Highway 99 Water Main Crossings Improvements (I Street, G Street, and Sierra Drive)

The City of Modesto is initiating the Highway 99 Water Main Crossings Improvements project to strengthen and replace approximately 1,220 linear feet of water mains across three bridge overcrossings at I Street, G Street, and Sierra Drive in Central Modesto. The project aims to replace aging, undersized cast iron steel mains, which are prone to leaks and low pressure, with City Standard water mains to improve system reliability, flows, and pressures. These crossings serve as critical distribution points between the northeast and southwest sides of Highway 99. Classified under NAICS code 237110, the project is identified by E.A./UTL No: 202506 and was posted as a forecast on September 10, 2025. The City of Modesto has filed a Notice of Exemption with the Stanislaus County Clerk, certifying that the work is exempt from environmental review under CEQA categorical exemptions Sections 15301 and 15303, as it consists of the repair and replacement of existing infrastructure without significant expansion of use or capacity. David A. Felix, Associate Engineer, serves as the primary point of contact for this effort.