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Downhill Fireline Construction Checklist

 

Building fireline downhill requires special attention to safety factors because of the potential for rapid uphill fire spread. This Watch Out depicts firefighters building fireline downhill without first mitigating the existing hazards.

9. Building fireline downhill with fire below. Three firefighters use tools to dig fireline down a steep slope covered in grass and brush. Large flames are below them as the fire burns uphill.

9. Building fireline downhill with fire below.

Read about all 18 Watch Out Situations.

 

Downhill fireline construction is hazardous in steep terrain, fast-burning fuels, or rapidly changing weather. Downhill fireline construction should not be attempted unless there is no tactical alternative. When building downhill fireline:

  • Crew supervisor(s) and fireline overhead must discuss assignments prior to committing personnel. Qualified, responsible overhead individuals such as a Task Force Leader (TFLD) or an Incident Commander Type 4 (ICT4) at minimum, will stay with resources until the job is completed.
  • Decisions about downhill fireline construction will be made only after proposed fireline has been scouted by supervisor(s) of involved crew(s).
  • Lookouts, Communications, Escape Routes, and Safety Zones (LCES) will be coordinated for all personnel involved. This includes verifying:
    • Crew supervisors are in direct contact with lookout(s) who can see the fire.
    • Communication is established between crews.
    • Rapid access to safety zones is ensured in case fire crosses below crews.
  • Direct attack will be used whenever possible; if not possible, the fireline should be completed between anchor points before being fired out.
  • Fireline will not lie in or adjacent to a chute or chimney.
  • Starting point will be anchored for crews building fireline down from the top.
  • Bottom of the fire will be monitored; if the potential exists for the fire to spread, action will be taken to secure the fire edge.
  • Before carrying fire with you, ensure it can be done safely.

 

Category
Operational Engagement
References
10 Standard Firefighting Orders, PMS 110
18 Watch Out Situations, PMS 118
10 and 18 Poster, PMS 110-18

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Updated NWCG Guide for Wildland Fire Modules, PMS 431

Date: May 14, 2025
Questions?  Please contact:
Fire Use Subcommittee

The updated NWCG Guide for Wildland Fire Modules, PMS 431 serves as a supplemental resource for wildland fire module operations, providing information frequently used in the field.

PMS 431 defines the organizational structure, staffing, and qualifications for Type 1 and Type 2 Wildland Fire Modules, outlining their roles in wildland fire suppression, prescribed fire, and resource management. The NWCG Guide for Wildland Fire Modules, PMS 431, should be used in conjunction with the NWCG Standards for Wildland Fire Module Operations, PMS 430.

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NWCG Guide for Wildland Fire Modules, PMS 431

NWCG Standards for Wildland Fire Module Operations, PMS 430

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Date: May 13, 2025
Questions?  Please contact:
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The NWCG Standards for Wildland Fire Resource Typing, PMS 200 has been updated to include newly developed Off-Highway Vehicle (OHV) typing standards. These standards organize OHV information into logical categories and outline key safety requirements for occupants.

NWCG Standards for Wildland Fire Resource Typing, PMS 200 establishes minimum typing standards for aircraft, crews, and equipment used in national mobilization to wildland fire incidents. Typing designations are assigned based on measurable capability and performance criteria.

References:

NWCG Standards for Wildland Fire Resource Typing, PMS 200

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Date: May 12, 2025
Questions?  Please contact:
Risk Management Committee

The S-204, Interpersonal and Critical Thinking Skills for Safety Officers self-directed online course is now available! Developed through the Incident Performance and Training Modernization (IPTM) effort, this training supports individuals working towards Safety Officer, Field (SOFF) incident qualifications.

S-204, Interpersonal and Critical Thinking Skills for Safety Officers focuses on facilitating hazard mitigation conversations and building trust to influence safety-related decisions. Individuals can self-enroll through the Wildland Fire Learning Portal (WFLP).

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1.

References:

S-204, Interpersonal and Critical Thinking Skills for Safety Officers 

NWCG Safety Officer, Field (SOFF) Position Page

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Date: May 7, 2025
Questions?  Please contact:
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Phone: (208) 387-5104
Fax: (208) 387-5573

The Great Basin Cache (GBK) is transitioning to a new inventory system to better serve the wildland fire community. During this upgrade, GBK will be unable to process standard orders from Part 1: Fire Supplies and Equipment and Part 2: Publications between May 8-20, 2025, with exceptions made for emergency fire orders. Orders will be accepted through close of business May 7.

To browse the latest available items, please refer to the National Fire Equipment System (NFES) catalogs. 

References:

NWCG NFES Catalog-Part 1: Fire Supplies and Equipment, PMS 449-1

NWCG NFES Catalog-Part 2: Publications, PMS 449-2