKS Kies- und Splittwerke (gravel and stone works), Eckelsheim.

1990

Environmental protection prize for environmentally-conscious corporate management.

1991

Founding of the SONNTAG Bau GmbH in Hönow, Berlin.

1996

The executive shareholders, Bernd Sonntag (Dipl.-Ing. (graduate engineer), Dipl-Wirtsch.-Ing (graduate business engineer)) and Marion Sonntag (Dipl.-Ing. (graduate engineer)) manage the SONNTAG Group.

2004

SONNTAG takes over the reinforced and precast, prestressed concrete plant in Halsenbach and starts trading under the name of W + S MONNERJAHN GmbH.

2007

World première in Worms! A 464 m long culvert pipeline is driven through under the Rhine using the newly developed Direct Pipe® method for the first time.

2009

SONNTAG invests in a drilling rig of its own, a BG 20 with 70 t operating weight, thereby gaining a foothold in foundation construction.

2011

Acquisition of another drilling rig with 85 t operating weight.
National and international award for the construction of a trenchless air cushion inverted syphon under the river Enz and the river Nagold. The order was placed by 'Stadtentwässerung Pforzheim' (ESP - 'waste water authority').

2014

The new workshop hall at our headquarters in Dörth is completed. The 1,500 m² hall with state-of-the-art warehousing technology will once again optimise maintenance and project preparation for pipe jacking.

2015

The year of the culvert

In 2015, SONNTAG implemented two enormous long-distance pipe-jacking sections under the Rhine in Cologne and Bingen.

2015

The SONNTAG quality and environmental management system was successfully certified by the TÜV in accordance with DIN ISO 9001 and ISO 14001.

2016

Bingen site - offices given a new lease of life

The tired old premises have been gutted, redeveloped and extended. 240 square metres of new office space: more offices with more room, a larger meeting room with state-of-the-art technology, and an additional archive. Even the entrance area has been completely redesigned.

2016

Acquisition of a new RG 16 T ram and extension of our microtunnelling division with the purchase of a new AVND 2000 AB drilling head and a C50 control container.

2017

SONNTAG invests in two new drilling rigs, BG 20 and BG 28, to expand the foundation construction division.

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