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i <br /> 7.B , <br /> Page 19 <br /> control in large buildings would be inoperative, thereby resulting in loss of life <br /> and/or major losses in such buildings. <br /> Additional potential situations inherent in such an occurrence include loss <br /> of city water resources; Hetch—Hetchy Bay Division Pipelines No. 1 and 2, and <br /> Hetch-Hetchy Bay Division Pipelines No. 3 and 4 would be expected to suffe� <br /> damage along with inundated areas caused by the failure of earthen dams such <br /> as Lower Emerald Lake (Latitude 37° 28.0' N; Longitude 122° 23.2' W) and Bear <br /> Gulch (Latitude 37° 26.0' N; Longitude 122° 13.6' W) underground water main <br /> breaks due to soil movement; cylindrical water storage tank failures due to <br /> "elephant's foot" buckling, weakening from corrosion, ar sloshing of contents; <br /> broken natural gas mains causing structure and other fires; leakage of hazardous <br /> materials; the need for rescue from collapsed structures; and the rendering of <br /> medical aid to large numbers of people. <br /> The protection of human life and the preservation of property in the event <br /> of such occurrence support the imposition of fire-protection and life-safety <br /> requirements greater than those set forth in the 2010 Edition of the California Fire <br /> Code. <br /> Finding 3: The seasonal climatic conditions during the late summer and <br /> fall create numerous serious difficulties regarding the control of and protection <br /> against fires in the City of Redwood City. Although the city has experienced an <br /> annual mean rainfall of 20.21 inches since 1948, one can anticipate no <br /> measurable precipitation at all during the summer months. The dry period <br /> average maximum temperature is 82.7 degrees Fahrenheit with an extreme <br /> maximum of 110 degrees Fahrenheit. These temperatures are often <br /> accompanied by light to gusty prevaifing westerly to northwesterly winds. These <br /> dry winds, mixed with the natural vegetation which is predominant throughout the <br /> area, creates a hazardous fuel condition which has caused extensive grass and <br /> brushland fires. With more and more development encroaching into these <br /> wooded and grass covered areas, wind driven fires could have severe <br /> consequences as shown on many occasions in other areas of the state. <br /> Recorded weather patterns indicate that the average annual rainfall cannot be <br /> relied upon. Water shortages and water rationing may result as was experienced <br /> during recent drought years. <br /> While some code requirements, such as fire-resistive roof classification, <br /> have a direct bearing on building survival in a wildland fire situation, others such <br /> 2 San Francisco Public Utilities Commission: Its Slow Pace for Assessinq Weaknesses in Its <br /> Water Deliverv Svstem and for Completinq Capital Proiects Increases the Risk of Service <br /> Disruptions and Water Sho�tapes, California State Auditor / Bureau of State Audits, Report <br /> Number 99124. <br /> 3 Generalized from maps dam owners are required fo prepare and file with the State Office of <br /> Emergency Services and available through the Association of Bay Area Governments (ABAG). <br /> ° Source: National Weather Service, Western Regional Climate Center, Desert Research <br /> Institute, 2215 Raggio Parkway, Reno, Nevada 89512, (775) 674-7010. <br /> ATTY/RESO/RES0.2066 6 <br /> 111510 <br />