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Week of Remembrance

Hazard Tree - No Work Zones

 

No work zone (NWZ) graphic showing a large circle shaded with a NWZ clear circle on right side within shaded area indicating the potentially dangerous tree or high-value wildfire area.

Knowing the exact time a given hazard tree (or compromised section) will fail is extremely difficult, and is, in many cases, an unpredictable task. Given this fact, we need to manage firefighters’ exposure to these hazards by creating a safe work area or No Work Zone (NWZ). The size and extent of the NWZ must be determined by onsite conditions, such as terrain, stand structure, and fire impacts on the tree and adjoining trees.

When an identified hazardous tree or trees cannot be felled, then perform an assessment of which areas have too high a risk, and post a lookout to warn the personnel to stay clear of these areas while working in adjacent areas. If hazard still exists before leaving the area, flag the NWZ so that personnel entering the area will be able to recognize the hazard. Use the following failure zone illustrations as examples to help manage firefighter exposure to these identified hazards. Also, remember to include the possibility of the Domino Effect to surrounding trees.
 

Figure 1 - 1 1/2 X Height of snag    Figure 2 - 1 1/2 X Trunk-to-branch-tip distance      Figure 3 - 1 1/2 X Length of dead top   
Figure 1 - graphic showing the potential failure zone of a dangerous area around a snag tree. Figure 2 - graphic of a tree showing the distance of dead limb hazard area. Figure 3 - graphic showing a pine tree with potential failure zone of the dead top.

         

         

 

Category
Felling Safety
References
Hazard Tree and Tree Felling Subcommittee


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NWCG Latest Announcements

2024 Week of Remembrance

Date: June 27, 2024
Contact: 6 Minutes for Safety Subcommittee 

As we approach the 2024 Week of Remembrance (WOR), June 30 to July 6, we dedicate this time to thoughtfully reviewing and recognizing the events of the 2018 Mendocino Complex. As such, this year’s theme of “Learning From the Mendocino Complex” embodies a longstanding hallmark of WOR, honoring through learning.

Throughout the week, our energy will be directed toward fostering generative conversations in briefing rooms and at tailgates.

References:

6 Minutes for Safety - 2024 Week of Remembrance

Wildland Fire Lessons Learned Center

Updated NWCG Wildland Fire Risk and Complexity Assessment, PMS 236

Date: June 24, 2024
Contact: Incident and Position Standards Committee 

The June 2024 update of the NWCG Wildland Fire Risk and Complexity Assessment, PMS 236, is now available to meet the current needs for incident management typing.

The NWCG Wildland Fire Risk and Complexity Assessment should be used to evaluate firefighter safety issues, assess risk, and identify the appropriate incident management organization based on incident complexity. Assessing risk, determining incident complexity, and identifying an appropriate incident management organization is a subjective process based on examining a combination of indicators or factors, which can change over time.

References:

NWCG Wildland Fire Risk and Complexity Assessment, PMS 236

Operations Branch Director (OPBD) Next Gen PTB Available

Date: June 10, 2024
Contact: NWCG Feedback 

The NWCG Position Task Book for Operations Branch Director (OPBD), PMS 311-109 is now available for use within the OPBD position qualification pathway. As part of the transition to Complex Incident Management (CIM), the OPBD Next Gen PTB was developed and the position qualification pathway updated.

More information about the Next Gen PTB format can be found on the NWCG Position Task Book webpage.

References:

Operations Branch Director Position Page

Operations Branch Director Next Gen PTB

NWCG Position Task Books

Updated NWCG Standards for Interagency Incident Business Management, PMS 902

Date: June 5, 2024
Contact: NWCG Incident Business Committee 

The 2024 revision of the NWCG Standards for Interagency Incident Business Management, PMS 902 is now available. The uniform application of interagency incident business management standards is critical to interagency fire operations. PMS 902 assists NWCG agencies in constructively working together to provide effective execution of each agency's incident business management program.

References:

PMS 902