Spong, Ronald C2017-03-062017-03-061992https://hdl.handle.net/11299/184837Annotated 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.enMap