Mann Gulch - August 5

Category: 
This Day in History
Page Last Modified / Reviewed: 
Aug 2019

 

This Day in History is a brief summary of a powerful learning opportunity and is not intended to second guess or be judgmental of decisions and actions. Put yourself in the following situation as if you do not know what the outcome will be. What are the conditions? What are you thinking? What are YOU doing?

Incident Summary:

August 4th, 1949 – Lightning started many fires on the Helena National Forest including one near the top of a ridge between Meriwether and Mann Gulches. At 12:55 pm August 5th, the fire was observed at six acres. At 1:30 pm the call went out for smokejumpers from the Missoula jumpbase. By the time the jump plane flew over at 3 pm the fire was 60 acres. The crew jumped and was scattered by a nearby thunder cell.

The crew gathers at the bottom of the gulch up-canyon of the fire. Jumper Foreman goes to scout the fire and meets up with a fire guard working alone near the head of the fire. Observing increased fire activity, the decision is made to start from the toe. While hiking to the toe, the foreman noted that there was fire below them in the gulch and that it had crossed to the other side of the canyon blocking their ability to escape to the river. They reversed direction and headed up toward the NW ridge. The fire is 500 feet behind them crowning in timber and doghair thickets.

The foreman knows that they will not outrun the fire and starts to burn off some grass for a “refuge”. He gives the order for his crew to come into the black with him. The foreman stayed in his black and survived the fire passing over. It is not clear how many of the crew heard the orders over the roar of the fire or understood what the foreman was trying to do (burning out was neither taught nor common practice at this time). The crew continued running up the steep slope for the ridge. Two made it to safety in rocks at the top. 5:56 pm marks the time on one firefighter’s watch that stopped when the 15 Missoula Smokejumpers and one Meriwether Fire Guard were burned over. Only five would survive the blow-up. Two would die from their burns the next day.

This Day in Wildland Fire History is dedicated to all those at Mann Gulch August 5th, 1949.


Discussion Points:

Predicted Fire Danger was “low” but readings from a nearby ranger station were RH=22%, fuel sticks = 5%, and wind=16 mph indicating more severe fire danger. No weather was recorded at the fire, but steady SW winds were observed at the time of the jump. The Gulch runs SW down to the Missouri River. Also note the thunder cell that was in the area.

  • Open your IRPG to page 1. Based on the above information coupled with the increase in fire size, use the Risk Management Process and the map (below) to discuss some of the actions you will take to ensure crew safety: as the FFT2, squad boss, crew boss, etc.
     

Based on initial aerial size-up, the strategy was to hold the fire on the ridge by anchoring the head of the fire and flanking down both sides to the toe. The fire was noted as “appearing relatively quiet”.

  • Discuss other tactics that your crew could use if presented with a similar situation. Look at the different options available at different steps of the initial attack.
     

Though his ability as a firefighter was well respected by his peers, the Foremen was not known by this young group of smokejumpers.

When we find ourselves is this position (such as a Crew Boss assignment) what can we do to create and encourage crew cohesion?

image map of the routes and location of firefighters on the Mann Gulch fire.

 

Additional Resources

Incident Management Situation Report (IMSR)
Incident Response Pocket Guide (IRPG), PMS 461
NWCG Standards for Helicopter Operations, PMS 510
RT-130, Wildland Fire Safety Training Annual Refresher (WFSTAR)
Interagency Standards for Fire and Fire Aviation Operations (Red Book)
Wildland Fire Lessons Learned Center

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