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12/06/2010 <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 suffer <br />damage 2 , 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, or 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 prevailing 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 Assessing Weaknesses in Its <br />Water Delivery System and for Completing Capital Projects Increases the Risk of Service <br />Disruptions and Water Shortages California State Auditor / Bureau of State Audits, Report <br />Number 99124. <br />3 Generalized from maps dam owners are required to prepare and file with the State Office of <br />Emergency Services and available through the Association of Bay Area Governments (ABAG). <br />4 Source: National Weather Service, Western Regional Climate Center, Desert Research <br />Institute, 2215 Raggio Parkway, Reno, Nevada 89512, (775) 674 -7010. <br />ATTY /RESO /RESO.2066 6 #15070 <br />111510 MUFF # 305 <br />