One Lake

Fairfield, CA

PACE designed a 10-acre manmade lake to serve as the heart of the One Lake residential Community in Fairfield, California. The design includes both aesthetic and functional features to manage stormwater and water quality. The lake incorporates a variety of shoreline types such as rock, boardwalk, boulder pocket, and retaining wall, contributing to a natural appearance and minimizing erosion. Additionally, the lake serves as the primary stormwater management system for the residential community. Dry-weather and wet-weather flows throughout the residential development are diverted into the lake for retention, treatment, and landscape irrigation. The lake is designed to attenuate flows to limit the downstream flowrate to predevelopment conditions during the 100-year rainfall event. Water quality treatment consists of aeration, circulation, alum treatment, chlorine treatment, and a sediment basin. The recirculation system consists of underground piping that takes water from the north side of the lake into the pump station, where it is pumped to the sediment basin located underground south of the lake before being discharged back into the lake. The sediment basin includes an access hatch to facilitate maintenance activities when required. The lake also serves as a community amenity and recreational feature for the development. It is surrounded by a collection of parks, playgrounds, gardens, trails, and event lawns, which provide a scenic and social setting for the residents to enjoy together.

Key Features:

• 10-acre integrated stormwater manmade lake system
• Lake area fine grading
• Water quality management system including aeration, recirculation, alum, chlorine, and a sediment basin
• Irrigation storage for the development’s landscaping needs
• Variety of shoreline types
• Storm drain discharge pipes with hydrodynamic separators