
Keystone Lake dominates the eastern and southern reaches of this landscape where the borders of Pawnee and Creek counties meet. The settlement of Terlton sits on the western edge of the quadrangle, connected to the larger community of Mannford and the lakeside village of Westport by a network of rural roads such as Terlton 48 Rd and Old State Hwy 51. The terrain is defined by the intricate finger-like inlets of the lake, which has submerged the lower valleys of House Creek and Cowskin Creek. Local history is anchored by sites like Terlton Cemetery near Orcutts Corner and Oakhill Cemetery to the southeast. The transition from agricultural upland roads like Jordan Valley Rd to the expansive water of the reservoir illustrates the region's managed hydrology and its impact on local transit and settlement patterns.
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