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Liepajas groyne
Liepāja, Latvija
Commissioned by
Liepaja municipality
Project type
Designed by
SIA HT-konsaltings

A high priority for the city of Liepaja is to protect strategically important locations from the sea. At the location of the groyne, the width of the shore has already increased by at least 10 meters as a result of the 225-meter-long structure. As the western coast of Kurzeme is characterized by particularly fine sand, the seafront here is particularly vulnerable to erosion – without strengthening, both the wastewater treatment plant, the memorial, and the graveyard would be washed into the sea. The groyne is one of the most effective methods for strengthening and protecting the shoreline against erosion. If properly maintained, the groyne in Liepaja should last a minimum of 60 years. As a structure, it consists of geotextile tubes filled with sand, stones,and concrete cubes; the head of the groyne is further strengthened with grooved walls to protect it from waves.

Liepāja groyne was a challenging construction project. The strong winds and waves in Liepaja demanded unique planning skills when reacting quickly to changing conditions. During the construction work, 6,481 cubic meters of sand, 16,936 cubic meters of Swedish granite, 1,919 concrete cubes, and 207 tons of grooved walls were used. The Liepaja City Council expert commission determined that the groyne was the most feasible option for strengthening the shoreline among several possible options. In the Baltics, this is the only new construction of this type.

Geotextile tubes filled with natural sea sand were used as the base of the groyne to minimizethe environmental impact of the construction work. LNK Industries plans to use the experience gained in other hydrotechnical and bridge construction projects in the future. This includes employing geotextile tubes to collect sludge or build protective structures to secure construction works.

Project news

Liepāja City Building Board commissioned a groyne, which was built to protect the wastewater treatment…