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03/27/2007 increase the volumes on these segments by more than one percent of its capacity. In the PM peak hour, US 101 southbound segments from Whipple Avenue to Marsh Road would experience V/C ratios greater than 1.0, and project traffic would increase the volume on these segments by more than one percent of their capacity. These effects would represent a significant impact. Mitigation 9-22. Mitigation of this impact to aless-than-significant level would require construction of an additional mixed flow lane. This widening is not deemed feasible due to right-of-way constraints and cost. This impact is therefore considered to be significant and unavoidable. Findings: The changes or alterations proposed by mitigation measure 9-22 are within the responsibility and jurisdiction of Caltrans and not the City of Redwood City. Caltrans can and should adopt proposed mitigation measure 9- 22. IV. PUBLIC SERVICES, UTILITIES, AND INFRASTRUCTURE A. Wastewater Impacts Impact 10-1: Precise Plan-Related and Cumulative Impacts on Wastewater Treatment and Transmission Capacity--Maximum Intensity Alternative. Precise Plan-facilitated development would increase wastewater generation in the project area. Preliminary estimates indicate that the Maximum Intensity Precise Plan alternative could generate a total of approximately 771,026 gallons of average daily dry weather flow (ADDWF) per day, for a net increase over exiting conditions of 630,885 gpd. Redwood City already uses all of its allocated capacity from the SBSA treatment plant, but possesses an option to purchase an additional 1.915 million gallons per day (mgd) of dry weather capacity. The estimated Maximum Intensity alternative related ADDWF increment of 630,885 gpd (0.631 mgd) is less than the City's purchase option of 1.915 mgd. In recent years, wastewater flow into the SBSA collection system from Redwood City has occasionally exceeded the current peak wet weather flow capacity right (exclusive of Redwood Shores) of 25.9 mgd. Since 1994-95, the City has exceeded its allocated capacity nine times during the winter. Since the SBSA treatment capacity allocation to Redwood City is already being exceeded during wet weather, the current allocation from the SBSA is inadequate to serve the projected Maximum Intensity alternative ADDWF increment in addition to existing SBSA commitments. Because the SBSA treatment capacity allocation to Redwood City is already being exceeded, the Precise Plan Maximum Intensity alternative-related and cumulative impacts on wet weather flow treatment capacity are considered to represent a potentially significant project and cumulative impact. Atty/Reso/Reso.1683 20 14769 030707 Muff #613