1. This is a letter or memo written by a member of the Forest and Range Evaluation Program, Peter Bradshaw, in November 2003. The text relevant to the 6 percent cap on timber supply impact stated:
“The objectives in the Forest Planning and Practices Regulation includes the statement that the objective not unduly reduce the supply of timber from BC’s forests, for several non-timber values. The intent of this language is to ensure that conservation of non-timber values is undertaken in balance with economic benefits associated with values. FRPA is to be guided by the timber supply impact targets (6% cap) that aided implementation of the Forest Practices Code. Under the Code, the “adequately manage and conserve” plan approval test was guided by government’s timber supply impact targets. Under FRPA, this test is written into the objectives themselves.”
Full document: Summary of resource value objectives.odt
2. A cap of 4 percent on the impact of provisions to protect biodiversity is referenced on page 9 of the 1995 Forest Practices Code of British Columbia Biodiversity Guidebook. Later, in 1999, a memorandum guiding the establishment of Landscape Level Planning and Old Growth Management Units set the cap on the impact of biodiversity objectives on timber supply at 4.1 to 4.3 percent (page 3).
1995 Biodiversity Guidebook : 1995 Biodiversity Guidebook (Forest Practices Code).pdf
1999 Memorandum: Memorandum on establishment of Landscape Level Planning 1999.pdf
3. The Frequency of Stand-replacing Natural Disturbance (2003) by Karen Price and Dave Daust: The Frequency of Stand-replacing Natural Disturbance-Price and Daust-2003.pdf
4. This reference is found in a summary chart of disturbance return intervals on page 52 of the Interim Assessment Protocol for Forest Biodiversity in British Columbia (2020). Interim Assessment Protocol for Forest Biodiversity in British Columbia (2020).pdf
5. This is a reference to the discussion on assessing ecological risk on pages 17-18 of BC’s Old Growth Forest: A Last Stand for Biodiversity (2020) by Karen Price, Rachel Holt and Dave Daust. A-Last-Stand-For-Biodiversity-(2020).pdf
6. The Discovery Islands Forest Conservation Project has mapped old forest on Quadra Island. The project has found approximately 630 hectares of old forest spread amongst 171 fragments. A 1930 inventory of forests on Quadra Island estimated the total area of forest (not including the southernmost area of the island) at 22,913 hectares. If 70 percent of that had been old forest (before European settlers arrived), there would have been about 16,000 hectares of old forest (using the guidance in reference 4 above). 630 hectares is 3.9 percent of 16,000 hectares.