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 Sweetwater Well to Spring Valley Caverns 3 to Lost River Rise. Indeterminant trace from Lycator Sink to Lost River Rise. Positive trace from Tunnel Mill to ??. Positive trace from Last Ditch Drain to Graff Spring and Triplet Rise.
Spong, Ronald C.
Stewartville A 24k USGS DRG Topo Map.
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