ISO Public Protection Classification versus 2012 Results

Transcription

1 ISO Public Protection Classification 2002 versus 2012 Results

2 Development Since 2002 Blue Creek Ranch PUD Blue Heron Subdivision Callicotte Ranch Clark Subdivision Cleveland Place Cleveland Place II Colorado Place - Phase I Delores Street Lofts, Building A Edelman Enterprises, Phase 1 Elk Springs Filings Elk Springs, Filing 8, Phase 1 Keator Grove Lines Plaza II Mayfly Bend Ranch Mountain Sage Townhomes Panorama Reserve Subdivision Pinyon Mesa Ranch at Coulter Creek River Valley Ranch - Phase 6 Blk Y River Valley Ranch - Phase 7 & 8 Town Center Westridge Homestead Sub. 665 Residential Units, 29 Commercial Units

3 Criteria for Distribution of Companies To reduce property damage from a fire, the firefighters need to get to the scene quickly. Therefore, ISO evaluates the distribution of fire stations in each community. Item 560 of the Fire Suppression Rating Schedule (FSRS) provides the criteria: 560. DISTRIBUTION OF COMPANIES (DC): The built-upon area of the city should have a first-due engine company within 1-1/2 miles and a ladder-service company within 2-1/2 miles. ISO establishes "standard response districts" around each existing fire station. The standard response district for an engine company is a polygon defined by streets leading from the fire station out to a distance of 1.5 road miles. For a ladder-service company, the standard response district is a polygon defined by streets out to a distance of 2.5 road miles. For each fire station, we count the fire hydrants within the standard response district. When fire hydrants are not available, we measure the total linear road miles in the standard response district. We then identify contiguous built-upon areas in the community that do not have a fire station within the specified distance. If such an area has at least 50 percent of the number of fire hydrants (or, in areas without hydrants, 50 percent of the linear road miles) found in the standard response district, we consider that the area may need a fire station.

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5 ISO Survey 2002 vs. 2012

6 Review Involves Complex Calculations EC = Engine Company Equipment EE = Number of Existing Engine Companies AE = The percent of built-upon area within 1½ road miles of a first-due engine, engineladder, or engine-service company LCE = Ladder Company Equipment SCE = Service Company Equipment ESCE = Engine Ladder Company Equipment ELSE = Engine Service Company Equipment EL = Existing Ladder Companies ES = Existing Service Companies AL = The percent of the built-upon area within 2½ road miles of a first-due ladder, service, engine-ladder, or engine-service company NGL = The assigned points for any additional Ladders needed for existing Service Companies

7 Needed Engine Companies Increased from 5 to 11 Existing Engine Companies Increased Number from 5 to Page 17, Item Item 513

8 2012 Page 13, Item 421 Demand Upon Dispatch Centers Increased 2002 Item 422

9 Need for additional Reserve Pumpers increased from 2002 to Page 19, Item Google Earth

10 Need Ladders Companies Increased to 1 Credit for Ladder Service Increased from 34% to Page 20, Item Item 549

11 Need Service Companies Increase form 2 to 3 Credit for Service Company Increased from average 0.17 to Page 21, Item Item 549

12 Credit for Supply System - Needed Fire Flows (NFF) Increased in Some Areas

13 District Maintained Fire Department Supply (FDS) Rating For Hauled Water

14 FDS Analysis Involves 25 Fire Sites Throughout the District

15 Response Procedure Worksheets Provide for Each Site

16 All District Apparatus Necessary for FDS Rating

17 ISO Survey 2002 vs. 2012

18 Value of Improvements

19 Number of Structures Potentially Affected by FDS & PC Ratings Note: PC-5: within 1,000 feet of creditable water source and within 5 miles of a station. PC- 9: more than 1,000 feet of creditable water source and within 5 miles of a station. Currently rated PC-5 based upon hauled water FDS. PC-10: more than 5 miles from a station

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21 Response-Time Considerations In evaluating a community's public fire protection, ISO considers the distribution of fire companies. Generally, ISO's criteria say that a built-upon area of a community should have a first-due engine company within 1.5 road miles of the protected properties and a ladderservice company within 2.5 road miles. Those benchmark criteria produce an expected response time of 3.2 minutes for an engine company and 4.9 minutes for a ladder-service company, based on a formula developed by the RAND Corporation. RAND conducted extensive studies of fire department response times. They concluded that the average speed for a fire apparatus responding with emergency lights and siren is 35 mph. That speed considers average terrain, average traffic, weather, and slowing down for intersections. Taking into account the average speed and the time required for an apparatus to accelerate from a stop to the travel speed, RAND developed the following equation for calculating the travel time: T = D where T = time in minutes to the nearest 1/10 of a minute 0.65 = a vehicle-acceleration constant for the first 0.5 mile traveled 1.7 = a vehicle-speed constant validated for response distances ranging from 0.5 miles to 8.0 miles. D = distance

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