Brown’s Beck Brook (also known as Donard stream) is a second order tributary of the Carrigower River, Co. Wicklow (Fig. 1), which in turn joins the River Slaney, one of the main river systems in south-east Ireland. According to the most recent Environment Protection Agency (EPA) WFD report (2013-2018), the status of the impacted reach near the village of Donard is ‘good’, but the status drops to ‘poor’ immediately upstream. In addition, this reach has undergone localised channelization involving major realignment and re-sectioning of the channel, and subsequent construction of a concrete ford crossing in the 1960s (Lat. 53° 0′ 58.4, Long. -6° 37′ 23.2) (see Fig. 2). The ford, while being degraded and leaky was c. 1.5 m high and continued to represent a barrier for fish, including Atlantic salmon (Salmo salar). The structure was therefore designated for modification/removal by the Inland Fisheries Ireland (IFI), in consultation with the landowner, and was included as a case-study under the UCD Reconnect project (www.ucd.ie/reconnect/). Baseline characterisation and ongoing hydromorphological, habitat and ecological monitoring have been carried out at the site since spring 2017. The results from this impact study will be updated here once the Reconnect project has been completed.