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Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment

Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment. Project Funded by the Plumas NF with USDA Forest Service’s “Community Protection” program funds to reduce fuels on 50 acres. Plumas County. Wildland Fire Behavior Factors. * Fire Intensity - (Flame Length (FL) in feet)

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Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment

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  1. Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment Project Funded by the Plumas NF with USDA Forest Service’s “Community Protection” program funds to reduce fuels on 50 acres. Plumas County

  2. Wildland Fire Behavior Factors *Fire Intensity -(Flame Length (FL) in feet) *Crowning Potential -(FL + Crown to base height) *Spotting Potential - (FL + Crowning = ember production) * Resistance to Control (RTC) - (FL + spotting + volume of fuel) Plumas County

  3. Fuelbed Factors Affecting Intensity, Crowning & Spotting Potential test • Fuel Loading (Tons/acre by size) • Fuel Arrangement (Horizontal & Vertical) • Fuel Layers(Surface-Ladder-Canopy) Plumas County

  4. Delleker North HFR Mechanical Commercial Thinning of Stands • Surface Fuels –Scattered brush and heavy pockets of • needles were disturbed, masticated and compacted in operations. • Ladder Fuels – Trees were mechanically thinned. • Small trees were cut and chipped as biomass • Trees greater than 12-14” were harvested as sawlogs • Canopy Fuels – Trees were thinned and harvested.

  5. Delleker North HFR Commercial Thinning of Stands Pre-Treatment - Plot 1 Expected Fire Conditions Surface Flame Length = <4 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = Moderate

  6. Delleker North HFR Commercial Thinning of Stands Post Treatment - Plot 1 Expected Fire Conditions Surface Flame Length = 2-4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low

  7. Delleker North HFR Commercial Thinning of Stands Pre-Treatment - Plot 2 Expected Fire Conditions Surface Flame Length = 4-5 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = High

  8. Delleker North HFR Commercial Thinning of Stands Post-Treatment - Plot 1 Expected Fire Conditions Surface Flame Length = <4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low

  9. Delleker North HFR Commercial Thinning of Stands Pre-Treatment - Plot 3 Expected Fire Conditions Surface Flame Length = 4-5 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = High

  10. Delleker North HFR Commercial Thinning of Stands Pre-Treatment - Plot 3 Expected Fire Conditions Surface Flame Length = 4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Moderate

  11. Delleker North HFR Mastication of non-commercial stands • Surface Fuels – Brush and scattered trees were rearranged in the masticating operation. • Ladder Fuels –Trees were mechanically thinned by a masticator to a spacing of approximately 20 feet. • Canopy Fuels –Due to stand conditions, no trees harvested as sawlogs.

  12. Delleker North HFR Mastication of non-commercial stands Pre-Treatment Expected Fire Conditions Surface Flame Length = 4-6 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = High

  13. Delleker North HFR Mastication of non-commercial stands Post Treatment Expected Fire Conditions Surface Flame Length = 2-3 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low

  14. Delleker North HFR Mastication of Prior Activity Slash in Commercially Thinned Stands • Surface Fuels – Pockets were rearranged in masticating operation. • Ladder Fuels – Mechanically thinned in earlier harvesting activity. • Canopy Fuels - Mechanically thinned in earlier harvesting activity.

  15. Delleker North HFR Prior Activity Slash in Commercially Thinned Stands Expected Fire Conditions Surface Flame Length = 4-6 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Moderate

  16. Delleker North HFR Mastication of Prior Activity Slash in Commercial Thinning Stands Expected Fire Behavior Surface Flame Length = 1 foot Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low

  17. Delleker North HFR Mastication of Prior Activity Slash in Commercially Thinned Stands Pre Existing Slash Slash following Mastication Fuelbed Changes Fuelbed height was lowered, fine fuels were broken down & dirt was mixed into the fuel. Projected flame lengths dropped from 4-6 feet to 1 foot

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