
Indiantown Gap Military Reservation dominates the center of this 1947 landscape, illustrating the heavy military presence in the foothills of Dauphin County following World War II. The terrain is defined by the sharp, linear ridges of Peters Mountain, Sharp Mountain, and Second Mountain, which channel the flow of the Harrisburg Water Supply and Stony Creek. A notable feature for industrial historians is the Manada Furnace and the nearby Manada Furnace Church, remnants of the region's iron history situated south of the namesake Manada Gap.
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1892 · Lykens
USGS Topo · 1:62,500
1892 · Hummelstown
USGS Topo · 1:62,500
1892 · Harrisburg
USGS Topo · 1:62,500
1893 · Lykens
USGS Topo · 1:62,500
1893 · Millersburg
USGS Topo · 1:62,500
1899 · Harrisburg
USGS Topo · 1:62,500
1924 · Hummelstown
USGS Topo · 1:62,500
1924 · Harrisburg
USGS Topo · 1:62,500
1943 · Millersburg
USGS Topo · 1:62,500
1943 · Lykens
USGS Topo · 1:62,500