Lillooet, AAC Rationale

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Role and limitations of the technical information used

The Forest Act requires me to consider biophysical as well as social and economic information in the AAC determination. A timber supply analysis, and the inventory and growth and yield data used as inputs to the analysis, formed the major body of technical information used in my AAC determination for the Lillooet TSA. The timber supply analysis and associated inventory are concerned primarily with biophysical factors¾such as rate of timber growth and definition of the land base considered available for timber harvesting¾and with management practices. The analysis also indirectly incorporates some economic information such as an operability classification that defines the types of terrain and timber that can be physically and economically accessed given current technology and markets.

However, the analytical techniques used to assess timber supply are simplifications of the real world. There is uncertainty about many of the factors used as inputs to timber supply analysis due in part to variation in physical, biological and social conditions, although ongoing science-based improvements in the understanding of ecological dynamics will help to reduce some of this uncertainty.

Furthermore, technical analytical methods such as computer models cannot incorporate all of the social, cultural, and economic factors that are relevant when making forest management decisions. Therefore, technical information and analysis do not necessarily provide the complete answer or solution to forest management decisions such as AAC determinations. The information does, however, provide valuable insight into potential impacts of different resource-use assumptions and actions, and thus forms an important component of the information I must consider in AAC determinations.

In making the AAC determination for the Lillooet TSA, I have considered known limitations of the technical information provided, and I am satisfied that the information provides a suitable basis for my determination.

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