Image of the Month
When the sea 'ran' red.
When the mine was working, a vast amount of water was needed to process the tin ore (approx 1000 gallons of water to process one kilo of tin). The sea water pumped out from underground was sent straight back to the sea, but the fresh water was stored in large tanks and used in the Mill. The fresh water was recycled several times before being discharged down the site and over the cliffs into the sea. The small quanitites of iron in this water, from underground and from washing the ore in the Mill, turned it a deep red colour which washed out to sea for a considerable distance around Trewellard Zawn. This photographs was taken in the early 1980s. The sea is no longer red. Today, strict pollution laws would not allow this. However, many locals still remember when the sea ‘ran’ red. About 150 years ago, when most of the St. Just mines were at work, the sea would have been red for miles around the coast.
Photo by kind permission of David Wills.