Defensible space and fire mitigation in Glenbrook, NV

Glenbrook sits in a forested bowl on Tahoe's east shore, below Spooner Summit on US 50. Of the 278 buildings the Forest Service counts there, all but a handful are rated as directly exposed. There is almost no interior of the community sheltered by other cleared lots.

At a glance

• 98.9% of buildings directly exposed, the highest share in our service area
• Glenbrook station: about 18.5 inches of precipitation a year
• Tree permits for defensible space: Tahoe Douglas Fire Protection District
• About 21 miles from our yard, the nearest Tahoe community to us

Why the outer zone matters most in Glenbrook

In many towns the bigger worry is embers, and the first 5 feet does most of the good. Glenbrook is different. Directly exposed means forest or brush stands close enough for flame itself to reach the building. The answer to that is distance and separation: fewer small trees, no dead wood, shrubs broken into islands and no ladder of low limbs from the ground into the crowns, all the way out to 100 feet or the property line.

Zone 0 still comes first on the day, since it is quick and it protects against embers too. But the estimate here is usually driven by Zone 2.

What can be thinned without a permit?

Tahoe Regional Planning Agency rules set the frame. A live tree over 14 inches in diameter at breast height needs a permit, and on lakeshore lots the limit is 6 inches for trees between the house and the lake. Branches in the upper two-thirds of a tree need a permit too, with exceptions for limbs near structures, utility conflicts and dead wood. A dead tree that could fall on a house needs no permit.

For defensible space, TRPA says the local fire agency can permit removals. On the Nevada south and east shore that is the Tahoe Douglas Fire Protection District. Have the evaluation done first and send us the result with your estimate request. The agency decides.

More rain means more regrowth

The Glenbrook weather station, less than a mile from the center of the community, averages about 18.5 inches of precipitation a year in NOAA's 1991 to 2020 normals. Carson City's station averages about 9.3. More moisture grows more brush and more seedlings, so a cleared lot here does not stay cleared. Plan on a lighter return visit every year or two.

Dead conifers are the first thing to take out of any zone. If needles on a pine or fir are turning red or brown from the top down, have it looked at: see bark beetles in pines and fir engraver beetle.

Propane tanks and private roads

About three in four Glenbrook households heat with bottled gas (American Community Survey; fewer than 400 residents, so approximate). Clearing needles, brush and low limbs from around the tank is a small item to add to the list. Your propane supplier or the fire district can tell you the clearance the tank needs.

If your road is private or gated, let the office know how the crew gets in, whether the association has to approve the work and where a chip truck may park.

Fires mapped near Glenbrook

Nine perimeter records of 300 acres or more since 1980 have centers within about 10 miles. The largest is the Waterfall Fire of 2004 at 8,765 acres, on Carson City's west side. The others include the Highway 50 Fire of 2003 at 588 acres, centered about 8 miles away, the Voltaire Fire of 2018 at 517 acres and the Gondola Fire of 2002 at 643 acres. Risk to homes in Glenbrook ranks higher than 97.6% of US communities.