Bath & North East Somerset Council is seeking to appoint a suitably experienced contractor led team to test, investigate, appraise and develop a range of deliverable options for the replacement of the Pulteney Radial Gate on the river Avon in the centre of Bath. A range of options are being considered, including 1) a Hydro-Station 2a) Extend the existing Horseshoe Weir 2b) Create a Stepped Weir within the existing channel 3) Infill the existing channel to create new public realm 4a) Own & Operate the Gate, 4b) Do Minimum to the Asset. Each option will need to be assessed against relevant access, logistics and construction constraints. The appointment will include the review and validation of existing project information; coordination and execution of intrusive and investigative survey workstreams; assessment of site access, interfaces, constraints and stakeholder considerations; and comparative appraisal of the options and associated logistics scenarios. The appointed contractor will be expected to provide advice on buildability, temporary works, programme, cost, risk, Principal Designer/CDM matters and whole-life implications. The commission is intended to establish a well evidenced technical, commercial and construction basis for the project, in order to support the Outline Business Case at P3M Stage 2. This commission is separate to any future decision to progress to detailed design, statutory approvals or main works procurement. The output will be a series of in-depth evidenced based appraisal reports with a final composite report and recommendation to support Outline Business Case decision-making and any future route-to-market strategy for the Main Works.