IRP Appendix F - Water Supply Operations PDF

Appendix F- Water Supply Operations 7/1/2017 Rapid establishment of a reliable and expandable water supply for the fast water/ coordinated ventilation approach Critical Flow rate- GPM required to suppress a fire in 30 seconds To much water is may waist it/ not enough won’t suppress fire...

Appendix F- Water Supply Operations 7/1/2017 Rapid establishment of a reliable and expandable water supply for the fast water/ coordinated ventilation approach Critical Flow rate- GPM required to suppress a fire in 30 seconds To much water is may waist it/ not enough won’t suppress fire Not generally practical to calculate the critical flow rate Rule of thumb 500 gpm Stream placement may require more smaller lines than 1 large line Gas cooling is not tactic used by MCFRS but use surface cooling for residential structure fires Class A Foam- lowers surface tension allowing more effective uniform cooling-.025% is mixed with water- “enhances water” 2 Water Supply Operations 1) Urban- Fire hydrants 2 units assigned to water supply, operational redundancy rear independent water supply is less likely to impede water supply in front 5th due Engines- “defense in depth”, correct water supply issues 2) Rural - Without hydrants- “longer to develop a sustainable water supply” Requires Exacting and judicious in application of water on burning surfaces Fire uncontrolled by initial attack line- IC - may need to use personnel to create robust water supply, reducing fire fighting ability IC should consider WSO (water supply officer) to focus on fire ground operations Attack Tanker Operations- 1st/ 2nd due/ 1st Tanker, 1st or 2nd Eng. lay in with clappered siamese, 4,000 - 5,000 gallons of water, all water suppling apparatus pump clappered siamese- limited to 500 GPM fire flow, IC may increase ability with additional water sources, relays, or dump tank ops if fire flow demand increase - “sufficient water for search and fire attack operations” General 1. initiate/ secure an uninterrupted water supply for all structure fires that are immediately expandable 2. 1st/3rd Engines must give tentative water supply instructions enroute to the scene 3. Strategies and tactics must match the available water supply when available water is constrained incident priorities take focus- life safety, stabilization and property conservations 4. Consider class A foam for initial attack Urban 1. Forward Lay if practical- all water supplies- 2nd supply must not impede 1st 2. Heavy water hook up (steamer and 1 butt)- all hose used largest available, 4” preferred on butts over 3” 3. 1st Engine- Initial water- Own hydrant (must use soft sleeve) 2nd must ensure and expand as needed 4. Possible master streams- 1st in consider dual lines, 3rd not required if 1st lays duals 5. 1st due charge fire control system as soon as possible, subsequent units charge additional connections, stand pipe before sprinkler system Rural 1. 1st Engine announce fill site, ECC add location to comments cisterns less than 30,000 gallons may not be used as only fill site but maybe used to support operations until others are developed and IC must ensure refilled after use Fill site should be able to fill tankers @ a rate,”at least” 1,000 GPM Hydrants Fill sites- Engine must use pump to fill tankers Avoid common names for fill sites or designations by number 2. RID and Water Supply Task Force at first indication of a ,“working event” 3. 1st Engine forward lay if possible or direct 2nd Engine via radio, units must with clappered siamese Exceptions for 1st Engine- 1) similar arrival of 1st Engine/ 1st  tanker 2) laying in will impede 1st tanker/ 2nd Engine 3) unknown access to structure 4. Attack Tanker Operation- Resource should be concentrated for maximum effect until water supply is established 5. Expanding Water Supply (order of preference) A. On Site Static Source- IC assign Engine to draft and pump attack tanker pump intake, all water carrying apparatus pump siamese until static source is established B. Dump Site Operations- 3rd Engine/ 2nd tanker build dumpsite draft and pump clappered siamese, all water carrying apparatus pump siamese until dump site is established C. Relay Pumping- reliable water source within 3,000’ of clappered Siamese, 1000 GPM or greater and relays over 2,000’ consider dual lines, communicate to the next engine before charging line, Tankers pump siamese until relay is established Units leave access to siamese and park on the same side of the road