We created a streams map in our GIS that was based on field observations and interpretation of topographic maps and aerial photographs. We depicted streams as continuous where they flowed through ponds, impoundments, or large wetlands. We mapped the likely location of streams that are diverted underground only when they re-surfaced at a distance of less than 200 meters (650 ft). The courses of many small headwater streams we observed in the field were difficult to map based on aerial photographs and other remote sources, especially under conifers; when not visible remotely, we mapped them to the best of our ability based on locations and bearings taken in the field and GIS contour data. We expect there were additional intermittent streams that we did not map, and we recommend these be added to the database as information becomes available. Because it was often difficult to distinguish between perennial and intermittent streams based on aerial photograph and map interpretation, these distinctions were made using our best judgment. Streams that were channelized or diverted by humans (i.e., ditches) were mapped when observed in the field or on aerial photos; we included ditches as stream habitat because they function as such from a hydrological perspective.