Old millstream to be renewed

There could be new life for a disused mill stream in Dorchester, with the help of conservation and community groups.  Dorset Wildlife Trust’s Dorchester Mill Stream Enhancement Scheme plans to breathe new life into this man-made tributary of the River Frome, which has the potential to be a good chalk stream site for wildlife.

A recent investigation by the Environment Agency for the River Basin Management Plan showed that, although the stream has good chemical water quality, it is poor for wildlife and physical characteristics, as a result of its former use to provide water for milling. 

Sarah Williams, Conservation Officer at Dorset Wildlife Trust, said: “The hydromorphological quality, or physical functioning of the stream, is stopping it from being a wonderful stretch of chalk river, an important and rare habitat.  The over-wide channel and straight, hard sides do not provide the habitat needed by fish and invertebrates or sufficient vegetation for water voles and birds.  Our plans will soften the shape of the stream and provide bankside vegetation to allow the excellent chemical water quality to fulfil its potential as a haven for river wildlife.”

The proposed work will include low level shelves (or berms) to narrow wide sections and provide habitat for fish, birds, water voles and invertebrates.  The berms will be made on site using local brashwood faggots and planted with native species.

Sarah added: “The planting will improve the banks for nesting birds and mammals, including water voles which are known to be nearby but absent from this stream.  Assessments have shown there will be no increase in flood risk and there will actually be a reduction in the risk to residents of Swanbridge Park.  We hope to start work next summer, and would love to hear from volunteers who can join us to help plant up the river bank.”

Planning permission has been applied for, with a decision expected in late September.