The objectives of this post-impact assessment were to inventory historical resource sites within the development zone; evaluate the significance of the individual sites identified; assess the nature and magnitude of site specific impacts; and to design and implement an acceptable site specific mitigation program which would significantly eliminate potential future impacts to identified sites. Record review was conducted to identify previously recorded sites which could be affected by the development project, and to determine the nature of the database in the area. Ground reconnaissance was done to relocate, previously recorded historical resource sites as well as to identify and record any new sites within the development zone. Site discovery and post-impact assessment and included the visual examination of post-clearing surfaces within the right-of-way and inspection of adjacent exposures. Shovel testing was conducted in areas of identified cultural material or potential site areas lacking suitable exposures. The nature of the existing resource database, the quantity and quality of observable remains (e.g. site condition, content, uniqueness, and complexity) and the potential of the site to contribute to public enjoyment and education was evaluated. The areas targeted for this Historical Resources Post-Impact Assessment were portions of the Ruth Lake MacKay 240 kV Transmission Project and of the Crow and Gregoire 144 kV Transmission Projects, located in north-eastern Alberta. The Ruth Lake - MacKay Transmission Project is approximately 39 kilometres long, extending between the existing Ruth Lake Substation 848S (N1/2 16-92-10-W4M) and the new MacKay Substation (NW 5-93-12-W4M). The Crow Transmission Project is approximately 35 km long, extending between the new Crow Substation 860S and the existing Mariana Substation 833S. The Gregoire Transmission Project extends between the new Gregoire Substation 883S and an existing transmission line 7L36, with a total length of 15 km.