In 1881, the discovery of phosphate rock in the
Peace River near Ft. Meade initiated the mining of the Bone Valley
Deposit, the world's largest deposit of phosphate rock.
Phosphate is an essential nutrient for plant growth
and a key ingredient in agricultural fertilizers. Tenoroc is part
of an area where high grade ore lies close to the surface. The area
was extensively surface mined between 1960 and 1978 by the Coronet
Fertilizer Company (the name "Tenoroc" is "Coronet" spelled
backwards), the Smith-Douglass Company, and Borden, Inc. In
September 1982, Borden, Inc. donated 6,058 acres to the State of
Florida. Two additional tracts were acquired through purchase: 341
acres with funds from the Non-Mandatory Reclamation Trust Fund and
Preservation 2000 in 1998, and 986 acres through the Preservation
2000 Inholdings and Additions program in 2000.