This document was prepared primarily by stereoscopic analysis of high altitude aerial photographs. Wetlands were identified on the photographs based on vegetation, visible hydrology, and geography in accordance with classification of Wetland and Deepwater Habitats of the United States (FWS/OBS-79/31 December 1979). The aerial photographs typically reflect conditions during the specific year and season when they were taken. In addition there is a margin of error inherent in the use of the aerial photographs.
United States Department of the Interior, Fish and Wildlife Service, "National Wetlands Inventory Maps, Logan, (Ogden NW) UT, USFWS" (1993). Water. Paper 11.