Firefighters use innovative tactic to suppress Martin Fire

The fire has burned approximately 425,000 acres in Northern Nevada

(Originally published at 9:07 a.m. MDT July 10, 2018)

When a wildfire reaches 100,000 acres we often refer to it as a “megafire”. But what name do we put on a fire when it is four times the megafire threshold? The incident management team on the Martin Fire in Northern Nevada estimates their fire has burned approximately 425,000 acres. (I think we should reserve “gigafire” for a 1 million-acre fire.)

According to the National Situation Report there are only 634 personnel assigned. That is extremely low density of firefighters for such a huge fire — it stretches for 56 miles, west to east. Let’s assume for a moment that the perimeter is 150 miles (it is probably more). If so, that is about three people per mile of fireline, not including support personnel. However with mostly light fuels, there is less mop up after the spread is stopped, requiring fewer personnel.

map martin fire
The perimeter of the Martin Fire at 8:49 p.m. MDT July 10, 2018. The yellow line was from the previous day.

With the long distances, limited numbers of firefighters, and what may be difficult access, firefighters on the Martin Fire say they have developed an innovative approach to containing the blaze.

Firefighters know that air tankers and helicopters dropping water or retardant do not put out fires. Under ideal conditions they can slow them down enough to allow ground-based firefighters the opportunity to move in and actually put out the fire in that area. If there is no ground support working with the aircraft, the chances of success are very low. Reading between the lines of an update about the fire (embedded farther down) it appears that firefighters realized that in some instances the fire was spreading beyond retardant drops. It is not clear if the fire burned through the retardant, spotted over, or burned around the retardant.

martin fire retardant lines
Photo uploaded to InciWeb July 8, titled: “Martin Fire Crossing Retardant Lines”.

The tactic they decided to deploy involved using a combination of water-scooping air tankers, retardant-dropping air tankers, and firefighters building line on the ground. Aircraft that drop water, helicopters or fixed wing, apply it directly to the flaming front, since dropping it out ahead of the fire is often not effective since it does not adhere to the vegetation or have a long-term effect like retardant.

Here is how they described what they did:

Crews and equipment are making excellent progress building containment lines along the southeast flank of the fire. Due to the heavy, fine fuel loads, high winds and extremely fast fire rates of spread, an innovative tactic has been developed to combat these conditions using a three-prong attack. First, a long line of water is laid down by super scoopers, immediately followed by a retardant drop from air tankers. The approaching fire is thus cooled sufficiently that dozers and crews can safely and immediately dig a containment line right up against the side of the retardant line facing away from the flame front. Very close timing and coordination of air drops of water and retardant with ground forces has been proven to be the most effective tactic in these volatile burning conditions.

The part that may be innovative is slowing the flaming front with scooping air tankers AND then putting retardant just outside the edge of the fire. And as usual, quick followup by ground forces is essential.

Here are links to videos shot on the Martin Fire of drops by a DC-10 and two water scoopers.

Is it interesting that these firefighters, like many others in Canada and Europe, know that water-scooping air tankers are a very important tool in the toolbox. However, this year the U.S. Forest Service decided not to have any of them on exclusive use contract. The ones being used thankfully were available on a Call When Needed contract. And the number of retardant-dropping large air tankers on EU contracts were cut by one-third over last year.

They are also having success on the Martin Fire using a local task force:

Yesterday, fire spread slowed significantly due to the hard work of the local Elko Task Force that hit the head of the fire early Sunday morning and throughout the day. The task force took advantage of the fire naturally slowing as it entered flatter terrain with lesser fuel loads. Operations personnel report that the fire is moving into patches of greener vegetation such as Siberian wheat grass, which was planted as part of the BLM’s rehabilitation and fuel treatment efforts on previous fires. Green fuels slow the fire’s advance, making it easier for bulldozers and engines, with the aggressive assistance of super scooper air tankers and heavy and light helicopters, to catch up and get containment lines in place.

The head of the fire on the east side has approached and so far has not crossed the major drainage in the 3-D map below, thanks, no doubt, to the points brought out in the preceding quote.

map martin fire
A 3-D map showing the perimeter on the east side of the Martin Fire at 8:49 p.m. MDT July 10, 2018. The yellow line was from the previous day.

The Martin Fire is bringing in Beth Lund’s Type 1 Great Basin Management Team to handle the east side, while Taiga Rohrer’s Type 2 Great Basin Incident Management Team will continue to take care of the west side.

Martin Fire grows to almost 400,000 acres

Above: screenshot from the video of the Martin Fire.

(UPDATED at 8:58 a.m. MDT July 9, 2018)

A new map of the rapidly growing Martin Fire in Northern Nevada reveals that it has exploded to 399,429 acres, according to the Incident Management Team. During an overnight fixed wing mapping flight some areas of light vegetation burned and then cooled, again making it difficult to fill in some of the holes where no heat was detected by the sensors.

The Martin Fire is 57 miles long, west to east.

map martin fire nevada
Map showing heat detected on the Martin Fire. The most current data was collected at 1 a.m. MDT July 9, 2018.
DC-10 drop retardant Martin Fire
A DC-10 makes a retardant drop on the Martin Fire. Photo uploaded to InciWeb June 6, 2018.

(UPDATED at 6:30 a.m. MDT July 9, 2018)

The incident management team has posted an updated map of the Martin Fire on InciWeb.

(UPDATED  at 6:50 p.m. MDT July 8, 2018)

According to satellite data acquired at 1:54 p.m. MDT Sunday the Martin Fire in Northern Nevada was extremely active at that time. It may have progressed over 20 miles during the previous 24 hours, reaching a total length of approximately 54 miles, west to east. At 1:54 p.m. it was 13 miles west of highway 11/226. Our very, very unofficial guestimate of the size at that time was about 380,000 acres. This is difficult to determine, because much of the vegetation that is burning is light, and can burn and then cool before the next infrared-sensing satellite overflight, occurring about every 12 hours. Our guess involved assuming some of the “unburned” holes had actually burned, but were undetectable by the satellite.

The map below shows approximately the same area as the one farther down dated July 7.

Martin Fire, July 7, 2018
Martin Fire, July 7, 2018.

(UPDATED at 2:21 MDT July 8, 2018)

InciWeb is saying the Martin Fire has burned 164,000 acres but this map puts it at over 239,000 acres.

(Originally published at 1:45 p.m MDT July 8, 2018)

The robotic cameras operated by the Nevada Seismological Lab  have scored again, capturing some great time-lapse video of the Martin Fire in Northern Nevada as pyrocumulus clouds are being created. The video was shot from 6 to 7 p.m. on July 7, 2018.

The Martin Fire has burned 164,000 acres according to InciWeb, and on Saturday it spread from Humboldt County into Elko County.

Martin Fire map Fire perimeter produced by the Incident Management Team. Text notations by Wildfire Today.