Restoration works carried out on the River Gade in the northern half of Gadebridge Park, Hemel Hempstead, comprised tree thinning, the re-meandering of the river course, removal of weirs and creation of a wetland and footpath. As the works had the potential to impact on archaeological remains, Hertfordshire County Council's Historic Environment Advisor recommended that the works should be subject of archaeological monitoring. The archaeological monitoring was undertaken on the 26th and 27th March 2018 The investigations revealed that the river channel has been narrowed most likely during its transition from agricultural land to park land in the 19th century and a terrace was formed along its western edge. Where undisturbed natural geology survived, there was no evidence of archaeological features or deposits that were earlier than the 19th-century in origin. Modern finds not retained