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Action Alert: Green Diamond Clearcuts Threaten Humboldt Marten in Klamath Glen

Updated: Aug 28, 2023


Take Action: Green Diamond clearcuts—that’s pretty clear-cut. What’s not, perhaps, are the consequences of its clearcuts, as the company strives to spin whatever mythology it can muster to convince agency regulators and the public at-large that there’s nothing to be seen and no harm being done.


In late November 2018, Green Diamond submitted THP 1-18-177DEL, “Arrow Mills,” THP, totaling 125 acres of timber harvest in Upper and Lower Turwar Creek at Klamath Glen, just up-river of the town of Klamath, CA. Of the total 125-acre THP, 104 acres is proposed for clearcutting.


The “Arrow Mills” THP threatens significant adverse impacts to a number of rare, threatened, and endangered species, including northern spotted owls, marbled murrelets, osprey, and even ruffed grouse, all of which are known to exist and have been observed in the vicinity of the THP. Of particular concern to EPIC are the potentially significant adverse impacts the THP will have on the critically-imperiled Humboldt Marten.


The “Arrow Mills” THP and its over 100 acres of clearcutting are proposed within the known Extant Population Area (EPA) for the Humboldt Marten, and within a Green Diamond-designated, “Marten Special Management Area,” (MSMA). Sadly, there’s absolutely nothing “special” about what Green Diamond will do here, as its clearcuts will not be modified in any way to accommodate the known-presence of Humboldt Martens.


Indeed, the only thing that’s “special” in any way in this scenario is the treatment afforded to Green Diamond by the California Department of Fish and Wildlife (CDFW). In late 2018, and nearly simultaneously with the California Fish and Game Commission’s determination that the Humboldt Marten warranted listing as an “Endangered Species” under the California Endangered Species Act (CESA), the Department gave away a “Safe Harbor Agreement” to Green Diamond that gives the company a pass on protecting the Humboldt Marten or having to change its management practices in any meaningful way.


The “Safe Harbor Agreement” framework in the California Fish and Game Code was created with the caveat that any such agreements entered into with private landowners by CDFW must be shown to afford a, “net-conservation benefit,” during the life of the agreement for the agreement to be valid. Safe Harbor Agreements, unlike Habitat Conservation Plans (HCPs) under federal law or Native Communities Conservation Plans (NCCPs) established in the California Fish and Game Code, allow landowners and CDFW to agree to actions that result in a net-conservation benefit during the life of the agreement, with the understanding that the landowner has the right to return the lands under the agreement back to the baseline condition when the agreement expires or is terminated.


Green Diamond timberlands in the Lower Klamath and Upper Redwood Creek watersheds are critical habitat connectivity areas and areas important for natural dispersal, and perhaps eventually, assisted re-introduction and dispersal of Humboldt Martens between two of the only three known Extent Marten Population Areas on the Six Rivers National Forest to the east, and Redwood National and State Parks to the west.


The “Arrow Mills” THP will create clearcuts that will create massive dead-zones in marten connectivity and dispersal opportunities and could result in direct mortality and indirect mortality of Humboldt Martens known to exist on Green Diamond lands and on adjacent conserved lands on both sides.

The “Arrow Mills” THP is currently still under review lead by the California Department of Forestry and Fire Protection (CAL FIRE), the CEQA Lead Agency for approving private timber harvesting plans in California. CAL FIRE cannot approve a THP that will violate other applicable laws under its authority, even if another agency, like CDFW, reaches agreement with a private timberland owner on certain practices.


advocating for northwest california since 1977

The Environmental Protection Information Center (EPIC) is a grassroots 501(c)(3) non-profit environmental organization founded in 1977 that advocates for the science-based protection and restoration of Northwest California’s forests, watersheds, and wildlife with an integrated approach combining public education, citizen advocacy, and strategic litigation.

Open by appointment

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