This thesis presents a comprehensive phonological analysis of the Weledeh dialect of Dogrib, a Northern Athabaskan language spoken in the Northwest Territories, Canada, based on the author's own fieldwork. The phonology of Northern Athabaskan languages, and Dogrib in particular, has to date been regarded as highly irregular, and subject to extensive morphological conditioning. This thesis presents an alternative view, whereby the morphophonemic alternations of Dogrib are conditioned prosodically, by factors such as stress, tone, syllable weight, and foot boundaries. When prosodic factors are taken into account, the need for morphological conditioning is greatly reduced, and the resulting phonological system is much more regular than previously thought. As a general theoretical framework, I assume the theory of Lexical Phonology (Kiparsky 1982, 1985, Mohanan 1986). A central tenet of this theory is level ordering, by which affixes are added in successive stages, known as levels (or strata), and different rules (or constraints) apply at each level. Specifically, I assume that Dogrib phonology is organized into a total of five levels: the Root Level (Level 1), the Inner Stem Level (Level 2), the Outer Stem Level (Level 3), the Word Level (Level 4) and the Postlexical Level (Level 5), as has been proposed previously for the related languages Slave (Rice 1982, 1989) and Sekani (Hargus 1988). Within this framework, I argue for the Prosodic Reversal Hypothesis, which claims that the conjunct prefixes (Levels 2 and 3) follow an iambic (weak-strong) stress pattern, with feet constructed from left to right, whereas the disjunct prefixes (Levels 4 and 5) are trochaic (strong-weak), with feet constructed from right to left. In addition, the phonological processes of both systems are typologically normal, in that they follow the Iambic/Trochaic Law (Hayes 1995): iambic feet cause both lengthening in strong position and syncope in weak position, while trochaic feet cause deletion of medial consonants and repair degenerate feet through gemination. This IV situation is most likely due to a prosodic shift which Dogrib underwent historically, from a predominantly iambic to a predominantly trochaic system. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]