The city of alameda green stormwater bioretention areas project will add nature-based bioretention areas at three intersections with roundabouts as part of the central avenue safety improvement

The intersections to receive bioretention areas are adjacent to the SAN francisco BAY and are on the SAN francisco BAY trail and on AC transit bus routes. The bioretention areas will be in the red curb zones of intersections and in the center circles of the three roundabouts. The purpose of this project is to construct sustainable systems that slow stormwater runoff by dispersing IT to vegetated areas, promote infiltration and evapotranspiration, and clean stormwater runoff into the SAN francisco BAY in that discharge of pollutants to the storm drain system is the leading source of water pollution to these water bodies. Bioretention areas have other CO-benefits including flood reduction, multimodal transportation safety improvements and enhanced streetscapes promoting BAY friendly landscaping with california native, drought tolerant species. The project design is expected to be complete in summer 2023 and construction is expected to begin in fall 2023. This agreement provides federal funding in the amount of $1,472,500. Activities:to implement the SAN francisco estuary partnership's comprehensive conservation and management plan, the city of alameda will accomplish the following activities: solicit bids to build the project per EPA grant requirements, award a contract to build the BIO retention areas, and oversee construction of over 6000 FT.SUP2; of BIO retention area.subrecipient:no subawards are included in this assistance agreement.outcomes:anticipated deliverables include project design documents, project bid documents, and construction of over 6000 FT.SUP2; of BIO retention area. Anticipated outcomes include improving the water quality of runoff draining to SAN francisco BAY. Specifically, pollutant removals attributed to bioretention areas range from 70 to 95 percent for sediments, metals, and oils. The intended beneficiaries of this project are communities living on alameda island and the living resources of the SAN francisco BAY and its watersheds.