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United States
Moab Mine

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 Location:
10 km SW from Moab, Utah, United States

  Address:
Hwy 279, Mine Site Road
Moab
Utah, United States
84532
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WebsiteWeb
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Overview

StageProduction
Mine TypeIn-Situ
Commodities
  • Potash
Mining Method
  • Solution mining
Production Start...
Mine Life25 years (as of Jan 1, 2021)


Owners

Source: p. 112
CompanyInterestOwnership
Intrepid Potash, Inc. 100 % Indirect

Contractors

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Deposit Type

  • Evaporite


Summary:

Mineral Deposit Evaporite cycles within the Paradox Formation exhibit a lateral extent of over 11,000 square miles in southeastern Utah and southwestern Colorado (Hite 1960). The Pennsylvanian-age Paradox Formation records multiple episodes of evaporitic deposition, predominantly consisting of massive, crystalline halite with economically attractive occurrences of potash. Deposition of the evaporite soccurred in a vast, flat basin resulting in each additional layer, or bed, being originally deposited in a horizontally planar orientation. Subsequent deposition of overlying sediments provided enough lithostatic pressure to initiate lateral and vertical migration of the more buoyant salt deposits. In many instances, salt flowed towardlinear subsurface structures, such as a fault, and then upward to form what is known as a salt wall. The rising salt typically forms an anticline in overlying strata with surficial expressions of 30 to 75 miles long and 2 to 4 miles wide (Doelling 1985). This collection of northwest-trending, elongate structures is referred to as the Paradox Basin fold and fault belt. Due to the highly deformed nature of the evaporite deposits, it is not uncommon to encounter very high-angle and even over turned strata in exploratory drill holes. The Intrepidlease area is in the southwestern portion of the fold and fault belt where broad salt anticlines are more common than high-angle salt walls. Local examples of these domal salt-cored anticlines include the Big Fl ........


Mining Methods

  • Solution mining


Summary:

Mining at Intrepid-Moab is by the solution mining technique referred to as “selective solution mining.” Selective solution mining dissolves only the KCl component of the sylvinite and leaves the sodium chloride component underground.

Brine saturated in NaCl and partially saturated in KCl is injected into either the old mine workings of Bed 5 or the horizontal Bed 9 caverns via injection wells. Brine that is near saturation with KCl (pregnant brine solution) is with drawn via extraction wells. The old works solution is essentially an underground lake. The horizontal caverns operate under pressure, thus requiring the injection and extraction to take place simultaneously. The pregnant brine solution is piped to shallow evaporation/solar ponds with an aerial expanse ofapproximately 400 acres.

KCl production is a function of brine grade and the well extraction rate and is limited by the solar ponds’ evaporation rate. Brine grade is a function of retention time within each bed.

Solution Mining Bed 5
Since 1971, solution mining from Bed 5 has produced approximately 5.5 Mt of KCl.

Since 2015, extracted brine from Bed 5 is a mixture of KCl from both beds and therefore, it is not possible to determine exactly how much of each bed’s KCl is being produced. For this estimation, the assumption is made that all injected KCl is extracted on an annual basis. Therefore, Bed 5 KCl production is the difference in KCl extracted from the wells and ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2021202020192018201720162015
Potash k tons  ......  Subscription required  ......  Subscription required  ......  Subscription required1051099793
All production numbers are expressed as salt.
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required509 k tons506 k tons472 k tons429 k tons
Annual production capacity  ......  Subscription required  ......  Subscription required110 k tons of potash salt110 k tons of potash salt110 k tons of potash salt110 k tons of potash salt
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Reserves at December 31, 2021:
Cut-off: Minimum of 3-ft and 18.95%K2O.

CategoryTonnage CommodityGradeContained MetalRecoverable Metal
Proven & Probable M tons Potash M tons 2.5 M tons
Proven & Probable M tons K2O 27.5 %
Measured 113 M tons K2O 26 % 30 M tons
Indicated 190 M tons K2O 25 % 47 M tons
Measured & Indicated 303 M tons K2O 25 % 77 M tons
Inferred 38 M tons K2O 23 % 9 M tons



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
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Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Form 10-K 2018
Form 10-K 2017
Form 10-K 2016
Other 2016
Annual Report 2015
Annual Report 2008
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