PENSTOCK IN LOWER HALLEBY STREAM, SOUTHWEST OF LAKE TISSØ
The water levels of Lake Tissø – and other surface water – are regulated here and forwarded to the industries of Kalundborg city as som process- and cooling water, via Kalundborg Water Utilities.
1883 the outlet from Lake Tissø to Lower Halleby Stream was deepened to create better grazing for cattle dig peat in Greater Åmose Moors. The consequence was the deepened stream lowered the water lavels of Lake Tissø so much, that parts of the lake dried out. Subsequently the first penstock was built in 1889.
Regulation of water levels in Tissø was changed when Kalundborg Water Utility was granted permission to increase abstraction of water from the lake in 2001.
OMBYGNING OG RENOVERING
WINTEC was responsible for rebuilding the existing penstock i 2002 to maintain optimal water levels i Tissø, where a fishway also was established.
The penstock is connected to two water level meters in Tissø. The gate is regulated up and down according to actual water level, 6 cm at a time.
Climate changes have forced Kalundborg municipality to decide for an improved penstock latest 2020, enabling them to better regulate the increasing water levels of Lake Tissø.