It took about 12 days for dye put into Mill Creek Sink to show up six miles northwest in Hornsby Spring. That spring is on the far side of High Springs. It runs into the Santa Fe River.

Mill Creek Sink, Alachua, FL 2026-01-13, Cave complex connects to Hornsby Spring, Santa Fe River

Anything that goes into Mill Creek Sink could affect drinking water for the city of High Springs, as well as Hornsby Spring and the Santa Fe River. And probably other things nearby over the Floridan Aquifer.

The dye trace is according to MILL CREEK and LEE SINKS DYE TRACE ALACHUA COUNTY, FLORIDA JULY-DECEMBER, 2005,
Prepared for: Alachua County Environmental Protection Department, 201 SE 2nd Avenue, Suite 201, Gainesville, FL 32601;
Prepared by: Peter L. Butt, Stephen Boyes, P.G. and Thomas L. Morris, Karst Environmental Services, Inc., 5779 NE County Road 340, High Springs, FL 32643, June 7, 2006.

There are pictures below of Mill Creek Sink that I took on January 13, 2026. Continue reading →