Annotated by: Ronald C. Spong 1992. 24k USGS topo map containing dye input points, dye vectors and spring where dye was detected. Positive trace from Mystery Cave 1 to Seven Springs. Positive trace from Downwater Sink to Trout & Blackrock Springs. Positive trace from Sikkink Sink to Trout & Blackrock Springs. Indeterminant trace from York Blind Valley to Nelson Rise. Negative trace from York Blind Valley to Border Uprising and Swenson Springs.
Spong, Ronald C.
Cherry Grove USGS 24k DRG Topo Map.
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