In Harris County, Texas, the third-most-populous county in the nation, the Upper Langham Creek watershed is one of the few areas that is still largely undeveloped. Freese and Nichols is serving as program manager for the $80 million Upper Langham Creek Frontier Program, helping the Harris County Flood Control District plan for drainage infrastructure, stormwater quality treatment and multi-use space ahead of future development. This is a departure from typical stormwater planning, which tends to focus on individual mitigation projects and considers regional solutions only in reaction to floods. Our team performed hydrologic and hydraulic analyses in conjunction with natural channel and water quality feature design work, resulting in a comprehensive design to address the needs of the 16-square-mile watershed. This regional approach will provide cost savings that benefit public and private entities alike. Pictured is a conceptual rendering of a regional detention basin, which will provide both detention mitigation for new development and multi-use opportunities for the local community.