<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body dir="auto">
<div dir="ltr"><span></span></div>
<div dir="ltr">Electrical arcing happens around the country. The difference is that California, through years of unwise restrictions on vegetation control, has millions of acres of dry fuel near these powerlines. </div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);"><br>
</span></div>
<div dir="ltr"><span style="background-color: rgba(255, 255, 255, 0);">In the early 1990s, a series of restrictions were placed on logging in the West to protect the Spotted Owl. As it turned out, nature was more complicated than expected, with owl numbers
continuing to decline—even after the California timber harvest plummeted— reportedly due to predation from other raptors. It’s not easy to manipulate Mother Nature :)</span></div>
<div dir="ltr">
<p style="box-sizing: border-box; margin: 1.2rem 0px;"><span style="background-color: rgba(255, 255, 255, 0);">In the meantime, tree harvests fell below the growth rate in the 1990s, to now one-tenth of what it was in 1988 on Federal lands. Thus the enormous
spike in fuel, that is the primary driver behind the massive fires. </span></p>
<p style="box-sizing: border-box; margin: 1.2rem 0px;">Those of us who operate data facilities, such as radio vaults, on California mountaintops, have dealt with this problem as a growing threat over decades. I have antennas with melted radomes just from the
<i>radiant</i> fire heat a half mile away. We’re constantly fighting the government to control vegetation overgrowth around our sites, and are often prevented from doing so.</p>
<div id="AppleMailSignature" dir="ltr"> -mel </div>
<div dir="ltr"><br>
On Oct 10, 2019, at 12:07 AM, Radu-Adrian Feurdean <<a href="mailto:nanog@radu-adrian.feurdean.net">nanog@radu-adrian.feurdean.net</a>> wrote:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr"><span>On Thu, Oct 10, 2019, at 08:02, Mel Beckman wrote:</span><br>
<span></span><br>
<blockquote type="cite"><span>The fire risk is from electrical transmission lines, not from end users
</span><br>
</blockquote>
<blockquote type="cite"><span>of electrical power. The underlying problem is that the State’s rules
</span><br>
</blockquote>
<blockquote type="cite"><span>for line separation were ill-considered, making it possible for
</span><br>
</blockquote>
<blockquote type="cite"><span>high-enough winds to cause “line slapping” and the resultant arcing
</span><br>
</blockquote>
<blockquote type="cite"><span>that ignite fires. </span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>There is no reason to think that end users are of any particular risk,
</span><br>
</blockquote>
<blockquote type="cite"><span>and fuel delivery during a preemptive outage wouldn’t be impaired,
</span><br>
</blockquote>
<span></span><br>
<span>That looks like a situation that you don't often encounter elsewhere (where electricity - distribution, telecom and transport are not very far from one another).</span><br>
</div>
</blockquote>
</div>
</body>
</html>