The Starkweather Creek and Olbrich Gardens Watershed Study Area is the largest watershed study area in the City of Madison (Exhibit 1b). The City already has five (5) existing 1D/2D computer models covering the containing the entire study area built in XPSWMM 2020.2 by others. The CONSULTANT will evaluate the models and find the most effective way to develop flood inundation mapping for the entire study area in accordance with the City’s Watershed Study Program. Whether utilizing the existing models or developing a new model or multiple models. It is the City’s desire to develop and maintain 2D flood mapping at grid dimension of approximately 10-15 ft. Documentation of issues known to the City with the existing models and configuration are provided in Exhibit 1c to this RFP. This information may not be comprehensive of all errors or deficiencies in the modeling. Specific tasks for this RFP have been identified below, along with the required deliverables per task. All cost estimates shall refer to the specific task number or sub-task component as outlined in the Cost Proposal document, included with the RFP. Consultants are encouraged to review in detail the preferred scope of work described herein and may propose deviations or alternative approaches that, in their professional judgment, will better achieve the project objectives. Any such deviations or alternatives must be clearly documented and justified within the proposal. The City will review all proposed deviations during the selection process, and, if accepted, they will be incorporated into the final contract scope of services. To address the City’s desire for expedited analysis and project development in the Olbrich Gardens subwatershed, the CONSULTANT shall treat Olbrich Gardens as a priority work package within this contract. All modeling, calibration, analysis, and reporting tasks for Olbrich Gardens shall be completed and delivered to the City prior to commencing equivalent tasks for the remaining sub-watersheds within the Starkweather Creek Study Area. This approach is intended to allow the City to advance project development and potential implementation in Olbrich Gardens ahead of the broader study area. For each task in Phases 1 and 2, the CONSULTANT shall first complete all work for the Olbrich Gardens sub-watershed and submit deliverables and then move on to subsequent tasks for the sub-watershed. All other sub-watersheds in the study area shall progress through the study tasks together. Please note, the Scope of Services outlined below is distinct to the Starkweather Creek and Olbrich Gardens Watershed Study. It is the responsibility of the CONSULTANT to read and understand differences in the Scope of Services from past RFP issuances.
