First Fork Sinnemahoning Creek carves a deep valley through this portion of Potter County, serving as the central artery for the settlements of Costello and Wharton. This landscape is defined by an intricate network of narrow hollows and runs, such as Schoolhouse Hollow and Railroad Hollow, which illustrate the historical reliance on these natural corridors for transport and settlement. Genealogy researchers will find significant value in the numerous burial sites documented across the terrain, including Costello Cem, Saint Joseph Cem, and the more isolated Rees Cem near the northern boundary. The junction of the East Fork with the main branch at Wharton highlights the traditional importance of these river confluences. Further south, the Potter Co and Cameron Co boundary line crosses the rugged peaks, passing near landmarks like Barrett Slide and Colbert Hollow.
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1945 · Driftwood
USGS Topo · 1:48,000
1945 · First Fork
USGS Topo · 1:24,000
1945 · Cameron
USGS Topo · 1:24,000
1946 · Renovo West
USGS Topo · 1:62,500
1946 · Hammersley Fork
USGS Topo · 1:24,000
1947 · Cameron
USGS Topo · 1:24,000
1947 · First Fork
USGS Topo · 1:24,000
1947 · Conrad
USGS Topo · 1:62,500
1947 · Conrad
USGS Topo · 1:24,000
1947 · Ayers Hill
USGS Topo · 1:24,000