Dozers

Steward: Equipment Technology Committee

Intro paragraph

Dozer Typing Standards

Requirements	Type 1	Type 2	Type 3	Type 4
Net HP Range*	240 and up	150 - 250	90 - 165	50 - 110
Minimum Base Weight**	60,000 lbs.	35,000 lbs.	24,000 lbs.	10,000 lbs.
Manufacturer’s published rated net horsepower (HP). Horsepower rating taken at the flywheel with all the engine accessories installed not counting transmission losses or anything after the flywheel *Manufacturer’s published base weight for dozer including equipped track width and blade configuration, equipment fluids, etc. If a published base weight is unavailable, a certified in-service weight shall be used Base operational weight is only used for typing. Final in-service dozer weight will be higher and include additional accessories such as winch, grapple, forestry package, etc. Final in-service dozer weight must be used when calculating hauler capacity, bridge weight limits, etc.

Dozer Fireline Construction Rates (Single Pass) in Chains per Hour

Fire Behavior Fuel Model	Up or Down Slope	Slope Class 1 0-25%	Slope Class 2 26-40%	Slope Class 3 41-55%	Slope Class 4 56-74%
Type 3 Dozer 1, 2	Up	55-90	30-55	8-30	0-8
Type 3 Dozer 1, 2	Down	90-110	90-110	20-90	0-20
3, 5, 8	Up	45-70	25-45	2-25	0-2
3, 5, 8	Down	70-80	65-80	0-65	0
4	Up	20-35	10-20	0-10	0
4	Down	35-40	25-40	0-25	0
6, 7, 9	Up	35-55	15-35	0-15	0
6, 7, 9	Down	55-60	40-60	0-40	0
11, 12	Up	15-25	7-15	0-7	0
11, 12	Down	25-30	10-30	0-10	0
10, 13	Up	8-15	3-8	0-3	0
10, 13	Down	10-15	5-10	0-5	0
Type 2 Dozer 1, 2	Up	85-125	60-85	30-60	0-30
Type 2 Dozer 1, 2	Down	125-145	130-145	75-130	0-75
And so on
Note: Production rates are not precise but vary with conditions. The higher rate can be applied for situations involving: Newer dozers (1975 and later) Dozers in excellent operating condition Most-qualified operators Temperatures below 90 °F Moist soil, few or no rocks No lost time • Indirect fireline Average fire behavior Daylight operations Less resistive vegetative types within each fire behavior fuel model

Table Title???

Dozer	Horse Power	Examples
Type 1	HEAVY: 200 Minimum Horse Power	D-8, D-7, JD-950
Type 2	MEDIUM: 100 Minimum Horse Power	D-5N, D-6N, JD-750
Type 3	LIGHT: 50 Minimum Horse Power	JD-450, JD-550, D-3, D-4
Minimum standards for personnel with dozers will differ depending on fuel type, terrain, and resource configuration. Dozer strike teams may use team leader in place of additional personnel per dozer. Fuel requiring burnout and terrain that requires scouting demands two personnel per dozer.

NWCG Latest Announcements

NEW! S-290, Intermediate Wildland Fire Behavior (Blended) Available Now

Date: Aug 15, 2025
Questions? Please contact:
Fire Behavior Subcommittee

NWCG is excited to announce that the S-290, Intermediate Wildland Fire Behavior (Blended) training is now available on the Wildland Fire Learning Portal. S-290 (Blended) training combines online training and instructor-led training components that support individuals working towards any Single Resource Boss or Fire Effects Monitor incident qualifications.

This second course in the series collectively serves to develop fire behavior prediction knowledge and skills, and provides more detailed information on fuels, weather, and topography that affect wildland fire behavior for safety purposes.

Students are required to finish the prerequisite S-190, Introduction to Wildland Fire Behavior, before enrolling in S-290, Intermediate Wildland Fire Behavior (Blended).

References:

S-290, Intermediate Wildland Fire Behavior (Blended)

S-190, Introduction to Wildland Fire Behavior

Wildland Fire Learning Portal

NEW! S-271, Helicopter Crewmember (Blended) Now Available

Date: Aug 14, 2025
Questions? Please contact:
Interagency Helicopter Operations Subcommittee

The S-271, Helicopter Crewmember (Blended) is now available. Developed through the Incident Performance and Training Modernization (IPTM) effort, this training supports individuals working towards Helicopter Crewmember (HECM) incident qualifications.

S-271, Helicopter Crewmember (Blended) training combines online training and instructor-led training components. This course is designed to provide students with the knowledge and skills necessary to perform the duties of the HECM position, as described in the NWCG Incident Position Standards for Helicopter Crewmember, PMS 350-22.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for January 2026.

References:

S-271, Helicopter Crewmember (Blended)

NWCG Helicopter Crewmember (HECM) Position Page

Wildland Fire Learning Portal

Incident Position Standards and Next Generation Position Task Books Now Available for FBAN and LTAN

Date: Aug 13, 2025
Questions? Please contact:
Fire Behavior Subcommittee

NWCG is excited to announce that Incident Position Standards and Next Generation Position Task Books are now available for Fire Behavior Analyst (FBAN) and Long Term Fire Analyst (LTAN).

The Performance Support Packages for these positions were developed as part of the Incident Performance and Training Modernization (IPTM) effort. These resources support trainees, qualified personnel, and evaluators in their respective roles.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for January 2026.

References:

NWCG Fire Behavior Analyst Position Page

NWCG Long Term Fire Analyst Page

ETC/RMC Safety Bulletin: 25-001 New Guidance on Laundering Wildland Fire Clothing to Reduce Contamination

Date: Aug 8, 2025
Questions? Please contact:
Equipment Technology Committee
Risk Management Committee

The Equipment Technology Committee (ETC) and the Risk Management Committee (RMC) have issued Safety Bulletin 25-001: Laundering to Decontaminate Wildland Fire Clothing. Recent research revealed that wildland fire flame-resistant pants and shirts can be contaminated with chemicals from combustion byproducts, including carcinogens, and that common laundering practices can effectively remove these harmful contaminants from wildland firefighter clothing more effectively than previously understood. It is recommended to decontaminate wildland fire clothing as frequently as possible.

Frequently Asked Questions about this new information and how to implement recommendations can be found on the NWCG Alerts page. Read the complete ETC/RMC Safety Bulletin: 25-001 to learn more.