The City of West Des Moines (City) is requesting qualifications from professional engineering firms to design a project seeking funding under the Community Development Block Grant (CDBG) program through the Iowa Economic Development Authority (IEDA). The selected firm will work with a project team comprised of City staff and project stakeholders to provide conceptual, preliminary, and final design, construction documents, and resident construction services for an approximately 10 ac-ft detention facility in an existing residential neighborhood. Once a firm has been selected based upon the criteria described in this Request for Qualifications, City staff will negotiate a fee with the Consultant for performing the desired scope of services. 1. Project Overview 1.1. Project Background The subject site was first identified as a possible regional stormwater management facility in the SE Basin Stormwater Study completed by LT Leon Associates, Inc. in 2013. The study analyzed the existing stormwater system to identify deficiencies and propose improvements to reduce risk of flooding. In 2020 the City acquired the property, and the existing site was cleared in 2021. An updated analysis was completed by WHKS & Co. in 2022 to model recent storm sewer modifications and update survey information. Two stormwater detention ponds were recommended for the site, totaling approximately 10 ac-ft of storage, to mitigate the increase in peak flow rate due to capacity improvements needed in the upstream storm sewer system. The total project budget is $2,000,000 with funding for design in 2025 and possible construction in 2026. Portions of the project may be funded through the CDBG program. The budget is inclusive of all phases of the project including design, environmental, geotechnical, public involvement, grant investigation and application, construction, observation, and landscaping. 1.2. Project Goals Design of the 12th Street & Vine Street Regional Stormwater Management Facility will achieve the following goals: • Attenuate anticipated peak flows to limit risk of downstream flooding. • Accommodate efficient long-term operation and maintenance. • Engage stakeholders and consider public input. • Incorporate aesthetic features to improve visual appeal and blend in with the residential character of the surrounding neighborhood including potential park elements. • Evaluate and implement best management practices to improve water quality. • Identify and obtain potential funding sources for water quality improvements.
