United Kingdom

Winsford Mine

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Categories

Overview

Mine TypeUnderground
StatusActive
Commodities
  • Salt (rock)
Mining Method
  • Continuous
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SnapshotThe Winsford mine is the largest dedicated rock salt mine in the U.K.

The Winsford mine is Britain’s largest supplier of natural rock salt, which is used by maintenance professionals to thaw icy roads in wintry weather.

The underground mine Winsford is operated with modern mining equipment and utilizes subsurface improvements, such as vertical shaft lift systems, milling and crushing facilities, maintenance and repair shops and extensive raw materials handling systems.

Owners

SourceSource
CompanyInterestOwnership
Compass Minerals International Inc. 100 % Indirect

Deposit type

  • Sedimentary

Summary:

The final rock formation at Winsford has four distinct rock salt seams or ‘halite’ as it is known (halite is taken from the Greek word ‘hals’, meaning salt). Each rock salt seam averages 25 metres (80ft) in thickness. The remaining strata consist of rock salt with Keuper Marl bands and Keuper Marl. The youngest of the Triassic rocks in the series, Keuper Marl is usually amber or brown in colour, although on occasions it can be blue or green. Due to many of the influencing geological aspects, the colour of Winsford’s salt varies greatly – it can range from clear to pink through to dark brown, although a mixture of dark brown and pink is most commonly found. The beds of salt worked at Winsford are relatively flat (see diagram). There are two economically workable beds of salt known locally as Zone ‘B’ and Zone’F’. These beds lie between 130 and 220 metres below the surface. As discussed earlier the bed is, on average, 25 metres thick but the purest salt is located in the lower part of the bed. Winsford rock salt is more than 90% pure sodium chloride, with the remaining insolubles consisting mainly of Keuper Marl, which is a layer of clay from the late Triassic or ‘Keuper’ period. Keuper Marl has weathering properties, which give Winsford rock salt its unique ‘thatching’ effect, protecting the salt quality. Marl also contributes to improved friction when salt is used as a highway deicer.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

Operational metrics

Metrics20232022202120202019201820172016
Annual production capacity  ....  Subscribe  ....  Subscribe  ....  Subscribe  ....  Subscribe1,500,000 tons of salt (rock) de-icing salt1,500,000 tons of salt (rock) de-icing salt1,500,000 tons of salt (rock) de-icing salt1,500,000 tons of salt (rock) de-icing salt

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Fleet data has not been reported.

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 13, 2024
....................... Subscription required ....................... Subscription required Subscription required Feb 13, 2024
....................... Subscription required ....................... Subscription required Subscription required Feb 16, 2024
....................... Subscription required ....................... Subscription required Subscription required Feb 13, 2024

Aerial view:

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