554  UTAII—1992County, used quicklime as a neutralizer in the company-owned
landfill. 
 The long-term outlook for lime 
production is good for several reasons. A continued upswing in the economy
of 
Utah can be expected to be reflected in a continued strong construction industry.
New tariffs on steel imports should result in increased domestic steel production,
the largest industrial consumer of lime. The largest boost, however, will
come 
from passage of the Clean Air 
Amendments. Demand for lime for flue gas desulfurization will steadily increase
as the January 1, 1995, deadline for 
, phase 1 compliance approaches. A 
I significant number of utilities will use 
~ lime for desulfurization as a compliance 
~ strategy. Use of lime for water purification will be boosted by Safe 
~, Drinking Water Act regulations requiring 
corrosion control to lower the rate at 
~ which lead in water pipes dissolves. 
~ Clean Air and Water Quality regulations also should increase demand for
lime for pH control in industrial and mine 
drainage wastewater treatment and disposal of sewage sludge. 
 
Magnesium Compounds.—Magneaium 
compounds (magnesium chloride) production increased more than 40% from that
reported in 1991. Great Salt Lake Minerals and Chemicals Corp. 
produced magnesium chloride as a byproduct of potash and salt production

from Great Salt Lake brines at the 
company plant west of Ogden in Weber County. Reilly Industries Inc. produced
magnesium chloride from subsurface brines of the Bonneville Salt Flats at
a plant south of Wendover in Tooele County. Plant capacities are 90,000 metric
tons of MgO equivalent at the Great Salt Lake Minerals and Chemicals Corp.
plant and 45,000 metric tons at the Reilly Industries Inc. plant. 
 Seawater, brines, and bitterns account for more than 60 % of magnesium compounds
produced annually in the United States. Magnesium chloride is used in chemical
processing and in oxychloride cements. Magnesium chloride brines are used
for road dust control and chemical processing. 
Phosphate Rock.—Utah's phosphate 
rock production increased slightly from 
that reported in 1991. Of the five States with production of phosphate rock,
Utah 
ranked fourth. 
 FS Industries (a joint venture between 
Farmland Industries and J.R. Simplot) completed purchase of the Chevron Resources
Co. operation near Vernal, Uintah County, where phosphate rock is mined and
beneficiated. Ground 
phosphate is pumped through a slurry pipeline to the company's fertilizer
plant at Rock Springs, WY. 
 Although fertilizer prices were at a 30year low, the mine will continue
to operate because of its unique situation as a captive operation: the mine
and plant operators and end users are all part of FS Industries. 
 
 Potash.—Utah was the second largest 
of four potash-producing States in 1992. 
Potash production increased about 9% 
from that reported in 1991 while the 
value increased about 6%. 
 Moab Salt Inc. produced muriate of 
potash for Texasgulf Chemical Co. Production was from underground bedded
evaporite deposits by two-well solution 
mining followed by solar evaporation. 
Moab Salt is solution mining an old 
underground potash mine near Moab, Grand County. A flotation circuit is used

to separate the sylvite from halite 
harvested from the solar evaporation ponds. Elf Aquitaine Inc. ' s (Texasgulfs
parent company) 1992 Annual Report showed improved performance of the solar
ponds during 1992. 
 Great Salt Lake Minerals & Chemicals 
Corp. (GSLMC) produced sulfate of potash (potassium sulfate) from brines
of the north arm of Great Salt Lake by solar evaporation and beneficiation.
The State Land Board increased royalties charged to GSLMC for production
of chemically enhanced potash. The increase related to the chemical (potassium
chloride) the , company adds to lake brines to increase ~ production of potassium
sulfate—a more ~ valuable form of potash. The increase will be
effective
January 1, 1995. 
GSLMC began work on a new solar- 
evaporation pond on the west side of the lake. Brines will be brought to
the pond through a 32-kilometer (20-mile) 
underwater channel that carries concentrated brines across the lake to the
intake of the Weber County facility. The new 7,080-hectare (17,500-acre)
pond will increase available evaporation pond size to 14,970 hectares (37,000
acres) 
and should result in increased potash production from 181,440 metric tons
(200,000 short tons) per year to about 308,448 metric tons (340,000 short
tons) per year. 
 Reilly Industries Inc. produced muriate of potash and manure salts (potassium
chloride) by solar evaporation of nearsurface brines at the Reilly Wendover
plant at the west end of the Bonneville Salt Flats. The potash was beneficiated
by froth flotation where sylvite was separated from the sylvinite (a sylvitehalite
salt mixture). 
 
 SaU.—The production of salt (sodium chloride) in Utah increased
slightly
in 1992 from that reported in 1991. Utah ranked sixth out of 14 States producing
salt with about S % of the total domestic production. The significant change
in the value of salt production for 1991, shown on table 1, apparently was
the result of incorrect interpretations of survey data and does not reflect
an actual change in the unit value of salt produced. Because the source of
the error has not been identified, the value for 1991 production has not
yet been revised. 
 Akzo Salt Inc. , Great Salt Lake Minerals and Chemicals Corp., and Morton
International Inc. used shallow solar evaporation ponds to harvest solar
salt from Great Salt Lake brines. Reilly, at its plant near the Bonneville
Salt Flats in Tooele County, and Crystal Peak Minerals Corp. , at its plant
at the southern end of Sevier Lake in Millard County, produced solar evaporated
salt from shallow subsurface brines. The Redmond Clay and Salt Co. mined
rock salt from a bedded salt deposit at its underground mine in Sevier County.

Moab Salt Inc. , Grand County, produced salt as a byproduct from its potash
solution mining operation.