Lillooet, AAC Rationale

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- forest cover requirements

In order to protect forest resource values such as wildlife, water quality and aesthetics, forest cover objectives are developed that prescribe the "green-up" stand conditions that must exist on a reforested site before timber on adjacent areas may be harvested. This provides for a distribution of harvested areas and retained forest cover across the landscape in keeping with overall management objectives for an area.

In the Lillooet TSA, the timber supply analysis modelled 6 different management zones on the TSA's timber harvesting land base. The objectives for, and management of, specific forest resources in the Lillooet TSA, such as wildlife, water and visual quality, are discussed under the relevant sections below.

The majority of the TSA (about 76 percent) is subject to forest cover objectives for general IRM. For these areas, no more than 33 percent of the area may be under the cover of stands that are shorter than 3 m in height. This equates approximately to a 3-pass harvesting system, which was used in the BCFS analysis. District staff indicate that the current practice is now for a combination of 4-pass and 3-pass harvesting. Sensitivity analysis indicates that changing to a 4-pass system would have no effect on the base case. Therefore, I am satisfied that, for this determination, the base case reasonably incorporates the effects of general IRM guidelines.

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