FORT UNION Historic Structure Report

The Base Map itself consists of ten sheets at a scale of one inch to one hundred feet. A master index sheet gives the relationship between the ten Base Map sheets. On the Base Maps, the plan of the historic structures are shown in black, while present features and contours are shown in grey. Hatching indicates either that the dimensions or the interior plan of a structure is somewhat conjectural. If the outline of the structure is dashed, the plan is conjectural; if solid, only the interior is conjectural. Fine dotted lines indicate a fence, or a palisade wall of upright posts. Double lines of dash-dot are roads. Small open circles are posts or tree stumps. Small, finely hatched rectangles are chimney bases whose locations were plotted by the survey.

(The base maps have been omitted from the online edition).