Etang De Hirbach

France Lake 0 - Not classified

Hirbach Pond is an artificial reservoir located on the territories of Holving and Hilsprich communes in Moselle, France, created in the early 1930s as a military water reserve. The pond has a complex, branched shape covering 45 hectares with a maximum length of 1400 metres and maximum depth of 6.5 metres at the dam. It serves dual purposes as a tourist attraction with camping and bathing facilities, and as a protected ecological area. The water level is regulated at approximately 221 metres above sea level by an overflow mechanism on the eastern dam.

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Water

Artificial pond (étang-réservoir). Surface area: 45 hectares. Maximum length: 1400 metres. Width of appendices: 120 to 150 metres (250 metres for the southern section). Maximum depth: 6.5 metres at the dam. Water volume: 1.22 million cubic metres. Water level regulated at 221 metres above sea level. Estimated water renewal time: approximately 20 months. Fed by multiple streams draining forest and agricultural lands, with overflow directed towards Mutterbach to the east. Low flow rates relative to pond volume result in minimal apparent circulation beyond inlet and outlet points.

Location

Located in the communes of Holving and Hilsprich, Moselle department, France. The bathing area is integrated within a camping facility situated north of the dam. The pond is at an altitude of approximately 221 metres.

Water Quality

Water quality classification and monitoring results data are referenced in the document structure but specific classification and recent results are not provided in the extracted text. The profile identifies multiple pollution sources requiring management.

Risks

Cyanobacteria proliferation identified as a priority risk. Other identified risks include bird presence contamination, contamination from Magers Weiher stream, wastewater discharge into the pond, fishing-related risks, runoff water from surrounding areas, and risks related to meteorological conditions. Overflow from four wastewater network pumping stations discharge into the pond.