Item 12 - 10th Street and Flower Street Improvements

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2.2.2 Demolition of Two Single -Family Residences Two existing single-family residences are present on the Project Site; these buildings would be demolished as part of the Project. 2.2.3 Zone Change The Project would require a zone change from Professional (P) to Open Space (0). 2.2.4 Parking and Access This park would be a walk-up, pedestrian parkwithout a vehicle parking lot that would primarily serve the local neighborhood. Pedestrian access would be provided from existing and proposed sidewalks along 101h Street and Flower Street. No restrooms would be available. The Project includes closure of 10th Street at the Project boundarywest to Flower Street and construction of a cul-de-sac.The cul-de-sac would include a 35-foot turn radius. The Project also includes demolition of Garnsey Street; this area would be included in the park design. 2.2.5 Site Drainage The Project includes approximately 20,500 square -feet (SF) of irrigated landscape and approximately 30,700 SF of non -irrigated surfaces like concrete sidewalks and rubber surfacing. For drainage facilities, a storm drain system connected to catch basins would collect all water from the Project Site and direct it to natural bioswales located along the western and southern Project boundaries for infiltration into the ground. Additional storm quality controls include capturing water from Flower Street and treating the 851h percentile storm event. To address the existing flooding along Flower Street, an underground bio- retention storage facility would be installed underneath the proposed basketball court to store approximately 54,800 cubic feet of water for infiltration. This approach is designed to alleviate some of the flood concerns along Flower Street. 2.2.6 Excavation and Grading The maximum depth of disturbance would be approximately 13 feet. Site grading would mainly be balanced, however there would be an export for the excavation of the water treatment facilities. The approximate export would be 5,500 cubic yards. This soil would be disposed of at nearby landfills including the Frank R. Bowerman Landfill in Irvine, Olinda Alpha Landfill in Brea, and Prima Deshecha Landfill in San Juan Capistrano. 2.2.7 Security Features and Lighting Hours of operation for the 101h and Flower Street Park would be 6:00 a.m. to 10:00 p.m. daily. A security guard would be posted on rotation and available on -call. The park boundary would include fencing along Flower Street. The skate park would be gated and enclosed with fencing on all sides. The park would provide security lighting located along walkways and Project Overview 2-2 October 2024 10th and Flower Street Park Project 2020-089