Specifications include, but are not limited to: The consultant shall provide detail on their approach, deliverables, schedule, and cost for each of the following tasks:•Visit the dam site to collect all data necessary to inform modeling and inspection efforts. Identify areas for construction access, laydown, stockpile, etc., and collect any topographic data needed to assess the structures implicated in this study. •Basic hydrologic and hydraulic data collection needed to assess how the changes in channel flows, velocities, and flood inundation levels will affect the surrounding lands and buildings in pre/post dam removal scenarios. Assessment limits should extend to the upstream extent of the impoundment and downstream to assess any alteration to water surface profiles that may occur post removal, including downstream culverts on the access and Reservoir Road. •Quantification of the total impounded volume of sediment and water behind the dam. •Assessment of potential impacts of dam removal on well water levels, pipelines, pumphouses, access roadways, and any other infrastructure that may be affected. Please include mitigation actions to address any significant impacts to critical infrastructure. •A structural inspection of the dam and an estimate of the repair and maintenance costs required to ensure structural integrity and public safety at the site, should the dam remain in place. •Draft 30% conceptual design, cost opinions, and possible timeline for dam removal and river restoration at the site, including options for associated culvert upgrades and riparian restoration needed to maintain lateral and longitudinal connectivity through this reach. •Preparation of a preliminary report for review by FCNRCD, TNC, VNRC, and the Village of Enosburg Falls. 30% conceptual designs should be accompanied by reports describing the basis for design, including structural integrity of the dam, channel design, hydrologic and hydraulic calculations, an assessment of safety concerns, and impacts on aquatic biota. •After review and incorporation of comments from the preliminary report, a final report will be generated. The final report will need to provide all the relevant data and documentation needed to help partners reach consensus around the best path forward. The report shouldinclude:1.Summary of recommendations and results of the structural inspections and hydrologic & hydraulic analyses, including the dam site, and any public or private infrastructure effected by the removal of the dam, including downstream culverts, water district infrastructure, and roadways.2.An assessment of potential impacts of dam removal, considering aquatic and terrestrial wildlife, water quality changes, cultural significance of the dam/mill buildings, and the economic effects on the town.3.30% conceptual design detailing potential locations for construction access, laydown and stockpiling, coffer damming/water diversion, traffic control, site restoration and any mitigation actions for existing infrastructure.4.An itemized preliminary cost opinion and project timeline for the major components of the proposed removal scenario, including specifications of unique materials, methods or equipment, traffic control, water control, etc., required to accomplish the project.5.A comprehensive list of federal and state permits and the relevant regulatory agency consultations needed in order to commence the project, including any post project monitoring efforts, title/easement/zoning considerations, mitigation requirements, historic preservation issues, public comment requirements, right of way and abutter concerns, and any other documentation that may be required in order to complete construction of this project.6.Appendices containing the supporting documentation, technical details, and modeling results.
