Hnt'k'wipn 2005 Habitat Evaluation Procedure Report.
The construction of Albeni Falls Dam was completed in 1955. Prior to construction, the dam was expected to alter approximately 6,300 acres. However, the loss assessment addressed the losses in terms of Habitat Units (HUs) (Martin et al. 1988). HUs are derived by multiplying the Habitat Suitability I...
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2018
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| Online Access: | http://www.osti.gov/servlets/purl/947117 https://www.osti.gov/biblio/947117 https://doi.org/10.2172/947117 |
| Summary: | The construction of Albeni Falls Dam was completed in 1955. Prior to construction, the dam was expected to alter approximately 6,300 acres. However, the loss assessment addressed the losses in terms of Habitat Units (HUs) (Martin et al. 1988). HUs are derived by multiplying the Habitat Suitability Index (HSI) by the number of acres in question. The HSI, in turn, is an index to the habitat carrying capacity for a specific species or guild of species based on a set of habitat performance measures and can be used to assess changes, both positive and negative, in habitat quantity and quality (USFWS 1980, 1980a). The HSI is derived though a HEP that is completed according to species or guild specific models. Variables defined in the models are measured on the landscape; and those measured values are rated according to the model to produce an index to the habitat's suitability. The HSI index ranges from 0.0 to 1.0. An HSI of 0.3 indicates that habitat quality/carrying capacity is marginal while an HSI of 0.7 suggests that habitat quality/carrying capacity is relatively good. Thus an acre of optimum habitat (HSI = 1.0) results in 1 HU. The construction and inundation of Albeni Falls Dam resulted in a loss of 28,587 HUs. This HU ledger was the sum of the losses for each of the chosen target species, which were 5,985 mallard HUs, 4,699 Canada goose HUs, 3,379 redhead HUs, 4,508 breeding bald eagle HUs, 4,365 wintering bald eagle HUs, 2,286 black-capped chickadee HUs, 1,680 white tailed deer HUs, and 1,756 muskrat HUs. The PACIFIC NORTHWEST ELECTRIC POWER PLANNING AND CONSERVATION ACT (1980) made mitigating against the HU ledger associated with the Federal Columbia River Power System (FCRPS), of which Albeni Falls is a part, the responsibility of BPA. The Act also established the Northwest Power and Conservation Council (NPCC), which is responsible for, among other things, establishing the Fish and Wildlife Program to direct the mitigation process. The Bonneville Power Administration funded the acquisition of the ... |
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