Balance Hydrologics developed and designed the stormwater management strategy for the large Gale Ranch Project in southern Contra Costa County. Initial work was carried out to identify opportunities and constraints for stormwater infrastructure related to both runoff quantity and quality. Balance engineers assisted in the refinement of designs for specific structural best management practices (BMPs) at the site and directed the hydrologic and hydraulic design of high-flow bypass structures and outlet works for both bioswales and extended detention basins. This work culminated in the production of the project Stormwater Management Plan (SWMP) for permitting purposes and, subsequently the Operations and Maintenance Manuals (OMM) for all of the structural BMPs. In the first five years since construction, Balance Hydrologics assisted Shapell Homes with implementation of monitoring and reporting as guided by the OMM. Once these BMPs were transferred to the City of San Ramon, Balance provided an additional five years of service to complete semi-annual monitoring and reporting under the requirements of the OMMs and guide the City with flexible maintenance strategies for continued stormwater management.